Keyword: booster
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MOPMR033 Characterization of Beam Properties Using Synchrotron Light at Taiwan Photon Source synchrotron, storage-ring, injection, photon 316
 
  • C.Y. Liao, Y.-S. Cheng, K.T. Hsu, K.H. Hu, C.-C. Kuo, H.-J. Tsai, C.Y. Wu
    NSRRC, Hsinchu, Taiwan
  
  Taiwan Photon Source (TPS) is a third-generation 3-GeV synchrotron light facility, located in National Synchrotron Radiation Research Center (NSRRC) at Hsinchu Science Park. After overcoming many challenges, the storage beam current attained 520 mA in 2015 December. The synchrotron light monitors, including X-ray and visible light, are important diagnostic tools to characterize the various machine conditions. The booster beam dynamics during ramping and the beam properties of the storage ring were studied with synchrotron light. The results of measurements are presented in this report.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR033  
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MOPMW024 Design of the New Wideband RF System for the CERN PS Booster electronics, acceleration, impedance, controls 441
 
  • M.M. Paoluzzi, S.C.P. Albright, M.E. Angoletta, L. Arnaudon, S. Energico, A. Findlay, M. Haase, M. Jaussi, A.J. Jones, D. Landré, J.C. Molendijk, D. Quartullo, E.N. Shaposhnikova
    CERN, Geneva, Switzerland
  
  For the renovation and upgrade of the CERN PS Booster (PSB) RF systems a development project was launched in 2012. The design, based on a new approach, aimed at replacing the existing tuned, narrowband RF systems with wideband, modular, solid-state driven units. A wide range of issues had to be addressed spanning from RF power production, radiation hardness of solid-state devices, active cancellation of beam-induced voltages, dedicated low-level electronics allowing multi-harmonic operation and beam stability. Following a three-year prototyping and testing campaign and two international reviews, the project endorsement came at the end of year 2015. It foresees the complete removal of present h1, h2 and h10 systems and the deployment of a new one covering all the frequency ranges from 1 MHz to 18 MHz. The four PSB rings will be equipped with 144 identical acceleration cells providing 24 kV total RF voltage per ring. This paper describes the design concepts, the retained solutions, the expected performances and includes the procurement and implementation strategies. This activity is part of the LHC Injectors Upgrade project (LIU).  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMW024  
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MOPMW027 Design of a Perpendicular Biased 2nd Harmonic Cavity for the Fermilab Booster cavity, Windows, impedance, cathode 451
 
  • C.-Y. Tan, J.E. Dey, K.L. Duel, R.L. Madrak, W. Pellico, E. Prebys, J. Reid, G.V. Romanov, D. Sun, I. Terechkine
    Fermilab, Batavia, Illinois, USA
  
  Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
A perpendicular biased 2nd harmonic cavity is currently being designed and built for the Fermilab Booster. The purpose is to flatten the bucket at injection and thus change the longitudinal beam distribution to decrease space charge effects. It can also help with transition crossing. A model cavity has been built to verify various CST Microwave studio and COMSOL results and a test stand has been built to ensure that the Y567 tube is able to operate at twice the Booster fundamental frequencies. Also discussed are the RF windows which are critical to the design. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMW027  
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MOPMW035 Wakefield Excitation in Power Extraction Cavity (PEC) of Co-linear X-band Energy Booster (CXEB) in Time Domain (T3P) with ACE3P cavity, extraction, electron, simulation 477
 
  • T. Sipahi, S. Biedron, S.V. Milton
    CSU, Fort Collins, Colorado, USA
  
  In our previous papers we provided the general concept and the design details of our proposed Co-linear X-band Energy Booster (CXEB) as well as more advanced 3D simulations of our system using the frequency domain solvers OMEGA3P and S3P of the ACE3P Suite. Here, using the time domain solver T3P of ACE3P, we provide the single bunch and multiple bunch wakefield excitations resulting from a Gaussian bunch. The related power extraction mechanism for our traveling wave (TW) X-band power extraction cavity (PEC) are also discussed further.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMW035  
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MOPMY009 HOM Consideration of 704 MHz and 2.1 GHz Cavities for LEReC Linac cavity, HOM, SRF, electron 528
 
  • B. P. Xiao, I. Ben-Zvi, M. Blaskiewicz, J.M. Brennan, J.C. Brutus, A.V. Fedotov, H. Hahn, G.T. McIntyre, C. Pai, K.S. Smith, J.E. Tuozzolo, Q. Wu, T. Xin, W. Xu, A. Zaltsman
    BNL, Upton, Long Island, New York, USA
  • S.A. Belomestnykh
    Fermilab, Batavia, Illinois, USA
  • S.A. Belomestnykh, I. Ben-Zvi
    Stony Brook University, Stony Brook, USA
  • V. Veshcherevich
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  
  Funding: Work supported by Brookhaven Science Associates, LLC under contract No. DE-AC02-98CH10886 and by National Energy Research Scientific Computing Center under contract No. DE-AC02-05CH11231 by US DOE.
To improve RHIC luminosity for heavy ion beam energies below 10 GeV/nucleon, the Low Energy RHIC electron Cooler (LEReC) is currently under development at BNL. The Linac of LEReC is designed to deliver 2 MV to 5 MV electron beam, with rms dp/p less than 5·10-4. The HOM in this Linac is carefully studied to ensure this specification. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMY009  
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MOPOR017 First Year Performance of the TPS Booster Ring emittance, synchrotron, linac, storage-ring 634
 
  • H.-J. Tsai, P.J. Chou, K.T. Hsu, K.H. Hu, C.-C. Kuo, C.Y. Liao, Y.-C. Liu, G.-H. Luo, F.H. Tseng
    NSRRC, Hsinchu, Taiwan
  
  The Taiwan Photon Source (TPS) is a 3-GeV low- emittance light source of circumference 518.4 m. The booster ring is in the same tunnel with the storage ring; its circumference at 496.8 m makes it the largest booster ring in operation in existing light sources. Since the successful commissioning at the end of 2014, the TPS booster ring has been optimized in performance for routine operation. In this paper, we present the system upgrade and the improvement of the ramping procedure to increase the capture and ramping efficiency of the beam charge, the characterization of the optics, etc.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR017  
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MOPOR024 Evolution of High Intensity Beams in the CERN PS Booster after H− Injection and Phase Space Painting emittance, injection, space-charge, lattice 656
 
  • M. Cieslak-Kowalska, J.L. Abelleira, E. Benedetto, C. Bracco
    CERN, Geneva, Switzerland
  
  With the LHC Injector Upgrade (LIU) project, the injection energy of PS Booster (PSB) ' first circular accelerator in the LHC injector chain ' will be raised from 50 MeV to 160 MeV and the present multiturn injection will be upgraded to H− injection with transverse and longitudinal painting. In the scope of this project, it is planned to double the beam intensities, profiting from the fact that the βγ2 factor will be two times larger (0.35 at 50 MeV and 0.71 at 160 MeV), so the resulting tune spread driven by a direct space charge should remain similar. This paper describes the feasibility to double the intensity of high intensity and large emittance beams, looking into the evolution under space charge and taking into account losses constrains in the ring and in the extraction lines.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR024  
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MOPOR033 Simulations of Dark Current from the BERLinPro Booster Module cavity, electron, cathode, simulation 671
 
  • M. McAteer, M. Abo-Bakr, B.C. Kuske, A. Neumann
    HZB, Berlin, Germany
  
  Funding: Work supported by the German Bundesministerium f\"ur Bildung und Forschung, Land Berlin and grants of Helmholtz Association
Dark current emitted from the surface of high-field RF cavities can contribute to radiation levels and cryo budget and can cause damage to sensitive accelerator components such as the photocathode. The superconducting niobium cavities in the booster module of BERLinPro will have surface fields strong enough to produce significant dark current from field emission, so simulations were made using Astra to track the propagation of emitted electrons from the surfaces of the cavities to examine the effects of dark current in the BERLinPro injector. Results of these simulations, including optimization of the layout to reduce propagation of electrons to the cathode and an estimation of power from dark current deposited throughout the injector, are presented. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR033  
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MOPOR043 High-gradient Structures for Proton Energy Boosters linac, proton, cavity, experiment 692
 
  • S.S. Kurennoy, L. Rybarcyk
    LANL, Los Alamos, New Mexico, USA
  
  Increasing energy of proton beam at LANSCE from 800 MeV to 3 GeV can improve radiography resolution ~10 times. The best current practice to achieve this energy boost is to employ superconducting (SC) RF cavities with gradients about 15 MV/m after the existing linac, which results in a long and expensive booster. We propose accomplishing the same with a room-sized booster based on high-gradient (100s MV/m) room-temperature RF accelerating structures operating at low duty factors. Such high-gradient (HG) structures at very high RF frequencies have been demonstrated for electrons. However, they have never been used for protons because typical RF wavelengths are smaller than the proton bunch length. This is not a problem for proton radiography (pRad): a train of very short proton bunches with the same total length (10s ps) and charge as the original proton bunch will work as well, i.e., will create one radiography frame. Such a compact HG pRad booster can also be about an order of magnitude cheaper than the SC one. We explore feasibility of HG structures for protons and their application for a compact pRad booster at LANSCE.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR043  
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MOPOW001 Status of the 1.3 GeV Booster Synchrotron for Generating High Energy Gamma Rays at Tohoku University vacuum, controls, dipole, operation 701
 
  • F. Hinode, H. Hama, S. Kashiwagi, T. Muto, I. Nagasawa, K. Nanbu, Y. Shibasaki, K. Takahashi, C. Tokoku
    Tohoku University, Research Center for Electron Photon Science, Sendai, Japan
  
  The reconstruction work of accelerator complex for the Great East Japan Earthquake in March 2011 had been conducted in Research Center of Electron Photon Science, Tohoku University. Since restoration of the user machine time in 2013, the approved beam time have been regularly implemented as scheduled. Currently, the 1.3 GeV Booster STorage (BST) ring has been well utilized to generate the high energy gamma-rays as before the disaster. The high energy gamma-rays were produced via Bremsstrahlung by inserting an internal target wire to the beam orbit after the beam acceleration. Since the user machine time was recovered, there were some improvements so far, i.e. realignment of synchrotron magnets, orbit correction in energy ramping process by updating the control of power supplies for steering magnets etc., which brought an increase of the beam current in the maximum energy. Present operational status and recent progress of beam performance in the BST ring are reported.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOW001  
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MOPOW019 Commissioning Status of the Extreme-Ultraviolet FEL Facility at SACLA FEL, electron, undulator, laser 757
 
  • T. Sakurai, T. Asaka, N. Azumi, T. Hara, T. Hasegawa, T. Inagaki, T. Ishikawa, R. Kinjo, C. Kondo, H. Maesaka, T. Ohshima, Y. Otake, H. Tanaka, T. Tanaka, K. Togawa
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  • T. Bizen, N. Hosoda, H. Kimura, S. Matsubara, S. Matsui
    JASRI/SPring-8, Hyogo, Japan
  
  To equip SACLA with wide ability to provide a laser beams in EUV and soft X-ray regions to experimental users, we have constructed a new free electron laser facility for SACLA beamline-1. Injector components, such as a thermionic electron gun, two buncher cavities, a S-band standing wave accelerator, S-band travelling wave accelerator and their RF sources, were relocated from the SCSS test accelerator, which was a prototype machine of SACLA. At the downstream of a bunch compressor chicane, three C-band 40 MV/m acceleration units were newly installed to effectively boost a beam energy up to 470 MeV. Two in-vacuum undulators were remodeled by changing the period of magnet array from 15 mm to 18 mm to increase SASE intensity by a larger K-value of 2.1. Beam commissioning was started in autumn 2015. So far SASE radiation at a 33 nm wavelength driven by a 470 MeV electron beam was observed. We will install the third undulator in this winter to obtain SASE saturation and additional C-band accelerator units in the next summer to raise the maximum beam energy to 750 MeV. In this presentation, the overview of the facility and the commissioning status will be reported.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOW019  
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MOPOY007 High Energy Booster Options for a Future Circular Collider at CERN injection, collider, extraction, hadron 856
 
  • L.S. Stoel, M.J. Barnes, W. Bartmann, F. Burkart, B. Goddard, W. Herr, T. Kramer, A. Milanese, G. Rumolo, E.N. Shaposhnikova
    CERN, Geneva, Switzerland
  
  In case a Future Circular Collider for hadrons (FCC-hh) is constructed at CERN, the tunnels for SPS, LHC and the 100 km collider will be available to house a High Energy Booster (HEB). The different machine options cover a large technology range from an iron-dominated machine in the 100 km tunnel to a superconducting machine in the SPS tunnel. Using a modified LHC as reference, these options are compared with respect to their energy reach, magnet technology and filling time of the collider. Potential issues with beam transfer, reliability and beam stability are presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY007  
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MOPOY012 Space Charge Simulations in the Fermilab Recycler for PIP-II simulation, space-charge, proton, experiment 870
 
  • R. Ainsworth, P. Adamson, I. Kourbanis, E.G. Stern
    Fermilab, Batavia, Illinois, USA
  
  Proton Improvement Plan-II (PIP-II) is Fermilab's plan for providing powerful, high-intensity proton beams to the laboratory's experiments. Upgrades are foreseen for the recycler which will cope with bunches containing fifty percent more beam. Of particular concern is large space charge tune shifts caused by the intensity increase. Simulations performed using Synergia are detailed focusing on the space charge footprint.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY012  
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MOPOY013 Modeling Longitudinal Dynamics in the Fermilab Booster Synchrotron impedance, emittance, synchrotron, simulation 873
 
  • J.-F. Ostiguy, C.M. Bhat, V.A. Lebedev
    Fermilab, Batavia, Illinois, USA
  
  Funding: Work performed under U.S. Government contract DE-AC02-07CH11359
The PIP-II project will replace the existing 400 MeV linac with a new, CW-capable, 800 MeV superconducting one. With respect to current operations, a 50% increase in beam intensity in the rapid cycling Booster synchrotron is expected. Booster batches are combined in the Recycler ring; this process limits the allowed longitudinal emittance of the extracted Booster beam. To suppress eddy currents, the Booster has no beam pipe; magnets are evacuated, exposing the beam to core laminations and this has a substantial impact on the longitudinal impedance. Noticeable longitudinal emittance growth is already observed at transition crossing. Operation at higher intensity will likely necessitate mitigation measures. We describe systematic efforts to construct a predictive model for current operating conditions. A longitudinal only code including a laminated wall impedance model, space charge effects, and feedback loops is developed. Parameter validation is performed using detailed measurements of relevant beam, rf and control parameters. An attempt is made to benchmark the code at operationally favorable machine settings. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY013  
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TUOAA03 Long Term Plans to Increase Fermilab's Proton Intensity to Meet the Needs of the Long Baseline Neutrino Program proton, linac, experiment, injection 1010
 
  • E. Prebys, P. Adamson, S.C. Childress, P. Derwent, S.D. Holmes, I. Kourbanis, V.A. Lebedev, W. Pellico, A. Romanenko, V.D. Shiltsev, E.G. Stern, A. Valishev, R.M. Zwaska
    Fermilab, Batavia, Illinois, USA
  
  Funding: This work is supported by the US Department of Energy under contract No. De-AC02-07CH11359.
The flagship of Fermilab's long term research program is the Deep Underground Neutrino Experiment (DUNE), located Sanford Underground Research Facility (SURF) in Lead, South Dakota, which will study neutrino oscillations with a baseline of 1300 km. The neutrinos will be produced in the Long Baseline Neutrino Facility (LBNF), a proposed new beam line from Fermilab's Main Injector. The physics goals of the DUNE require a proton beam with a power of roughly 2.5 MW at 120 GeV, which is roughly five times the current maximum power. This poster outlines the staged plan to achieve the required power over the next 15 years. 		 
slides icon Slides TUOAA03 [4.129 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUOAA03  
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TUPMB003 ILSF Booster Magnets for the New Low Emittance Lattice sextupole, quadrupole, dipole, extraction 1104
 
  • S. Fatehi
    IPM, Tehran, Iran
  • M. Jafarzadeh, J. Rahighi
    ILSF, Tehran, Iran
  
  Iranian light source facility is a 3 GeV storage ring with a booster ring which is supposed to work at 150Kev injection energy and guide the electrons to the ring energy 3GeV. In this paper magnet design of the booster ring is discussed. It consists of 50 combined bending magnets in 1 type, 50 quadrupoles and 15 sextupoles in 1 family. Using POISSON, Maxwell Ansys and Radia codes, two and three dimensional pole and yoke geometry was designed, also cooling and electrical calculations have been done.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMB003  
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TUPMB046 The Preliminary Conceptual Design of a 2k Cryogneic System for Circular Electron Positron Collider (CEPC) cryogenics, collider, cryomodule, cavity 1199
 
  • Y.P. Liu, L. Bian, R. Ge, R. Han, S.P. Li, M.J. Sang, L.R. Sun, M.F. Xu, R. Ye, J.Q. Zhang, J.H. Zhang, X.Z. Zhang, Z.Z. Zhang
    IHEP, Beijing, People's Republic of China
  
  The Circular Electron Positron Collider (CEPC) is a long-term collider project, which will serve as a Higgs Factory and offer a unique opportunity for direct searches for New Physics in the high-energy range far beyond LHC reach [1]. In the frame of this project, a large 2K cryogenic system will be built to provide coolant for superconducting cavities used in booster ring and collider ring. All the superconducting cavities will be working under 2K. This paper will give a brief introduction to the preliminary considerations of this large cryogenic system, including the general layout, heat load estimation, helium refrigerator, schematic flow diagram as well as the main parameters and working process  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMB046  
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TUPMB051 Commisioning of Facility for Assembling and Tests of Superconducting Magnets dipole, collider, quadrupole, synchrotron 1215
 
  • S.A. Kostromin, V.V. Borisov, A.M. Donyagin, A.R. Galimov, O. Golubitsky, H.G. Khodzhibagiyan, S.A. Korovkin, G.L. Kuznetsov, D. Nikiforov, A.Y. Starikov, A. Tikhomirov
    JINR, Dubna, Moscow Region, Russia
  • A.V. Kudashkin, T.E. Serochkina, A.V. Shemchuk
    JINR/VBLHEP, Dubna, Moscow region, Russia
  
  The NICA accelerator complex will consist of two injector chains, the new 600 MeV/u superconducting (SC) booster synchrotron, the existing SC synchrotron Nuclotron, and the new SC collider having two rings each of 503 m in circumference. The building construction of the new test facility for simultaneous cryogenic testing of the SC magnets on 6 benches is completed at the Laboratory of High Energy Physics. Premises with an area of 2600 m2 were prepared, equipment for magnets assembly and tests are installed. Three helium satellite refrigerators with each capacity of 100 W were commissioned 2 of 6 test benches for magnets testing are assembled and commissioned. NICA booster magnets fist cryogenic tests are done. The results are discussed.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMB051  
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TUPMY005 A Muon Source Proton Driver at JPARC-based Parameters proton, injection, linac, operation 1550
 
  • D.V. Neuffer
    Fermilab, Batavia, Illinois, USA
  
  Funding: Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the U. S. Department of Energy.
An "ultimate" high intensity proton source for neutrino factories and/or muon colliders was projected to be a ~4 MW multi-GeV proton source providing short, intense proton pulses at ~15 Hz. The JPARC ~1 MW accelerators provide beam at parameters that in many respects overlap these goals. Proton pulses from the JPARC Main Ring can readily meet the pulsed intensity goals. We explore these parameters, describing the overlap and consider extensions that may take a JPARC-like facility toward this "ultimate" source. JPARC itself could serve as a stage 1 source for such a facility. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMY005  
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TUPOW032 Modelling of the Short Bunch Optics for BERLinPro linac, emittance, simulation, space-charge 1820
 
  • A. Ginter, A.N. Matveenko
    HZB, Berlin, Germany
  
  The Energy Recovery Linac principle allows compressing electron bunches to lengths at least two orders of magnitude shorter compared to storage rings. At BERLinPro bunch compression and decompression can be done in two stages in the injector and main arcs. Starting with different bunch lengths from the gun the distribution of compression between these two stages is subject to optimization. Simulations show that the length and shape of the bunch in the injector and before the linac are the limiting factors for minimal bunch length. Injector simulations have to consider space charge effects, whereas CSR effects are limiting compression in the arcs. The strength of these effects and optimal compression ratios changes with different bunch charges. Optimization and simulation tools have to be chosen according to the energy regime and dominant collective effects. Current status of injector optimization and effect on the compressed bunch are presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW032  
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TUPOY017 Beam Energy Deposition from PS Booster and Production Rates of Selected Medical Radioisotopes in the CERN-MEDICIS Target target, proton, ion, extraction 1936
 
  • B.C. Gonsalves, R.J. Barlow, S.C. Lee
    IIAA, Huddersfield, United Kingdom
  • R.M. Dos Santos Augusto
    LMU, München, Germany
  • T. Stora
    CERN, Geneva, Switzerland
  
  CERN-MEDICIS uses the scattered (ca. 90%) 1.4 GeV, 2 uA protons delivered by the PS Booster to the ISOLDE target, which would normally end up in the beam dump. After irradiation, the MEDICIS target is transported back to an offline isotope mass separator, where the produced isotopes are mass separated, and are then collected. The required medical radioisotopes are later chemically separated in the class A laboratory. The radioisotopes are transported to partner hospitals for processing and preparation for medical use, imaging or therapy. Production of the isotopes is affected by the designs of the ISOLDE and MEDICIS targets. The MEDICIS target unit is a configurable unit, allowing for variations in target material as well as ion source for the production of selected medical radioisotopes. The energy deposition on both targets is simulated using the Monte Carlo code FLUKA, along with the in-beam production of some medical isotopes of interest. Diffusion and effusion efficiencies are then applied to estimate their production.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY017  
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WEZA02 The NICA Project at JINR ion, collider, detector, heavy-ion 2061
 
  • G.V. Trubnikov, A.V. Butenko, V.D. Kekelidze, H.G. Khodzhibagiyan, S.A. Kostromin, V.A. Matveev, I.N. Meshkov, A.O. Sidorin, A. Sorin
    JINR, Dubna, Moscow Region, Russia
  
  The physics program and the present status of the project of NICA collider, which is under construction at JINR (Dubna), are presented. The main goal of the project is to provide ion beams for experimental studies of hot and dense strongly interacting baryonic matter and spin physics. The proposed physics program concentrates on the search for possible manifestations of the phase transitions and critical phenomena in the energy region, where the excited matter is produced with maximal achievable net baryon density, and clarification of the origin of nucleon spin. The collider will provide heavy ion collisions in the energy range of √sNN=4/11 GeV at average luminosity of L=1·1027cm−2·s−1 for 197Au79+ nuclei and polarized proton collisions in energy range of √sNN=12/27 GeV at luminosity of L≥1032cm−2·s-1. The key issue of the accelerator complex is application of sophisticated beam accumulation schemes and both stochastic and electron cooling methods. Strong space-charge effects in the collider arise a challenge to its optics and application of novel methods of beam stability maintenance.  
slides icon Slides WEZA02 [17.880 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEZA02  
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WEPMW017 Ion Beam Polarization Dynamics in the 8 Gev Booster of the Jleic Project at Jlab proton, polarization, resonance, quadrupole 2460
 
  • V.S. Morozov, Y.S. Derbenev, F. Lin, Y. Zhang
    JLab, Newport News, Virginia, USA
  • Y. Filatov
    MIPT, Dolgoprudniy, Moscow Region, Russia
  • A.M. Kondratenko, M.A. Kondratenko
    Science and Technique Laboratory Zaryad, Novosibirsk, Russia
  
  Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contracts No. DE-AC05-06OR23177 and DE-AC02-06CH11357.
In the Jefferson Lab's Electron-Ion Collider (JLEIC) project, an injector of polarized ions into the collider ring is a superconducting 8 GeV booster. Both figure-8 and racetrack booster versions were considered. Our analysis showed that the figure-8 ring configuration allows one to preserve the polarization of any ion species during beam acceleration using only small longitudinal field with an integral less than 0.5 Tm. In the racetrack booster, to preserve the polarization of ions with the exception of deuterons, it suffices to use a solenoidal Siberian snake with a maximum field integral of 30 Tm. To preserve deuteron polarization, we propose to use arc magnets for the race-track booster structure with a field ramp rate of the order of 1 T/s. We calculate deuteron and proton beam polarizations in both the figure-8 and racetrack boosters including alignment errors of their magnetic elements using the Zgoubi code. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW017  
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WEPMY002 SLRI Beam Test Facility Development Project electron, target, synchrotron, detector 2539
 
  • K. Kittimanapun, N. Chanlek, S. Cheedket, N. Juntong, P. Klysubun, S. Krainara, K. Sittisard, S. Supajeerapan
    SLRI, Nakhon Ratchasima, Thailand
  
  Funding: This work is supported by the National Science and Technology Development Agency (NSTDA) under contract FDA-C0-2558-855-TH.
The SLRI Beam Test Facility (SLRI BTF) is a part of the future upgrades of the SLRI accelerator complex. Upon completion, SLRI BTF will be able to produce electron test beams with the number of electrons ranging from a few to several thousand electrons per bunch. The project is divided into three stages based on the complexity of the electron reduction setups. The simple setup for the initial stage has been implemented without any modifications to the current high-energy beam transport line (HBT) while additional elements together with an existing 4-degree dipole are required for the short-term setup in the second stage. For the last stage, a new dedicated transfer line equipped with a high-resolution energy selector will be constructed to direct the electron beam from the HBT beam line to an experimental station. This project aims to provide a defined number of electrons with maximum energy of 1 GeV for calibration and testing of high energy detectors as well as other beam diagnostic instrumentations. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMY002  
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WEPOW001 Sirius Status Report storage-ring, vacuum, dipole, kicker 2811
 
  • A.R.D. Rodrigues, F.C. Arroyo, O.R. Bagnato, J.F. Citadini, R.H.A. Farias, J.G.R.S. Franco, L. Liu, S.R. Marques, R.T. Neuenschwander, C. Rodrigues, F. Rodrigues, R.M. Seraphim, O.H.V. Silva
    LNLS, Campinas, Brazil
  
  Sirius is a Synchrotron Light Source Facility based on a 4th generation low emittance storage ring that is presently under construction in Campinas, Brazil. During the last year, accelerator activities concentrated on R&D of the various subsystem components. However, the number of components under production or already delivered is also increasing according to planning. The building construction started in the beginning of 2015 and machine commissioning is expected to start mid 2018. In this paper we report on the present status of the project with emphasis on the last year activities.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW001  
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WEPOW007 Status and Prospects of the BESSY II Injector System injection, storage-ring, linac, synchrotron 2826
 
  • T. Atkinson, W. Anders, P. Goslawski, A. Jankowiak, F. Kramer, P. Kuske, D. Malyutin, A.N. Matveenko, A. Neumann, M. Ries, M. Ruprecht, A. Schälicke, T. Schneegans, D. Schüler, P.I. Volz, G. Wüstefeld
    HZB, Berlin, Germany
  • H.G. Glass
    BESSY GmbH, Berlin, Germany
  
  The BESSY II injector system consists of a 50 MeV Linac, installed in preparation for TopUp operation, and a 10 Hz fast-ramping booster synchrotron. The system provides injection efficiencies into the BESSY II storage ring well above 90 % . This contribution reports on the present status, measurements of energy acceptance and other essential beam parameters as well as studies on coupled-bunch-by-bunch instability. Requirements for BESSY-VSR and possible upgrade scenarios are discussed.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW007  
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WEPOW017 Recent Progress on the Development of Iranian Light Source Facility (ILSF) Project quadrupole, sextupole, storage-ring, synchrotron 2861
 
  • J. Rahighi, F.A. Ahmad Mehrabi, E. Ahmadi, S. Ahmadian, M. Akbari, S. Amiri, J. Dehghani, R. Eghbali, S. Fatehi, H. Ghasem, A. Gholampour, M. Jafarzadeh, P. Khodadoost, M. Moradi, M. Rahimi, M. Razazian, A. Sadeghipanah, F. Saeidi, E. Salimi, Kh.S. Sarhadi, O. Seify, M.Sh. Shafiee, D. Shirangi, E.H. Yousefi
    ILSF, Tehran, Iran
  
  The Iranian Light Source Facility Project (ILSF) is a 3rd generation light source with energy of 3 GeV, a full energy injector and a 150 MeV linac as pre-injector. The stored beam current in top up mode is 400 mA, the beam lifetime is about 7 h, and the average pressure of vacuum chamber is approximately 1.33 × 10-7 Pa (1 nTorr). The ILSF storage ring has been designed to be competitive in the future operation years. Some prototype accelerator components such as high power solid state radio frequency amplifiers, LLRF system, thermionic RF gun, storage ring H-type dipole and quadruple magnets, Hall probe system for magnetic measurement and highly stable magnet power supplies have been constructed in ILSF R&D laboratory.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW017  
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WEPOW024 Commissioning of SESAME Booster injection, septum, quadrupole, extraction 2880
 
  • M. Attal, I.A. Abid, T.H. Abu-Hanieh, H. Al-Mohammad, M.A. Al-Najdawi, D.S. Foudeh, A. Hamad, E. Huttel, A. Ismail, S.Kh. Jafar, F. Makahleh, M. Mansouri Sharifabad, K. Manukyan, I. Saleh, N.Kh. Sawai, M.M. Shehab
    SESAME, Allan, Jordan
  
  Commissioning of the 800 MeV booster of SESAME light source started in December 2013. The 38.4 m circumference booster is a part of SESAME injector which includes also a 20 MeV classical microtron as a pre-injector that is in operation since 2012. The main results and experience obtained during the commissioning period are reported in this paper.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW024  
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WEPOW026 Recent Physical Studies for the HEPS Project injection, lattice, emittance, sextupole 2886
 
  • G. Xu, Z. Duan, Y.Y. Guo, D. Ji, Y. Jiao, X.Y. Li, Y.M. Peng, Q. Qin, J. Qiu, S.K. Tian, J.Q. Wang, N. Wang, Y. Wei, C.H. Yu
    IHEP, Beijing, People's Republic of China
  
  The High Energy Photon Source (HEPS), a kilometre- scale storage ring light source, with a beam energy of 5 to 6 GeV and transverse emittances of a few tens of pm.rad, is to be built in Beijing and now is under design. In this paper we reported the progress and status of the physical studies for the HEPS project, covering issues of storage lattice design and optimization, booster design, injection design, collective effects, error study, insertion device effects, longitudinal dynamics, etc.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW026  
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WEPOW033 Commissioning of the Alba Injector With 67 Mev Single Klystron Linac linac, quadrupole, klystron, dipole 2905
 
  • G. Benedetti, U. Iriso, J. Marcos, Z. Martí, V. Massana, R. Muñoz Horta, F. Pérez, M. Pont
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  The 3 GeV ALBA booster normally accelerates an injected beam of 110 MeV, delivered by the linac operating with two independent klystrons. On 2014, the linac waveguide system was upgraded and commissioned to allow operating with either klystron and providing a reduced beam energy of 67 MeV. The commissioning of the booster to capture the beam at a reduced energy and ramp it up to 3 GeV has required a long set-up process of the magnets at 67 MeV beam energy. Due to the dominant effect of the remnant magnetic field in the low energy regime, the scaling of the magnet settings at the beginning of the ramp did not allow to capture the beam, and more precise calibrations were measured on spare quadrupoles to ease its fine tuning. The effect of higher eddy currents induced when the dipoles start ramping, combined with the lower beam rigidity, has been also an issue to tune the dipole waveforms for the 67 MeV - 3 GeV cycle. The encountered problems and their solutions to commission the ALBA injector in this new mode of operation are here presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW033  
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WEPOW058 Top-off Tests and Controls Optimization injection, operation, controls, timing 2982
 
  • G.M. Wang, M.A. Davidsaver, A.A. Derbenev, R.P. Fliller, Y. Hu, T.V. Shaftan
    BNL, Upton, Long Island, New York, USA
  
  Funding: DOE No.DE-AC02- 98CH10886
The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. As in many other light sources, top-off injection is considered as a standard operation mode resulting in more stable beam intensity to minimize heat load variation on the beamline optics. Top off injection specifications include maintaining the stored beam current within 0.5% and the bunch to bunch charge variation within 20% bands. To make the top off commissioning smooth and efficient, a virtual machine model based on the measured beam properties was developed. The model helped to study robustness of this application operating under different conditions and optimize the input parameters. Once tested the model was transitioned to beam commissioning. To make the beam tests more efficient, the beam lifetime was controlled by adjusting RF voltage and scrapers. In this paper, we'll share the experience from the test stage to machine implementation of the top-off controls. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW058  
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WEPOY054 A Matlab Interface Package for Elegant Simulation Code lattice, quadrupole, space-charge, betatron 3117
 
  • V.V. Smaluk, T.V. Shaftan, G.M. Wang
    BNL, Upton, Long Island, New York, USA
  
  Funding: Work supported by DOE contract DE-AC02-98CH10886
A Matlab interface package for Elegant simulation code is under development. This package combines advantages of Elegant, which is one of the most advanced codes for accelerator simulations, with advantages of useful and effective Matlab functions for data processing, analysis, optimization, and real-time machine control using Maltab Middle Layer. A number of functions have been already developed: calculation of lattice parameters and Twiss functions, linear and high-order chromaticity, amplitude-dependent tune shifts, modification of lattice elements, correction of betatron tunes and chromaticity, a set of functions for graphic representation. These functions have been successfully used at NSLS-II for tracking and turn-by-turn simulations near the half-integer resonance, for maximizing tunability and dynamic aperture of NSLS-II Booster, and for calculating limits of top-up Booster energy interlock. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY054  
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THPMB018 Candidate Booster Design for the HEPS Project emittance, sextupole, lattice, injection 3263
 
  • Y.M. Peng, Y.Y. Guo, Y. Jiao, Y. Wei, G. Xu
    IHEP, Beijing, People's Republic of China
  
  The High Energy Photon Source (HEPS), with trans-verse emittances of a few tens of pm.rad, is to be built in the suburbs of Beijing, China. The HEPS booster is a 2 Hz electron synchrotron. It accelerates electron bunches from a 300 MeV linac to a final energy of 6 GeV, and then extracts and injects them into the stor-age ring. We have made a candidate booster design, with a circumference of about 432 m and a natural emittance of about 4 nm.rad at 6GeV, which will be located in a separate tunnel. This lattice has a four-fold symmetry. Each super-period is composed of 13 iden-tical cells and two matching cells. The lattice design and optimization and other considerations are present-ed in a detail.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB018  
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THPMB056 Witness Beam Production with an RF Gun and a Travelling Wave Booster Linac for AWAKE Experiment at CERN emittance, linac, gun, proton 3378
 
  • O. Mete Apsimon, G.X. Xia
    UMAN, Manchester, United Kingdom
  • R. Apsimon, G. Burt
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • S. Döbert
    CERN, Geneva, Switzerland
  
  Funding: This work is supported by the Cockcroft Institute Core Grant and STFC.
AWAKE is a unique experiment that aims to demonstrate the proton driven plasma wakefield acceleration. In this experiment, proton bunches from the SPS accelerator will be injected into a 10m long pre-formed plasma section to form wakefields of hundreds MV/m to several GV/m. A second beam, e.g., the witness beam, will be injected after the protons in an appropriate phase to gain energy from the wakefields. A photo-injector will be utilised to deliver this second beam. It consists of an S-band RF gun followed by a meter long accelerating travelling wave structure (ATS). The RF gun was recuperated from existing PHIN photo-injector. A 3D RF design of the ATS was done by using the CST code and the field maps produced were used to characterise the electron beam dynamics under space charge effect by using the PARMELA code. The impact of the mechanical errors on the beam dynamics were investigated. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB056  
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THPMR002 Optics Corrections with LOCO in the Fermilab Booster lattice, optics, sextupole, quadrupole 3385
 
  • C.-Y. Tan, L.R. Prost, K. Seiya, A.K. Triplett
    Fermilab, Batavia, Illinois, USA
  
  Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
The optics of the Fermilab Booster has been corrected with LOCO (Linear Optics from Closed Orbits). However, the first corrections did not show any improvement in capture efficiency at injection. A detailed analysis of the results showed that the problem lay in the MADX optics file. Both the quadrupole and chromatic strengths were originally set as constants independent of beam energy. However, careful comparison between the measured and calculated tunes and chromatcity show that these strengths are energy dependent. After the MADX model was modified with these new energy dependent strengths, the LOCO corrected lattice has been applied to Booster. The effect of the corrected lattice will be discussed here. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR002  
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THPMR011 Injection Dynamics for Sirius Using a Nonlinear Kicker injection, kicker, storage-ring, accumulation 3406
 
  • L. Liu, X.R. Resende, A.R.D. Rodrigues, F. H. de Sá
    LNLS, Campinas, Brazil
  
  The concept of injection using a single nonlinear kicker has been proposed and tested in several existing storage rings with reduction in the stored beam oscillations during the accumulation process. Despite the good results, this scheme has not yet been adopted for routine operation in these machines due to the reduced injection efficiency. The main cause for reduction in efficiency is precisely the nonlinearity of the kick at the injected beam position and the generally large injected beam size. In this paper we study the injection dynamics in the Sirius storage ring where beam accumulation is based only on the use of a nonlinear kicker. The whole injection system has been optimized from the start for high injection efficiency.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR011  
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THPMR042 Design Guidelines for the Injector Complex of the FCC-ee collider, injection, linac, optics 3488
 
  • Y. Papaphilippou, F. Zimmermann
    CERN, Geneva, Switzerland
  • M. Aiba
    PSI, Villigen PSI, Switzerland
  • K. Oide
    KEK, Ibaraki, Japan
  • L. Rinolfi
    JUAS, Archamps, France
  • D.B. Shwartz
    BINP SB RAS, Novosibirsk, Russia
  
  The design of the injector of the FCC-ee, a high-luminosity e+/e− circular collider of 100 km in the Geneva area, is driven by the required particle flux for ring filling or top-up and for a variety of energies, from 45.5 to 175 GeV. In this paper, a set of parameters of the injector complex is presented, fulfilling the collider needs for all running scenarios. In particular, the challenges of the booster ring design are detailed, focusing on issues of optics, layout, low bending fields, injection schemes to the collider for maximizing transfer efficiency and synchrotron radiation handling.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR042  
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THPMW004 Conceptual Design for the HEPS Power Supply System power-supply, controls, interface, storage-ring 3540
 
  • F. Long, Y.P. Liu, X. Qi, Z.H. ZhenHua
    IHEP, Beijing, People's Republic of China
  
  The High Energy Photon Source (HEPS) requires more than 1600 power supplies with various kinds of power rating. The power supply system includes power supplies for the Booster, Transport, and Storage Ring. The power supply for the Booster is based on 2Hz sinusoidal dynamic current output with 1000ppm current tracking requirement. And the power supply performance requirements of 10ppm long-term current stability are much more rigorous than commercial power supplies. The paper shows the conceptual design of the power supply system for the HEPS and possible solutions to critical technical challenges.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW004  
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THPMW015 A Digtal Regulation Controller Prototype for the TPS Booster Power Supplies controls, power-supply, dipole, feedback 3570
 
  • B.S. Wang, Y.-C. Chien, Y.T. Li, C.Y. Liu, K.-B. Liu, Y.S. Wong
    NSRRC, Hsinchu, Taiwan
  
  In the newly built TPS (Taiwan Photon Source), the AC power supplies of the Booster ring are required to operate in DC and AC mode with accuracy. Especially in AC mode, during the booster ramping process, the current ramping profiles of the Quadruple Magnets have to track that of the Dipole AC power supply with precise phase and amplitude to maximize the beam energy boost efficiency. At present, analog current commands for all the booster power supplies with relative phase and amplitude information are generated externally. The current ramping profiles are pre-calculated and calibrated in a centralized manner. In this paper, an auto-calibration process using Curve-Fitting algorithm is proposed. In the new process, the current ramping profile data is first stored digitally in each power supply and then outputted to each power supply with a synchronous trigger signal in hope to eliminate the signal integrality problem inherent in analog signals , so that the beam energy boost up could be more reliable and efficient. The new proposed method has been implemented and tested successfully and will be applied to the booster power supplies to test its performance in the future.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW015  
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THPMW016 Dipole Power Supply for the Storage Ring of Taiwan Photon Source power-supply, dipole, storage-ring, controls 3573
 
  • C.Y. Liu, Y.-C. Chien, K.-B. Liu, B.S. Wang, Y.S. Wong
    NSRRC, Hsinchu, Taiwan
  
  The performance of the TPS dipole power supply for the dipole magnets in the TPS storage ring is important. As the output current of the power supply follows the beam current for operation at 3 GeV, the power supply must deliver enormous energy to the dipole magnets. The target energy corresponds to 700 A at 800 V. The dipole supply for the TPS storage ring is a unipolar switching power supply, also called a bulk power supply. The TPS dipole power supply modulates the output current regulated by the PWM signal. The switching device is an IGBT module working at frequency 2 kHz. A PID controller and a DCCT are used for feedback control of the output current. We obtained an optimal control gain with long-term stability of the output current under 10 ppm. The performance of the TPS storage ring dipole supply can thus satisfy the TPS requirement. The beam current generates 3 GeV in the TPS ring. This paper reports the excellent results.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW016  
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THPMY014 Study of the Non-evaporable Ti-Zr-V Films Grown on Different Materials vacuum, electron, experiment, synchrotron-radiation 3682
 
  • L.H. Wu, C.M. Cheng, Y.T. Huang, S.Y. Perng, I.C. Sheng, C. Shueh
    NSRRC, Hsinchu, Taiwan
  
  The non-evaporable (NEG) Ti-Zr-V films were coated on the different vacuum-chamber materials, including the extruded aluminum samples (Al), the extruded seamless stainless steel samples (S.S.), CuCrZr alloys, and oxygen-free copper (OFC) plates. The NEG films were fabricated by using the direct current (DC) sputtering method. The secondary electron microscopy images showed that the morphology of NEG films was different on these various substrates. The thermal analysis (TA) presented that exothermic reaction happened by heating the samples.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY014  
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THPMY015 Measurement of the Pressure in the TPS Booster Ring vacuum, electron, storage-ring, ion 3685
 
  • C.M. Cheng, C.K. Chan, G.-Y. Hsiung, Y.T. Huang, I.C. Sheng, L.H. Wu, I.C. Yang
    NSRRC, Hsinchu, Taiwan
  
  The booster ring of Taiwan Photon Source (TPS) is designed to provide full energy injection 3 GeV ramped up from 150 MeV with a small beam emittance. It is a synchrotron accelerator of circumference 496.8 m. The vacuum chamber through the magnets is made of thin stainless-steel tube extruded to an elliptical cross section of inner diameters 35 mm and 20 mm, and thickness 0.7 mm. The other chambers have standard 35CF round tube. The vacuum system was baked in the first installation. Because the residual stress of the stainless-steel elliptical tubing caused the magnetic field to become unstable, all elliptical tubing was removed for annealing to proceed, and reinstalled without baking. The ultimate pressure and data for the residual gas are shown as follows.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY015  
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THPMY033 Vibration Evaluation for Deionized Water Pumps in TPS operation, coupling, alignment, status 3731
 
  • Y.-H. Liu, C.S. Chen, Y.-C. Chung
    NSRRC, Hsinchu, Taiwan
  
  The purpose of this paper is to evaluate the vibration level and spectrum for TPS deionized water pumps. The utility systems started to operate from the beginning of 2014, some of deionized water pumps produced higher vibration level and noise during operation. The possibly reason could be not appropriated installation and commission test. In order to figure out the status of these deionized water pumps, the vibration analysis become needed. After vibration test, the booster(BO) and copper(CU) deionized water pump systems generate higher vibration level. According to the vibration test results, the pump is repair and maintain. Although there is some problems for TPS deionized water pumps, the vibration test is still one important way to maintain utility systems. The utility systems could prevent malfunction through regular vibration inspection.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY033  
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THPOR011 Design study of CEPC Alternating Magnetic Field Booster dipole, sextupole, dynamic-aperture, emittance 3791
 
  • T.J. Bian, S. Bai, X. Cui, J. Gao, D. Wang, Y. Wang, M. Xiao, C. Zhang
    IHEP, Beijing, People's Republic of China
  • Y. Cai
    SLAC, Menlo Park, California, USA
  • M. Koratzinos
    DPNC, Genève, Switzerland
  • F. Su
    Institute of High Energy Physics (IHEP), People's Republic of China
  
  CEPC is next generation circular collider proposed by China. The design of the full energy booster ring of the CEPC is especially challenging. The ejected beam energy is 120GeV but the injected beam only 6GeV. In a conventional approach, the low magnetic field of the main dipole magnets creates problems. We propose to operate the booster ring as a large wiggler at low beam energies and as a normal ring at high energies to avoid the problem of very low dipole magnet fields.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOR011  
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THPOR018 Comissioning of Upgraded VEPP-2000 Injection Chain injection, positron, electron, linac 3811
 
  • D.E. Berkaev, A.V. Andrianov, K.V. Astrelina, V.V. Balakin, A.M. Barnyakov, O.V. Belikov, M.F. Blinov, D.V. Bochek, D. Bolkhovityanov, F.A. Emanov, A.R. Frolov, K. Gorchakov, Ye.A. Gusev, A.S. Kasaev, E. Kenzhbulatov, I. Koop, I.E. Korenev, G.Y. Kurkin, N.N. Lebedev, A.E. Levichev, P.V. Logatchov, A.P. Lysenko, D.A. Nikiforov, V.P. Prosvetov, Yu. A. Rogovsky, S.L. Samoylov, A.I. Senchenko, P.Yu. Shatunov, Y.M. Shatunov, D.B. Shwartz, A.A. Starostenko, I.M. Zemlyansky, Yu.M. Zharinov
    BINP SB RAS, Novosibirsk, Russia
  • F.A. Emanov, Yu. A. Rogovsky, A.I. Senchenko, A.A. Starostenko
    NSU, Novosibirsk, Russia
  
  The upgrade of VEPP-2000 e+e− collider injection chain includes the connection to BINP Injection Complex (IC) via newly constructed transfer line K-500 as well as upgrade of the booster synchrotron BEP to the energy of 1 GeV. Modernization has started in the middle of 2013 and now the electron and positron beams with highly increased production rate together with top-up injection from BEP are ready to feed VEPP-2000 ring and provide design luminosity at the whole energy range limited only by beam-beam effects. The design and operation experience of IC damping ring, 250 m transfer channel and booster BEP dealing with 2.6 T magnets at top energy will be presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOR018  
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THPOR037 TW-Structure Design and E-Field Study for CLIC Booster Linac linac, cavity, positron, electron 3868
 
  • E. Darvish Roknabadi
    IPM, Tehran, Iran
  • S. Döbert
    CERN, Geneva, Switzerland
  
  Using the SUPERFISH code we present a design for a traveling wave (TW) structure of the Booster Linac for CLIC. The structure, consisting of thirty asymmetric cells attached to the beam pipes at two ends, works in 2Pi/3 operating mode at working frequency 2 GHz. The RF field transmitted through the designed cavity is prepared in an RF field data file to be used in the PARMELA code. We will then compare the resultant output PARMELA field with that of the ideal RF field which obtained from the usual method for a traveling wave structure.
* Based on CLIC Note 1051, 2015 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOR037  
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THPOW032 Experimental Test on the TPS Booster Injection Scheme Exploration and the Associated Bunch Train Analysis injection, kicker, septum, operation 4008
 
  • H.-P. Chang, C.L. Chen, C.-S. Fann, K.T. Hsu, S.Y. Hsu, K.-K. Lin, K.L. Tsai
    NSRRC, Hsinchu, Taiwan
  
  In order to explore the tuning range of injection septum and kicker for TPS booster operation, an experimental test on the designed injection scheme has been performed. Tuning of these injection units is based on the top-up operation process for storage ring vacuum cleaning purpose. It is set for a fast beam accumulation in the storage ring where the stored beam variation range is selected for efficient operation consideration. The measurement results of booster beam current variation while tuning of injection septum and kicker are presented. A preliminary analysis concerning the observation of deteriorated phase space acceptance in the TPS booster is given in this report. This study also includes an effort to extend the present available operation bunch train for TPS booster. It shows that the increase of the booster beam current by bunch train tuning indicates an upper bound of about 400 ns.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW032  
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THPOW034 TLS Booster Injection Scheme Exploration septum, injection, kicker, electron 4016
 
  • H.H. Chen, H.-P. Chang, H.C. Chen, S.J. Huang, C.H. Kuo, A.P. Lee, J.A. Li, K.-K. Lin, Y.K. Lin
    NSRRC, Hsinchu, Taiwan
  
  In this paper, the booster injection efficiency and the parameter working range related to key components in-cluding septum magnet and kicker magnet for Taiwan Light Source (TLS) injector operation are introduced. Booster injection scheme for different lattice is explored by machine study plan using injector property. The study result may be used by the operator as booster injection parameter fine tuning reference. It is also helpful for the advanced injection scheme exploration.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW034  
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THPOW050 Upgrade of Septum Magnets of the Transfer Line in TPS septum, injection, power-supply, simulation 4057
 
  • C.S. Yang, C.-H. Chang, Y.L. Chu, J.C. Huang, C.-S. Hwang, J.C. Jan, F.-Y. Lin
    NSRRC, Hsinchu, Taiwan
  
  Taiwan Photon Source (TPS) is a 3-GeV light source. The full current of the storage beam and commissioning of insertion devices are still in progress. An improved injection between the booster ring (BR) and the storage ring (SR) was implemented to increase the efficiency of injection and the reliability of the electrical parts. A DC septum (length 0.8 m) was replaced with an AC septum (length 1 m, type C) to decrease the leakage field and to relax the loading of the power supply. Mapping the field with mu-metal shielding was also implemented to diminish the leakage field from the AC septum. The lattice of the transfer line between the booster ring and the storage ring, BTS, was also rearranged to meet the new injection requirements. The performance of the AC septum with mu-metal shielding and the upgrade of the BTS lattice are discussed in this paper.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW050  
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THPOY030 Dependability Studies for CERN PS Booster RF System Upgrade electronics, PLC, interlocks, operation 4159
 
  • O. Rey Orozko, A. Apollonio, M. Jonker, M.M. Paoluzzi
    CERN, Geneva, Switzerland
  
  Radio frequency systems are a vital part of almost all accelerators. The request for a higher beam bright-ness from the injector chain of CERN's Large Hardon Collider, as demanded by the future High-Luminosity program, has motivated, among many other upgrades, the construction of new RF equipment in the PS Boost-er. Because availability and reliability have an im-portant impact on the luminosity production in a col-lider environment, dependability studies have been performed on the new design of the RF system assum-ing different maintenance strategies. This paper will present the model, made with the commercial software Isograph, for dependability studies. In addition, a comparative study will be presented between the re-sults obtained from Isograph and from an analytical analysis.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY030  
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