Keyword: heavy-ion
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MOODB201 Proton-nucleus Collisions in the LHC luminosity, injection, proton, ion 49
 
  • J.M. Jowett, R. Alemany-Fernandez, P. Baudrenghien, D. Jacquet, M. Lamont, D. Manglunki, S. Redaelli, M. Sapinski, M. Schaumann, M. Solfaroli Camillocci, R. Tomás, J.A. Uythoven, D. Valuch, R. Versteegen, J. Wenninger
    CERN, Geneva, Switzerland
 
  Following the high integrated luminosity accumulated in the first two Pb-Pb collision runs in 2010 and 2011, the LHC heavy-ion physics community requested a first run with p-Pb collisions. This almost unprecedented mode of collider operation was not foreseen in the baseline design of the LHC whose two-in-one magnet design imposed equal rigidity and, hence, unequal revolution frequencies, during injection and ramp. Nevertheless, after a successful pilot physics fill in 2012, the LHC provided 31 nb-1 of p-Pb luminosity per experiment, at an energy of 5.02 TeV per colliding nucleon pair, with several variations of the operating conditions, in early 2013. Together with a companion p-p run at 2.76 TeV, this was the last physics before the present long shutdown. We summarise the beam physics, operational adaptations and strategy that resulted in extremely rapid commissioning. Finally, we give an account of the progress of the run and provide an analysis of the performance.  
slides icon Slides MOODB201 [6.547 MB]  
 
MOPME059 R&D of a Beam Position Monitor for RISP linac, impedance, ion, pick-up 607
 
  • E.-S. Kim
    KNU, Deagu, Republic of Korea
  • A. Heo
    Kyungpook National University, Daegu, Republic of Korea
  • H.K. Park
    CHEP, Daegu, Republic of Korea
 
  We have investigated on the R&D of stripline beam position monitor for the heavy-ion accelearator at Korea. We present the detailed design and fabrications on the beam position monitor in superconducting linac that the beam is accelerated to 200 MeV/u.  
 
MOPWA015 The Control Strategy Research on Two Kinds of Topological Pulse Power Supply power-supply, controls, pulsed-power, quadrupole 693
 
  • C.F. Shi, D.Q. Gao, Y.Z. Huang, H.H. Yan, Z.Z. Zhou
    IMP, Lanzhou, People's Republic of China
 
  This paper introduces a kind of pulsed power supply at HIRFL-CSR,analyzes the ripple and current error of the quadrupole magnet power supply in the operation process, and gives a two-stage topology of pulsed power supply. The control method is simulinked and the results show that the new one can make up for the deficiencies of the existing pulse power supply and the main circuit structure and control method are feasible.  
 
MOPWO006 Eigenmode Computation for the GSI SIS18 Ferrite Cavity cavity, resonance, ion, synchrotron 894
 
  • K. Klopfer, W. Ackermann, T. Weiland
    TEMF, TU Darmstadt, Darmstadt, Germany
 
  Funding: Supported by GSI
At the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt the heavy-ion synchrotron SIS18 is operated to further accelerate stable nuclei of elements with different atomic numbers. Two ferrite-loaded cavity resonators are installed within this ring. During the acceleration phase their resonance frequency has to be adjusted to the revolution frequency of the heavy-ions to reflect their increasing speed. To this end, dedicated biased ferrite-ring cores are installed inside the cavities for a broad frequency tuning. By properly choosing a suited bias current, the differential permeability of the ferrite material is modified, which finally enables to adjust the eigenfrequency of the resonator system. Consequently, the actual resonance frequency strongly depends on the magnetic properties of the ferrites. The goal of the current study is to numerically determine the lowest eigensolutions of the GSI SIS18 ferrite-loaded cavity. For this purpose, a new solver based on the Finite Integration Technique has been developed.
 
 
TUXB101 Status of the FAIR Facility ion, antiproton, target, storage-ring 1085
 
  • O.K. Kester
    GSI, Darmstadt, Germany
 
  The unique facility for Antiproton and Ion Research – FAIR will deliver stable and rare isotope beams covering a huge range of intensities and beam energies. In addition, the beams for the experiments will have highest beam quality for a cutting edge physics program. Therefore a unique accelerator facility using cutting edge technology will be built until 2018. The challenges are heavy ion synchrotrons for highest intensities, antiproton and rare isotope production stations, high resolution separators and several storage rings where beam cooling can be applied. Here new kind of superconducting magnets, rf-systems, injection and extraction systems and beam diagnostics will be applied. As the construction of the FAIR facility and procurement has started, an overview of the designs, procurements status and infrastructure preparation will be provided.  
slides icon Slides TUXB101 [9.587 MB]  
 
TUPFI009 NICA project at JINR ion, collider, booster, luminosity 1343
 
  • G.V. Trubnikov, N.N. Agapov, E.D. Donets, V.V. Fimushkin, E.V. Gorbachev, A. Govorov, E.V. Ivanov, V. Karpinsky, V.D. Kekelidze, H.G. Khodzhibagiyan, A.D. Kovalenko, K.A. Levterov, V.A. Matveev, I.N. Meshkov, V.A. Mikhailov, V. Monchinsky, S. Romanov, N. Shurkhno, A.O. Sidorin, V. Slepnev, A.V. Smirnov, A. Sorin, N.D. Topilin
    JINR, Dubna, Moscow Region, Russia
  • O.I. Brovko, A.V. Butenko, E.E. Donets, A.V. Eliseev, O.S. Kozlov, A.V. Philippov, N.V. Semin, A. Tuzikov, V. Volkov
    JINR/VBLHEP, Moscow, Russia
 
  The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at JINR aimed to provide the collider experiments with ion-ion (Au79+) and ion-proton collisions at the energy range of 1-4.5 GeV/n and also the collisions of polarized proton-proton and deuteron-deuteron beams. Progress in the project realization is reported.  
 
TUPFI082 RHIC Performance for FY2012 Heavy Ion Run ion, luminosity, booster, feedback 1538
 
  • Y. Luo, J.G. Alessi, M. Bai, E.N. Beebe, J. Beebe-Wang, I. Blackler, M. Blaskiewicz, J.M. Brennan, K.A. Brown, D. Bruno, J.J. Butler, R. Connolly, T. D'Ottavio, K.A. Drees, A.V. Fedotov, W. Fischer, C.J. Gardner, D.M. Gassner, X. Gu, Y. Hao, M. Harvey, T. Hayes, L.T. Hoff, H. Huang, P.F. Ingrassia, J.P. Jamilkowski, N.A. Kling, M. Lafky, J.S. Laster, C. Liu, D. Maffei, Y. Makdisi, M. Mapes, G.J. Marr, A. Marusic, F. Méot, K. Mernick, R.J. Michnoff, M.G. Minty, C. Montag, J. Morris, C. Naylor, S. Nemesure, A.I. Pikin, P.H. Pile, V. Ptitsyn, D. Raparia, G. Robert-Demolaize, T. Roser, P. Sampson, J. Sandberg, V. Schoefer, C. Schultheiss, F. Severino, T.C. Shrey, K.S. Smith, S. Tepikian, P. Thieberger, D. Trbojevic, J.E. Tuozzolo, B. Van Kuik, G. Wang, M. Wilinski, A. Zaltsman, K. Zeno, S.Y. Zhang, W. Zhang
    BNL, Upton, Long Island, New York, USA
 
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
In the 2012 RHIC heavy ion run, we collided 96.4~GeV U-U ions and 100~GeV Cu-Au ions for the first time in RHIC. The new pre-injector with the electron-beam ion source (EBIS) was used to provide ions for RHIC ion collisions for the first time. By adding the horizontal cooling, the powerful 3-D stochastic cooling largely enhanced the luminosity. With the double bunch merging in the Booster and AGS, the bunch intensities of Cu and Au ions in RHIC surpassed their projections. Both PHENIX and STAR detectors reached their integrated luminosity goals for the U-U and Cu-Au collisions. In this article we review the machine improvement and performance in this run.
 
 
WEXB201 Intense Highly Charged Heavy Ion Beam Production ion, ion-source, electron, plasma 2077
 
  • T. Nakagawa
    RIKEN/RARF/CC, Saitama, Japan
 
  With increase of applications of heavy ions in the various fields, production of intense beam of highly charged heavy ions form the ion sources become more and more important. For example, ion sources are required to produce intense dc beams of the highly charged heavy ions for the accelerator facilities of radio isotope beam production and the intense short pulsed beams for injection into synchrotrons. Additionally, in these applications, the ion sources face several important matters to be improved for meeting the requirements, such as source lifetime, reliability, current stability, and beam emittance. For these purposes, several high performance ion sources, which include ECR ion sources, electron beam ion sources and laser ion sources, for production of the intense beam (dc and pulsed) of highly charged heavy ions have been constructed and achieved remarkable breakthrough in the past decade. In this contribution, state-of-the-art ion sources for production of intense highly charged heavy ion beams are reviewed. Future perspective is also discussed.  
slides icon Slides WEXB201 [4.395 MB]  
 
WEOAB201 Intense Beam Ion Sources Development at IMP ion, ion-source, ECR, proton 2082
 
  • L.T. Sun, Y. Cao, Y.C. Feng, J.Y. Li, Z.W. Liu, W. Lu, Q. Wu, Y. Yang, W.H. Zhang, X.Z. Zhang, Z.M. Zhang, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
  • D. Xie
    LBNL, Berkeley, California, USA
 
  To satisfy the HIRFL (Heavy Ion Research Facility in Lanzhou) accelerators’ requirement and the needs of several other future accelerator facilities, many high beam intensity ion sources have been developed at IMP. The ion sources include intense high charge state ion beam ECR ion sources and high intensity proton beam ECR or microwave sources. This paper will review the high charge state ion sources developed at IMP, especially the recently built fully superconducting ECR ion source SECRAL, and the other classical ion sources and all permanent magnet ion sources will also be discussed. The latest performance of the recently built intense proton ion source which can operate continuously at more than 65emA beam (after LEBT) and 50kV source high voltage for more than 150 hours with very few HV spark intervals will be especially presented in this paper.  
slides icon Slides WEOAB201 [3.381 MB]  
 
WEPWO025 Preliminary Design of 325 MHz Half-Wave Resonator cavity, simulation, proton, controls 2369
 
  • X.Y. Zhang, X. Chen, Z.Q. Li, Q. Ma, W.M. Pan, Y. Sun, G.W. Wang, Q.Y. Wang, B. Xu, G.Y. Zhao
    IHEP, Beijing, People's Republic of China
 
  Funding: This work is supported by the "Strategic Priority Research Program" of CAS.
The Half-Wave Resonator (HWR) has been widely used in proton and heavy ion accelerators, for it has particular advantages of accelerating low energy charged particles. Preliminary design of a 325 MHz β=0.12 superconducting HWR cavity has been proposed at Institute of High Energy Physics (IHEP). The basic geometric parameters choices of the cavity are based upon theoretical model and numerical calculation, and then the RF performances are optimized by extensive electromagnetic simulations. In this paper, the detailed mechanical analysis, frequency control, and the considerations for fabrication of the 325 MHz HWR cavity are also presented.
 
 
WEPWO028 10×10mm2 MgB2 Film Fabricated by HPCVD as a Candidate Material for SRF Cavit cavity, SRF, superconductivity, radio-frequency 2375
 
  • F. He, K.X. Liu, Z. Ni, D. Xie
    PKU, Beijing, People's Republic of China
  • Q. Feng
    Peking University, Beijing, People's Republic of China
 
  Magnesium diboride (MgB2) is one of candidate material for superconducting radio frequency cavities because of its good features: high transition temperature of ~39K and absence of weak links between grains which prevents other high-Tc superconducting materials, such as YBCO. Previous study of MgB2 are mainly focused on the films’ superconducting properties which are fabricated on Al2O3, SiC or some metal substrates with small scale less than 10×10 mm2. In this work we explore a technique to deposit clean and large-scale MgB2 films on Mo substrate, which is expected to provide a probable way to fabricate MgB2 thin-film cavities.. The measurement results show that its superconducting properties and mechanical behaviors are as good as those fabricated on small-scale metal substrates.  
 
WEPWO057 Update of SSR2 Cavities Design for Project X and RISP cavity, linac, cryomodule, simulation 2435
 
  • M. Merio, M.H. Awida, P. Berrutti, I.V. Gonin, T.N. Khabiboulline, D. Passarelli, Y.M. Pischalnikov, L. Ristori, N. Solyak, V.P. Yakovlev
    Fermilab, Batavia, USA
 
  Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
Single spoke resonators SSR2 (f=325 MHz) are under development at Fermilab. These cavities can meet requirements of Project X (FNAL) and RISP (Korea). The initial design of SSR2 cavities has been modified and optimized in order to satisfy the necessities of both projects. This paper will discuss the RF optimization for a single spoke resonator with a 50 mm beam pipe aperture and an optimal beta of 0.51. Further, the approach to the mechanical design of the cavity will be presented together with the proposed helium vessel. The latter is intended to guarantee a low He pressure sensitivity df/dp of the entire jacketed SSR2 and actively control the microphonics.
 
 
WEPEA061 The First LHC p-Pb run: Performance of the Heavy Ion Production Complex ion, proton, luminosity, injection 2648
 
  • D. Manglunki, M. E. Angoletta, H. Bartosik, G. Bellodi, A. Blas, M.A. Bodendorfer, T. Bohl, C. Carli, E. Carlier, S. Cettour Cave, K. Cornelis, H. Damerau, A. Findlay, S.S. Gilardoni, S. Hancock, J.M. Jowett, D. Kuchler, M. O'Neil, Y. Papaphilippou, S. Pasinelli, R. Scrivens, G. Tranquille, B. Vandorpe, U. Wehrle, J. Wenninger
    CERN, Geneva, Switzerland
 
  TThe first LHC proton-ion run took place in January-February 2013; it was the first extension to the collider programme, as this mode was not included in the design report. This paper presents the performance of the heavy ion and proton production complex, and details the issues encountered, in particular the creation of the same bunch pattern in both beams.  
 
THPEA003 Use of FPGA-based Configurable Electronics to Calibrate Cavities controls, synchrotron, LLRF, ion 3152
 
  • S. Schäfer, A. Klaus, H. Klingbeil, B. Zipfel
    GSI, Darmstadt, Germany
  • U. Hartel, H. Klingbeil
    TEMF, TU Darmstadt, Darmstadt, Germany
 
  At the GSI Helmholzzentrum für Schwerionen-forschung GmbH the accuracy requirements for synchrotron rf cavities have strongly increased in the last years, especially for multi-harmonic operation. For heavy-ion acceleration the amplitude and phase have to be well adjusted over a whole machine cycle. In order to compensate small deviations induced by low-level rf components (LLRF) and transmission lines in the control paths, a calibration electronic (CEL) with a characteristic map was developed. It is a real-time module which is based on modern FPGA (Field Programmable Gate Array) technology and adaptable to special cavities with various physical dependencies (e.g. attenuation, dispersion, temperature drift, aging etc.). The hardware and software architecture of this CEL module are presented here.  
 
THPEA019 A Method of Implementing HIRFL-CSR Chopper Controls controls, ion, storage-ring, target 3185
 
  • K. Gu, S. An, X.J. Liu, W. Zhang
    IMP, Lanzhou, People's Republic of China
 
  A method of implementing controls of chopper for HIRFL-CSR (Heavy Ion Research Facility of Lanzhou and Cooler Storage Rings) is introduced. This method is based on an ARM and DSP co-operation system. The control algorithm of this method is based on a data structure which is defined and implemented in the DSP module. Output data is created by the control algorithm and the actually pulse output is triggered by a timer which is achieved through a logic circuit actualized in a FPGA chip. The results show that the method is flexible and the control system matches the chopper regulating requirements.  
 
THPEA020 The Design for Presetting Data Automatically in HIRFL Power Supply Control System power-supply, controls, LabView, cyclotron 3187
 
  • X.J. Liu, Y. Chen, K. Gu, A. Shi, J.Q. Wu, F. Yang, W. Zhang
    IMP, Lanzhou, People's Republic of China
 
  This article introduces the structure of power supply in HIRFL(Heavy Ion Research Facility in Lanzhou) and designs a program which can preset power supply data automatically. We use Labview which is produced by NI Corporation to read Excel, access the Oracle database and send the generated instructions to power supply controllers. This program brings great convenience to physicists. It is used in SSC(Separated Sector Cyclotron) power supply system. The result shows that we can preset data quickly and accurately.  
 
THPFI054 Preliminary Comparison of the Response of LHC Tertiary Collimators to Proton and Ion Beam Impacts ion, proton, collimation, beam-losses 3412
 
  • M. Cauchi, R.W. Aßmann, A. Bertarelli, F. Carra, F. Cerutti, L. Lari
    CERN, Geneva, Switzerland
  • M. Cauchi, P. Mollicone
    UoM, Msida, Malta
  • L. Lari
    IFIC, Valencia, Spain
  • N.J. Sammut
    University of Malta, Information and Communication Technology, Msida, Malta
 
  The CERN Large Hadron Collider is designed to bring into collision protons as well as heavy ions. Accidents involving impacts on collimators can happen for both species. The interaction of lead ions with matter differs to that of protons, thus making this scenario a new interesting case to study as it can result in different damage aspects on the collimator. This paper will present a preliminary comparison of the response of collimators to proton and ion beam impacts.  
 
THPWO007 Advanced Superconducting CW Heavy Ion Linac R&D solenoid, cavity, linac, ion 3770
 
  • W.A. Barth, S. Mickat, A. Orzhekhovskaya
    GSI, Darmstadt, Germany
  • M. Amberg, K. Aulenbacher, V. Gettmann, S. Jacke
    HIM, Mainz, Germany
  • F.D. Dziuba, H. Podlech, U. Ratzinger
    IAP, Frankfurt am Main, Germany
 
  An advanced upgrade program has to be realized in the next years, such that enhanced primary beam intensities are available. For this a new sc 28 GHz full performance ECR ion source has to be established. Via a new low energy beam line an already installed new RFQ and an IH-DTL will provide for cw-heavy ion beams with high average beam intensity. It is foreseen to build a new cw-heavy ion-linac behind this high charge state injector. In preparation an advanced R&D program is defined: The first linac section comprising a sc CH-cavity embedded by two sc solenoids (financed by HIM and partly by HGF-ARD-initiative) as a demonstrator will be tested in 2014). After successfull testing an advanced cryomodule comprising up to 4 rf cavities is foreseen. First layout scenarios of this advanced test bench will be presented.  
 
THPWO010 Charge Stripping Tests of High Current Uranium Ion Beams with Methane and Hydrogen Gas Strippers and Carbon Foils at the GSI UNILAC stripper, ion, vacuum, target 3779
 
  • B. Schlitt, W.A. Barth, G. Clemente, L. Groening, M. Kaiser, B. Lommel, M.T. Maier, S. Mickat, J. Steiner, H. Vormann
    GSI, Darmstadt, Germany
 
  At the GSI UNILAC, a nitrogen gas stripper is routinely used for stripping of heavy ion beams at 1.4 MeV/u. Different approaches to optimize the stripping efficiency as well as different options to increase the ion charge states for delivery to SIS18 are being investigated. The existing gas stripper was operated with methane and hydrogen gas for stripping of high current uranium ion beams. The results as well as the limitations of these tests will be presented and will be compared to standard nitrogen operation of the gas stripper. In addition, newest results using differently prepared carbon stripping foils for the same ion beams will be reported.  
 
THPWO048 A CW High Charge State Heavy Ion RFQ for SSC-LINAC rfq, ion, cavity, simulation 3878
 
  • Y.R. Lu, J.E. Chen, S.L. Gao, G. Liu, Z. Wang, X.Q. Yan, K. Zhu
    PKU, Beijing, People's Republic of China
  • Y. He, L.P. Sun, J.W. Xia, Y.Q. Yang, X. Yin, Y.J. Yuan, Z.L. Zhang, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
 
  Funding: Supported by NSFC 11079001
To improve the super heavy ion beam injection efficiency and supply high current heavy ion beam for Separated Sector Cyclotron, A CW RFQ for heavy ion with high charge state has been designed and manufactured in the last two years. This RFQ will operate at 53.667MHz, will accelerate super heavy ions such as 238U34+ to 143keV/u. This paper will introduce the SSC-LINAC components, especially the RFQ beam dynamics, full length structure design, tuning and cooling method. Furthermore RF system and RF commissioning with full power for the RFQ power cavity will also be presented.
 
 
THPWO059 Beam Dynamics Design of the Main Accelerating Section with KONUS in the CSR-LINAC Proposal linac, emittance, DTL, rfq 3895
 
  • X.H. Zhang, H. Du, J.W. Xia, X. Yin, Y.J. Yuan
    IMP, Lanzhou, People's Republic of China
 
  The CSR-LINAC as the injector of the Cooling Storage Ring (CSR) has been proposed in Heavy Ion Research Facility in Lanzhou (HIRFL). The injection linac mainly consists of two Linacs, the Radio Frequency Quadrupole linac (RFQ) and the Drift Tube Linac (DTL). The KONUS (Kombinierte Null Grad Struktur) concept has been introduced to the drift tube linac section. In this paper, the re-matching of the main accelerating section will be finished in the 3.7MeV/u scheme and the new beam dynamics design updating to 7MeV/u will be shown. Through the beam re-matching, the relative emittance growth has been suppressed greatly along the linac. The KONUS structure is also adopted in the beam dynamics design that update from 3.7MeV/u to 7MeV/u and the good beam quality and transmission is shown.  
 
FRXBA01 Accelerator Technology - From Big Projects to Broad Application cavity, superconducting-magnet, superconducting-RF, ion 3986
 
  • A. Yamamoto
    KEK, Ibaraki, Japan
 
  Big projects with far-reaching technical goals seem to define technical parameters and test infrastructure performance. As such these are the 'drivers' of the technology and have a vital role and have application far beyond that originally foreseen. This talk will examine these links and propose strategies to best leverage them.  
slides icon Slides FRXBA01 [13.721 MB]  
 
FRXCB201 Overview of the World-wide RIB Facilities ion, linac, target, cyclotron 4000
 
  • O. Kamigaito
    RIKEN Nishina Center, Wako, Japan
 
  This presentation will cover the latest development, status and challenges of the world-wide RIB beam facilities.  
slides icon Slides FRXCB201 [7.665 MB]