IPAC2016 - List of Keywords (heavy-ion)

Paper	Title	Other Keywords	Page
MOPMR010	The Development of Scintillating Screen Detector for Beam Monitoring at the KHIMA Project	proton, ion, experiment, cyclotron	244
	S.Y. Noh, S.D. Chang, J.G. Hwang KIRAMS/KHIMA, Seoul, Republic of Korea G. Hahn, T.K. Yang KIRAMS, Seoul, Republic of Korea
	Funding: NRF-2014M2C3A1029534 It is important to measure the beam propeties such as position, size and intensity, when we control the medical beam qualities, So we developed the scintillation screen monitor used for beam profile monitoring and it will be installed at High Energy Beam Transport(HEBT) section to measure the beam parameters. This system consists of a terbium-doped gadolinium oxysulfide(Gd2O2S:Tb) phosphor screen and high speed charge coupled device camera. The CCD camera has the maximum 90 frame rate and 659 X 494 pixel resolution. This Camera is mounted at distance of 260mm from the center of the scintillation screen and with the angle of 45 degree to the scintillation screen which is mounted at the angle of 45 degree to the beam axis. The image analysis program was written in National Instruments LabVIEW using IMAQ driver. To reduce the image processing time, we optimized the prcessing flow and used LabVIEW built-in function. To evaluate this system, we measured the beam size and center position of the beam at KIRAMS on 50MeV cyclotron. In this paper, we present the manufacture of beam profile system based on a scintillating screen monitor and the in-beam test results of it.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR010
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MOPOY022	Further Upgrade Measures at New GSI cw-Linac Demonstrator Setup	solenoid, cavity, linac, ion	892
	M. Heilmann, W.A. Barth, S. Mickat, S. Yaramyshev GSI, Darmstadt, Germany M. Amberg, M. Basten, F.D. Dziuba, H. Podlech, U. Ratzinger, M. Schwarz IAP, Frankfurt am Main, Germany K. Aulenbacher IKP, Mainz, Germany K. Aulenbacher, W.A. Barth, V. Gettmann, S. Mickat, M. Miski-Oglu HIM, Mainz, Germany
	A new continuous wave (cw) linac is required to deliver high intensity heavy ion beams for Super Heavy Element (SHE) future experiments at GSI Darmstadt, Germany. The presented upgrade measures are dedicated to improve the performance of the cw demonstrator setup. The key component is a cryomodule comprising a superconducting (sc) 217 MHz Crossbar-H-mode (CH) cavity surrounded by two sc 9.3T solenoids with compensation coils. The solenoid coil is made of a Nb3Sn wire; and the compensation coils at both ends of the solenoid comprises NbTi wires. The distance between solenoid lense and CH cavity has to be optimized for ideal beam matching as well as for a minimum rest field inside the cavity below the critical magnetic field. The GSI High Charge State (HLI) injector has to deliver a heavy ion beam with an energy of 1.4 MeV/u. Longitudinal matching to the demonstrator is provided by two 10⁸.4 MHz cw room temperature λ/4 re-buncher cavity installed behind the HLI. In this paper electromagnetic simulations of the field optimization for the solenoids and the re-buncher cavities will be presented as well as first beam experiments at the beam transport line to the demonstrator cavity.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY022
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MOPOY023	Further Steps Towards the Superconducting CW-LINAC for Heavy Ions at GSI	linac, cavity, ion, target	896
	M. Schwarz, M. Basten, M. Busch, F.D. Dziuba, H. Podlech, U. Ratzinger, R. Tiede IAP, Frankfurt am Main, Germany W.A. Barth, V. Gettmann, M. Heilmann, S. Mickat, M. Miski-Oglu, S. Yaramyshev GSI, Darmstadt, Germany W.A. Barth, V. Gettmann, S. Mickat, M. Miski-Oglu HIM, Mainz, Germany
	Funding: Work supported by BMBF contr. No. 05P15RFRBA For future experiments with heavy ions near the coulomb barrier within the super-heavy element (SHE) research project a multi-stage R&D program of GSI, HIM and IAP is currently in progress. It aims at developing a superconducting (sc) continuous wave (cw) LINAC with multiple CH cavities as key components downstream the upgraded High Charge Injector (HLI) at GSI. The LINAC design is challenging, due to the requirement of intense beams in cw-mode up to a mass-to-charge-ratio of 6 while covering a broad output energy range from 3.5 to 7.3 MeV/u with minimum energy spread. The next milestone will be a full performance beam test of the first expansion stage at GSI, the Demonstrator, comprising two solenoids and a 15-gap CH cavity inside a cryostat.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY023
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MOPOY033	Design Study on an Injector RFQ for Heavy Ion Accelerator Facility	rfq, simulation, cavity, ion	928
	W. Ma, Y. He, L. Lu, X.B. Xu, Z.L. Zhang, H.W. Zhao IMP/CAS, Lanzhou, People's Republic of China
	A Low Energy Accelerator Facility (LEAF) was launched as a pre-research facility for High Intensity heavy ion Accelerator Facility (HIAF). The LEAF consists of a 2-mA U³⁴⁺ electron cyclotron resonance (ECR) type ion source with 300-kV extraction voltage, a low energy beam transport (LEBT) line with a multi-harmonic buncher (MHB), a CW 81.25MHz radio frequency quad-rupole (RFQ) accelerator which could accelerate heavy ions from 14 keV/u up to 500 keV/u, a triplet magnet for medium energy beam transport and an experimental platform for nuclear physics. After describing the selected structure, an octagonal cavity with π-mode stabilizing loop (PISL) type structure was adopted and simulated. In this paper, the detailed electromagnetic design and ther-mal simulation of the LEAF-RFQ will be reported.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY033
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MOPOY055	Technologies for Stabilizing the Dynamic Vacuum and Charge Related Beam Loss in Heavy Ion Synchrotrons	ion, vacuum, synchrotron, cryogenics	977
	P.J. Spiller, L.H.J. Bozyk, C. Omet, I. Pongrac, St. Wilfert GSI, Darmstadt, Germany
	With increasing the intensities of heavy ion beams in synchrotrons, charge related beam loss become more and more significant. In order to reduce space charge forces and to minimize the incoherent tune spread, the charge state of heavy Ions shall be lowered. Thus the cross section for charge related beam loss is further enhanced. For the FAIR project, GSI has developed a number of different technologies to stabilize the dynamic residual gas pressure and thereby to minimize charge related beam loss at high intensity heavy ion operation. Technologies suitable for such issues are, dedicated lattice structures, cold and warm ion catchers, NEG coated and cryogenic magnet chambers and cryo-adsorption pumps.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY055
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TUPMR022	Present Status and Future Plan of RIKEN RI Beam Factory	ion, cyclotron, acceleration, ion-source	1281
	O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, S. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa RIKEN Nishina Center, Wako, Japan
	Recent efforts concerning the accelerators of the RIKEN RI Beam Factory (RIBF) have been directed towards achieving higher heavy-ion beam intensities. As shown at the IPAC2014 conference, the intensities of these ion beams have improved significantly following the construction of the new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, development of the helium gas stripper, and upgrading of the bending power of the fRC. In this respect, this paper presents the subsequent upgrade programs conducted in the past two years, such as the development of a new charge stripper for uranium beam and a new acceleration scheme of krypton beam. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR022
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TUPMR056	Development and Investigation of Pulsed Pinch Plasmas for the Application as FAIR Plasma Stripper	plasma, ion, electron, cathode	1387
	M. Iberler, T. Ackermann, B. Bohlender, C. Hock, J. Jacoby, D. Mann, A. Puth, J. Wiechula IAP, Frankfurt am Main, Germany G. Ge GSI, Darmstadt, Germany
	Funding: This work is supported by BMBF The planed Facility for Ion Research (FAIR) is a new international accelerator laboratory at the GSI in Darm-stadt, Germany. The main topic at this facility is aimed to heavy ion research. The FAIR project in comparison to the existing facility GSI extends the research area by raising the energy of ion beams. After creation of the ion beam at the ion source the state charge is low. Therefor the demand for acceleration of the beam to the highest possible energy is a highly ionized charge state of the beam. For beam stripping to get higher charge state, the traditional tools are gas stripper and foil stripper [1, 2]. Hence Plasma is suggested to be a stripper medium. In Frankfurt are different kinds of Pinch Plasmas under investigation for Stripper. The constricting effect on the plasma or conductor is produced by the magnetic field pressure resulting from the current or by the Lorentz force produced by the current flowing in its own magnetic field. In addition to separate the high pressure discharge cham-ber of the accelerator a plasma window will be used [3]. This contribution gives an overview of the plasma proper-ties and shows first results of different beam times at the GSI.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR056
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TUPMR058	An Upgrade for the 1.4 MeV/u Gas Stripper at the GSI UNILAC	target, ion, injection, dipole	1394
	P. Scharrer, W.A. Barth, Ch.E. Düllmann, J. Khuyagbaatar, A. Yakushev HIM, Mainz, Germany W.A. Barth, M. Bevcic, Ch.E. Düllmann, L. Groening, K.P. Horn, E. Jäger, J. Khuyagbaatar, J. Krier, P. Scharrer, A. Yakushev GSI, Darmstadt, Germany Ch.E. Düllmann Johannes Gutenberg University Mainz, Institut of Nuclear Chemistry, Mainz, Germany P. Scharrer Mainz University, Mainz, Germany
	The GSI UNILAC will serve as part of an injector system for the future FAIR facility, currently under construction in Darmstadt, Germany. For this, it has to deliver short-pulsed, high-current, heavy-ion beams with highest beam quality. An upgrade for the 1.4 MeV/u gas stripper is ongoing to increase the yield of uranium ions in the desired charge state. The new setup features a pulsed gas injection synchronized with the beam pulse transit to increase the effective density of the stripper target while keeping the gas load for the differential pumping system low. Systematic measurements of charge state distributions and energy-loss were conducted with 238U-ion beams and different stripper gases, including H2 and He. By using H2 as a stripper gas, the yield into the most populated charge state was increased by over 50%, compared to the current stripper. Furthermore, the high gas density, enabled by the pulsed injection, results in increased mean charge states.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR058
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TUPMW006	Power Deposition in LHC Magnets Due to Bound-Free Pair Production in the Experimental Insertions	ion, dipole, luminosity, simulation	1418
	C. Bahamonde Castro, B. Auchmann, M.I. Besana, K. Brodzinski, R. Bruce, F. Cerutti, J.M. Jowett, A. Lechner, T. Mertens, V. Parma, S. Redaelli, M. Schaumann, N.V. Shetty, E. Skordis, G.E. Steele, R. van Weelderen CERN, Geneva, Switzerland
	The peak luminosity achieved during Pb-Pb collisions in the LHC in 2015 (3x1027cm^-2s⁻¹) well exceeded the design luminosity and is anticipated to increase by another factor 2 after the next Long Shutdown (2019- 2020). A significant fraction of the power dissipated in ultra-peripheral Pb-Pb collisions is carried by ions from bound-free pair production, which are lost in the dispersion suppressors adjacent to the experimental insertions. At higher luminosities, these ions risk to quench superconducting magnets and might limit their operation due to the dynamic heat load that needs to be evacuated by the cryogenic system. In this paper, we estimate the power deposition in superconducting coils and the magnet cold mass and we quantify the achievable reduction by deviating losses to less sensitive locations or by installing collimators at strategic positions. The second option is considered for the dispersion suppressor next to the ALICE insertion, where a selective displacement of losses to a magnet-free region is not possible.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMW006
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TUPMW015	Symplectic Tracking of Multi-Isotopic Heavy-Ion Beams in SixTrack	ion, dipole, simulation, quadrupole	1450
	P.D. Hermes, R. Bruce, R. De Maria CERN, Geneva, Switzerland
	Funding: Work suppported by the Wolfgang Gentner Programme of the German BMBF The software SixTrack provides symplectic proton tracking over a large number of turns. The code is used for the tracking of beam halo particles and the simulation of their interaction with the collimators to study the efficiency of the LHC collimation system. Tracking simulations for heavy-ion beams require taking into account the mass to charge ratio of each particle because heavy ions can be subject to fragmentation at their passage through the collimators. In this paper we present the derivation of a Hamiltonian for multi-isotopic heavy-ion beams and symplectic tracking maps derived from it. The resulting tracking maps were implemented in the tracking software SixTrack. With this modification, SixTrack can be used to natively track heavy-ion beams of multiple isotopes through a magnetic accelerator lattice.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMW015
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TUPMW027	The 2015 Heavy-Ion Run of the LHC	luminosity, ion, experiment, operation	1493
	J.M. Jowett, R. Alemany-Fernandez, R. Bruce, M. Giovannozzi, P.D. Hermes, W. Höfle, M. Lamont, T. Mertens, S. Redaelli, M. Schaumann, J.A. Uythoven, J. Wenninger CERN, Geneva, Switzerland
	In late 2015 the LHC collided lead nuclei at a beam energy of 6.37 Z TeV, chosen to match the 5.02 TeV per colliding nucleon pair of the p-Pb collision run in 2013. In so doing, it surpassed its design luminosity by a factor of 2. Besides the higher energy, the operational configuration had a number of new features with respect to the previous Pb-Pb run at 3.5 Z TeV in 2011; unusual bunch patterns providing collisions in the LHCb experiment for the first time, luminosity levelling and sharing requirements, a vertical displacement of the interaction point in the ALICE experiment, and operation closer to magnet quench limits with mitigation measures. We present a summary of the commissioning and operation and what has been learned in view of future heavy-ion operation at higher luminosity.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMW027
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TUPMW039	Measurement of the Total Cross Section of Gold-Gold Collisions at sqrt {s_NN}=200 GeV	luminosity, ion, collider, emittance	1530
	W. Fischer, A.J. Baltz, M. Blaskiewicz, K.A. Drees, D.M. Gassner, Y. Luo, M.G. Minty, P. Thieberger BNL, Upton, Long Island, New York, USA I.A. Pshenichnov RAS/INR, Moscow, Russia
	Funding: Work supported by U.S. DOE under contract No DE-AC02-98CH10886 with the U.S. Department of Energy. Heavy ion collision cross sections totaling several hundred barns have been calculated previously for the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). These total cross sections are more than one order of magnitude larger than the geometric ion-ion cross sections, primarily due to Bound-Free Pair Production (BFPP) and Electro-Magnetic Dissociation (EMD). Apart from a general interest in verifying the calculations experimentally, an accurate prediction of the losses created in the heavy ion collisions is of practical interest for RHIC and the LHC, where some collision products are lost in cryogenically cooled magnets. These losses have the potential to affect power and signal electronic devices and quench superconducing magnets. We have previously reported the total cross section measurement of U+U collisions at a center-of-mass energy of 192.8 GeV per nucleon-pair. Here we present the equivalent analysis for Au+Au collisions with the data available from a low-intensity store of RHIC Run in 2014.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMW039
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TUPOY006	Improvement of Scanning Irradiation in Gunma University Heavy Ion Medical Center	extraction, ion, acceleration, experiment	1914
	H. Souda, T. Kanai, K. Kikuchi, Y. Kubota, A. Matsumura, H. Shimada, M. Tashiro, K. Torikai, M. Torikoshi, S. Yamada, K. Yusa Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan T. Fujimoto AEC, Chiba, Japan E. Takeshita Kanagawa Cancer Center, Ion-beam Radiation Oncology Center in Kanagawa, Kanagawa, Japan
	Funding: Work collaborated with Mitsubishi Electric Corporation Ltd. Work supported by JSPS Kakenhi 26860395, Program for Cultivating Global Leaders in Heavy Ion Therapeutics and Engineering by MEXT of Japan. Gunma University Heavy Ion Medical Center (GHMC) is a compact heavy ion treatment facility* and have experienced 5 years of successful treatment operation. GHMC has 3 treatment room using broad beam (wobbling) irradiation system and 1 experimental irradiation room for the research and development of a spot-scanning irradiation. During the study toward the treatment, several improvements were done in both accelerator and irradiation system. For accelerators, slow extraction from a synchrotron using a transverse rf field is tested*. Compared with conventional extraction system of rf acceleration, ripples of the beam spill (peak to bottom ratio) is reduced from almost 100% to 60%; the deviation of the beam center position and the deviation of the beam size (1σ) are reduced to the order of 0.1 mm. For irradiation system, regularly operation for biological experiments has started form June 2014. In order to shorten the experiment time, 2-dimensional optimization of the irradiation planning was carried out. After the optimization, the irradiation time was reduced by 30% with keeping the dose uniformity within ±2.5%. T. Ohno et al., Cancers, 3, 4046 (2011) ** K. Noda et al., Nucl. Instrum. Meth. A492, 253 (2002)
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY006
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WEZA02	The NICA Project at JINR	ion, collider, detector, booster	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 WEZA02 [17.880 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEZA02
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WEPMB044	Development of RF Conditioning System for RISP RF Power Couplers	controls, cavity, vacuum, ion	2211
	C.K. Sung, E.-S. Kim Korea University Sejong Campus, Sejong, Republic of Korea S. Lee, I. Shin IBS, Daejeon, Republic of Korea
	RF power coupler prototypes have been conditioned for a heavy ion accelerator of the Rare Isotope Science Project (RISP) in Korea. The RF couplers operate for 162.5 MHz half-wave resonators at 6 kW RF power. The RF couplers are a 50-Ohm coaxial structure with a disk type ceramic window at room temperature. The control system using Labview software supported automatic process for RF conditioning, data acquisition and interlock system. The conditioning system and the result of conditioning of RF coupler are presented in this paper.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMB044
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WEPMW029	Simulation of Heavy-Ion Beam Losses with the SixTrack-FLUKA Active Coupling	ion, simulation, coupling, collimation	2490
	P.D. Hermes, R. Bruce, F. Cerutti, A. Ferrari, J.M. Jowett, A. Lechner, A. Mereghetti, D. Mirarchi, P.G. Ortega, S. Redaelli, B. Salvachua, E. Skordis, G. Valentino, V. Vlachoudis CERN, Geneva, Switzerland
	Funding: Work suppported by the Wolfgang Gentner Programme of the German BMBF The LHC heavy-ion program aims to further increase the stored ion beam energy, putting high demands on the LHC collimation system. Accurate simulations of the ion collimation efficiency are crucial to validate the feasibility of new proposed configurations and beam parameters. In this paper we present a generalized framework of the SixTrack-FLUKA coupling to simulate the fragmentation of heavy-ions in the collimators and their motion in the LHC lattice. We compare heavy-ion loss maps simulated on the basis of this framework with the loss distributions measured during heavy-ion operation in 2011 and 2015.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW029
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WEPMW032	Radiation-induced Effects on LHC Collimator Materials under Extreme Beam Conditions	radiation, ion, proton, neutron	2502
	E. Quaranta, A. Bertarelli, F. Carra, P.D. Hermes, S. Redaelli, A. Rossi CERN, Geneva, Switzerland K. Bunk Goethe Universität Frankfurt, Frankfurt am Main, Germany F. Carra Politecnico di Torino, Torino, Italy J. Guardia Valenzuela Universidad de Zaragoza, Zaragoza, Spain P.D. Hermes Westfaelische Wilhelms-Universität Muenster, Muenster, Germany C.L. Hubert, M. Tomut GSI, Darmstadt, Germany P. Nocera Università di Roma I La Sapienza, Roma, Italy C. Porth TU Darmstadt, Darmstadt, Germany N. Simos BNL, Upton, Long Island, New York, USA
	Over the last years, several samples of present and novel LHC collimator materials were irradiated under various beam conditions (using protons, fast neutrons, light and heavy ions at different energies and fluences) in different facilities around the world. This was achieved through an international collaboration including many companies and laboratories over the world. The main goal of the beam tests and the post-irradiation campaign is the definition of a threshold for radiation damage above which LHC collimators need to be replaced. In this paper, highlights of the measurements performed will be presented. First conclusions from the available data are also discussed.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW032
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THPMW009	Data Mining Applied in Management of Heavy Ion Accelerator Power Supplies	power-supply, ion, database, network	3552
	H. Zhang, D.Q. Gao, Q.S. Qian, P. Sun IMP/CAS, Lanzhou, People's Republic of China
	Scientific and effective management of power supplies could reduce the failure rate and improve the efficiency of the heavy ion accelerator. This paper shows how to introduce data mining into the intelligent management of heavy ion accelerator power supplies. A web site platform was developed to collect raw data. The raw data includes many kinds of information about one power supply's life cycle form its development to operation. Among which the failure records are particularly important. According to the attribute that the records are mostly nominal data, R software and SQL Server 2008 Business Intelligence Development Studio were chose as mining tools. R soft-ware was used to carry on the statistical characteristic analysis and SQL Server 2008 Business Intelligence Development Studio was used to find out association rules. Useful conclusions have been drawn. This work has laid a solid foundation to further establish the intelligent management system of heavy ion accelerator power supplies.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW009
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THPMW023	Simulation of an Accelerator Pulse Power Supply with an Active Rectifier Using SIMPLORER	simulation, power-supply, controls, ion	3594
	F.J. Wu, D.Q. Gao, M. Li IMP/CAS, Lanzhou, People's Republic of China
	In this paper, a simulation model of an accelerator pulse power supply with an active rectifier (voltage-type SVPWM rectifier) was set up based on the C-Model function in SIMPLORER 8.1, which is a simulation software belonging to the ANSOFT corporation. We introduce a SVPWM rectifier into an accelerator pulse power supply to solve its problems such as low input power factor, a large number of AC current harmonics and instable DC bus voltage due to the diode or thyristor rectifier used in it now. Components of control strategies developed in C language were built up and inserted into the simulation project. The simulation results indicate that an accelerator pulse power supply with a SVPWM rectifier can solve the problems above well. For all the control strategies were developed in C language, they can be transplanted into the digital signal processor (DSP) nearly without change for the prototype controlling. So it provides a basis for development of the experimental prototype.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW023
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THPOY013	Signal Archiving System for RISP Heavy-ion Accelerator Control System	controls, EPICS, ion, framework	4113
	S.H. Nam Korea University, Seoul, Republic of Korea H. Jang, S. Lee, M.J. Park, C.W. Son, H.J. Son IBS, Daejeon, Republic of Korea E.-S. Kim Korea University Sejong Campus, Sejong, Republic of Korea
	RISP control system uses the EPICS real time distributed control system, which is software framework for stable operation of the accelerator. The output signal from all machines and devices must be archived by EPICS framework, and optimized signal archiver system is needed for each accelerator facility. Signal archiver method using the EPICS framework has three significant ways. First is the classic channel archiver using the file base method and the second is the RDB archiver using the relational database. But classic channel archiver has a problem that the index file containing information of data block corresponding PV data mismatch with real data. Also, there is a problem in the performance of file I/O in RDB archiver. SLAC has developed archiver appliance utility to resolve these problems, and the usage of archiver appliance in EPICS community has gradually increased. RISP choose the archiver appliance to also signal archiver solution. However, archiver appliance is not optimized for our RISP heavy-ion accelerator control system. Thus, we will develop the customized signal archiver system for RISP heavy-ion accelerator control system.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY013
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FRYAA01	Progress of the RAON Heavy Ion Accelerator Project in Korea	ion, ISOL, target, rfq	4261
	S.C. Jeong IBS, Daejeon, Republic of Korea
	The RAON heavy ion accelerator facility is under construction in Korea. With a 400-kW superconducting linac as the workhorse, the facility is to establish the In-flight Fragment (IF) and Isotope Separation On-Line (ISOL) facilities to support advanced science researches. Beam dynamics studies have progressed to cover start-to-end simulations including machine errors. There has been significant progress in sub-system prototype studies including 28-GHz ECR ion source, superconducting cavities and magnets, and IF target. This talk presents recent progress and status of the project.
	Slides FRYAA01 [14.434 MB]
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MOPMR010

The Development of Scintillating Screen Detector for Beam Monitoring at the KHIMA Project

proton, ion, experiment, cyclotron

244

S.Y. Noh, S.D. Chang, J.G. Hwang
KIRAMS/KHIMA, Seoul, Republic of Korea
G. Hahn, T.K. Yang
KIRAMS, Seoul, Republic of Korea

Funding: NRF-2014M2C3A1029534
It is important to measure the beam propeties such as position, size and intensity, when we control the medical beam qualities, So we developed the scintillation screen monitor used for beam profile monitoring and it will be installed at High Energy Beam Transport(HEBT) section to measure the beam parameters. This system consists of a terbium-doped gadolinium oxysulfide(Gd2O2S:Tb) phosphor screen and high speed charge coupled device camera. The CCD camera has the maximum 90 frame rate and 659 X 494 pixel resolution. This Camera is mounted at distance of 260mm from the center of the scintillation screen and with the angle of 45 degree to the scintillation screen which is mounted at the angle of 45 degree to the beam axis. The image analysis program was written in National Instruments LabVIEW using IMAQ driver. To reduce the image processing time, we optimized the prcessing flow and used LabVIEW built-in function. To evaluate this system, we measured the beam size and center position of the beam at KIRAMS on 50MeV cyclotron. In this paper, we present the manufacture of beam profile system based on a scintillating screen monitor and the in-beam test results of it.

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MOPOY022

Further Upgrade Measures at New GSI cw-Linac Demonstrator Setup

solenoid, cavity, linac, ion

892

M. Heilmann, W.A. Barth, S. Mickat, S. Yaramyshev
GSI, Darmstadt, Germany
M. Amberg, M. Basten, F.D. Dziuba, H. Podlech, U. Ratzinger, M. Schwarz
IAP, Frankfurt am Main, Germany
K. Aulenbacher
IKP, Mainz, Germany
K. Aulenbacher, W.A. Barth, V. Gettmann, S. Mickat, M. Miski-Oglu
HIM, Mainz, Germany

A new continuous wave (cw) linac is required to deliver high intensity heavy ion beams for Super Heavy Element (SHE) future experiments at GSI Darmstadt, Germany. The presented upgrade measures are dedicated to improve the performance of the cw demonstrator setup. The key component is a cryomodule comprising a superconducting (sc) 217 MHz Crossbar-H-mode (CH) cavity surrounded by two sc 9.3T solenoids with compensation coils. The solenoid coil is made of a Nb3Sn wire; and the compensation coils at both ends of the solenoid comprises NbTi wires. The distance between solenoid lense and CH cavity has to be optimized for ideal beam matching as well as for a minimum rest field inside the cavity below the critical magnetic field. The GSI High Charge State (HLI) injector has to deliver a heavy ion beam with an energy of 1.4 MeV/u. Longitudinal matching to the demonstrator is provided by two 10⁸.4 MHz cw room temperature λ/4 re-buncher cavity installed behind the HLI. In this paper electromagnetic simulations of the field optimization for the solenoids and the re-buncher cavities will be presented as well as first beam experiments at the beam transport line to the demonstrator cavity.

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MOPOY023

Further Steps Towards the Superconducting CW-LINAC for Heavy Ions at GSI

linac, cavity, ion, target

896

M. Schwarz, M. Basten, M. Busch, F.D. Dziuba, H. Podlech, U. Ratzinger, R. Tiede
IAP, Frankfurt am Main, Germany
W.A. Barth, V. Gettmann, M. Heilmann, S. Mickat, M. Miski-Oglu, S. Yaramyshev
GSI, Darmstadt, Germany
W.A. Barth, V. Gettmann, S. Mickat, M. Miski-Oglu
HIM, Mainz, Germany

Funding: Work supported by BMBF contr. No. 05P15RFRBA
For future experiments with heavy ions near the coulomb barrier within the super-heavy element (SHE) research project a multi-stage R&D program of GSI, HIM and IAP is currently in progress. It aims at developing a superconducting (sc) continuous wave (cw) LINAC with multiple CH cavities as key components downstream the upgraded High Charge Injector (HLI) at GSI. The LINAC design is challenging, due to the requirement of intense beams in cw-mode up to a mass-to-charge-ratio of 6 while covering a broad output energy range from 3.5 to 7.3 MeV/u with minimum energy spread. The next milestone will be a full performance beam test of the first expansion stage at GSI, the Demonstrator, comprising two solenoids and a 15-gap CH cavity inside a cryostat.

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MOPOY033

Design Study on an Injector RFQ for Heavy Ion Accelerator Facility

rfq, simulation, cavity, ion

928

W. Ma, Y. He, L. Lu, X.B. Xu, Z.L. Zhang, H.W. Zhao
IMP/CAS, Lanzhou, People's Republic of China

A Low Energy Accelerator Facility (LEAF) was launched as a pre-research facility for High Intensity heavy ion Accelerator Facility (HIAF). The LEAF consists of a 2-mA U³⁴⁺ electron cyclotron resonance (ECR) type ion source with 300-kV extraction voltage, a low energy beam transport (LEBT) line with a multi-harmonic buncher (MHB), a CW 81.25MHz radio frequency quad-rupole (RFQ) accelerator which could accelerate heavy ions from 14 keV/u up to 500 keV/u, a triplet magnet for medium energy beam transport and an experimental platform for nuclear physics. After describing the selected structure, an octagonal cavity with π-mode stabilizing loop (PISL) type structure was adopted and simulated. In this paper, the detailed electromagnetic design and ther-mal simulation of the LEAF-RFQ will be reported.

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MOPOY055

Technologies for Stabilizing the Dynamic Vacuum and Charge Related Beam Loss in Heavy Ion Synchrotrons

ion, vacuum, synchrotron, cryogenics

977

P.J. Spiller, L.H.J. Bozyk, C. Omet, I. Pongrac, St. Wilfert
GSI, Darmstadt, Germany

With increasing the intensities of heavy ion beams in synchrotrons, charge related beam loss become more and more significant. In order to reduce space charge forces and to minimize the incoherent tune spread, the charge state of heavy Ions shall be lowered. Thus the cross section for charge related beam loss is further enhanced. For the FAIR project, GSI has developed a number of different technologies to stabilize the dynamic residual gas pressure and thereby to minimize charge related beam loss at high intensity heavy ion operation. Technologies suitable for such issues are, dedicated lattice structures, cold and warm ion catchers, NEG coated and cryogenic magnet chambers and cryo-adsorption pumps.

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TUPMR022

Present Status and Future Plan of RIKEN RI Beam Factory

ion, cyclotron, acceleration, ion-source

1281

O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, S. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa
RIKEN Nishina Center, Wako, Japan

Recent efforts concerning the accelerators of the RIKEN RI Beam Factory (RIBF) have been directed towards achieving higher heavy-ion beam intensities. As shown at the IPAC2014 conference, the intensities of these ion beams have improved significantly following the construction of the new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, development of the helium gas stripper, and upgrading of the bending power of the fRC. In this respect, this paper presents the subsequent upgrade programs conducted in the past two years, such as the development of a new charge stripper for uranium beam and a new acceleration scheme of krypton beam. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.

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TUPMR056

Development and Investigation of Pulsed Pinch Plasmas for the Application as FAIR Plasma Stripper

plasma, ion, electron, cathode

1387

M. Iberler, T. Ackermann, B. Bohlender, C. Hock, J. Jacoby, D. Mann, A. Puth, J. Wiechula
IAP, Frankfurt am Main, Germany
G. Ge
GSI, Darmstadt, Germany

Funding: This work is supported by BMBF
The planed Facility for Ion Research (FAIR) is a new international accelerator laboratory at the GSI in Darm-stadt, Germany. The main topic at this facility is aimed to heavy ion research. The FAIR project in comparison to the existing facility GSI extends the research area by raising the energy of ion beams. After creation of the ion beam at the ion source the state charge is low. Therefor the demand for acceleration of the beam to the highest possible energy is a highly ionized charge state of the beam. For beam stripping to get higher charge state, the traditional tools are gas stripper and foil stripper [1, 2]. Hence Plasma is suggested to be a stripper medium. In Frankfurt are different kinds of Pinch Plasmas under investigation for Stripper. The constricting effect on the plasma or conductor is produced by the magnetic field pressure resulting from the current or by the Lorentz force produced by the current flowing in its own magnetic field. In addition to separate the high pressure discharge cham-ber of the accelerator a plasma window will be used [3]. This contribution gives an overview of the plasma proper-ties and shows first results of different beam times at the GSI.

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TUPMR058

An Upgrade for the 1.4 MeV/u Gas Stripper at the GSI UNILAC

target, ion, injection, dipole

1394

P. Scharrer, W.A. Barth, Ch.E. Düllmann, J. Khuyagbaatar, A. Yakushev
HIM, Mainz, Germany
W.A. Barth, M. Bevcic, Ch.E. Düllmann, L. Groening, K.P. Horn, E. Jäger, J. Khuyagbaatar, J. Krier, P. Scharrer, A. Yakushev
GSI, Darmstadt, Germany
Ch.E. Düllmann
Johannes Gutenberg University Mainz, Institut of Nuclear Chemistry, Mainz, Germany
P. Scharrer
Mainz University, Mainz, Germany

The GSI UNILAC will serve as part of an injector system for the future FAIR facility, currently under construction in Darmstadt, Germany. For this, it has to deliver short-pulsed, high-current, heavy-ion beams with highest beam quality. An upgrade for the 1.4 MeV/u gas stripper is ongoing to increase the yield of uranium ions in the desired charge state. The new setup features a pulsed gas injection synchronized with the beam pulse transit to increase the effective density of the stripper target while keeping the gas load for the differential pumping system low. Systematic measurements of charge state distributions and energy-loss were conducted with 238U-ion beams and different stripper gases, including H2 and He. By using H2 as a stripper gas, the yield into the most populated charge state was increased by over 50%, compared to the current stripper. Furthermore, the high gas density, enabled by the pulsed injection, results in increased mean charge states.

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TUPMW006

Power Deposition in LHC Magnets Due to Bound-Free Pair Production in the Experimental Insertions

ion, dipole, luminosity, simulation

1418

C. Bahamonde Castro, B. Auchmann, M.I. Besana, K. Brodzinski, R. Bruce, F. Cerutti, J.M. Jowett, A. Lechner, T. Mertens, V. Parma, S. Redaelli, M. Schaumann, N.V. Shetty, E. Skordis, G.E. Steele, R. van Weelderen
CERN, Geneva, Switzerland

The peak luminosity achieved during Pb-Pb collisions in the LHC in 2015 (3x1027cm^-2s⁻¹) well exceeded the design luminosity and is anticipated to increase by another factor 2 after the next Long Shutdown (2019- 2020). A significant fraction of the power dissipated in ultra-peripheral Pb-Pb collisions is carried by ions from bound-free pair production, which are lost in the dispersion suppressors adjacent to the experimental insertions. At higher luminosities, these ions risk to quench superconducting magnets and might limit their operation due to the dynamic heat load that needs to be evacuated by the cryogenic system. In this paper, we estimate the power deposition in superconducting coils and the magnet cold mass and we quantify the achievable reduction by deviating losses to less sensitive locations or by installing collimators at strategic positions. The second option is considered for the dispersion suppressor next to the ALICE insertion, where a selective displacement of losses to a magnet-free region is not possible.

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TUPMW015

Symplectic Tracking of Multi-Isotopic Heavy-Ion Beams in SixTrack

ion, dipole, simulation, quadrupole

1450

P.D. Hermes, R. Bruce, R. De Maria
CERN, Geneva, Switzerland

Funding: Work suppported by the Wolfgang Gentner Programme of the German BMBF
The software SixTrack provides symplectic proton tracking over a large number of turns. The code is used for the tracking of beam halo particles and the simulation of their interaction with the collimators to study the efficiency of the LHC collimation system. Tracking simulations for heavy-ion beams require taking into account the mass to charge ratio of each particle because heavy ions can be subject to fragmentation at their passage through the collimators. In this paper we present the derivation of a Hamiltonian for multi-isotopic heavy-ion beams and symplectic tracking maps derived from it. The resulting tracking maps were implemented in the tracking software SixTrack. With this modification, SixTrack can be used to natively track heavy-ion beams of multiple isotopes through a magnetic accelerator lattice.

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TUPMW027

The 2015 Heavy-Ion Run of the LHC

luminosity, ion, experiment, operation

1493

J.M. Jowett, R. Alemany-Fernandez, R. Bruce, M. Giovannozzi, P.D. Hermes, W. Höfle, M. Lamont, T. Mertens, S. Redaelli, M. Schaumann, J.A. Uythoven, J. Wenninger
CERN, Geneva, Switzerland

In late 2015 the LHC collided lead nuclei at a beam energy of 6.37 Z TeV, chosen to match the 5.02 TeV per colliding nucleon pair of the p-Pb collision run in 2013. In so doing, it surpassed its design luminosity by a factor of 2. Besides the higher energy, the operational configuration had a number of new features with respect to the previous Pb-Pb run at 3.5 Z TeV in 2011; unusual bunch patterns providing collisions in the LHCb experiment for the first time, luminosity levelling and sharing requirements, a vertical displacement of the interaction point in the ALICE experiment, and operation closer to magnet quench limits with mitigation measures. We present a summary of the commissioning and operation and what has been learned in view of future heavy-ion operation at higher luminosity.

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TUPMW039

Measurement of the Total Cross Section of Gold-Gold Collisions at sqrt {s_NN}=200 GeV

luminosity, ion, collider, emittance

1530

W. Fischer, A.J. Baltz, M. Blaskiewicz, K.A. Drees, D.M. Gassner, Y. Luo, M.G. Minty, P. Thieberger
BNL, Upton, Long Island, New York, USA
I.A. Pshenichnov
RAS/INR, Moscow, Russia

Funding: Work supported by U.S. DOE under contract No DE-AC02-98CH10886 with the U.S. Department of Energy.
Heavy ion collision cross sections totaling several hundred barns have been calculated previously for the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). These total cross sections are more than one order of magnitude larger than the geometric ion-ion cross sections, primarily due to Bound-Free Pair Production (BFPP) and Electro-Magnetic Dissociation (EMD). Apart from a general interest in verifying the calculations experimentally, an accurate prediction of the losses created in the heavy ion collisions is of practical interest for RHIC and the LHC, where some collision products are lost in cryogenically cooled magnets. These losses have the potential to affect power and signal electronic devices and quench superconducing magnets. We have previously reported the total cross section measurement of U+U collisions at a center-of-mass energy of 192.8 GeV per nucleon-pair. Here we present the equivalent analysis for Au+Au collisions with the data available from a low-intensity store of RHIC Run in 2014.

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TUPOY006

Improvement of Scanning Irradiation in Gunma University Heavy Ion Medical Center

extraction, ion, acceleration, experiment

1914

H. Souda, T. Kanai, K. Kikuchi, Y. Kubota, A. Matsumura, H. Shimada, M. Tashiro, K. Torikai, M. Torikoshi, S. Yamada, K. Yusa
Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan
T. Fujimoto
AEC, Chiba, Japan
E. Takeshita
Kanagawa Cancer Center, Ion-beam Radiation Oncology Center in Kanagawa, Kanagawa, Japan

Funding: Work collaborated with Mitsubishi Electric Corporation Ltd. Work supported by JSPS Kakenhi 26860395, Program for Cultivating Global Leaders in Heavy Ion Therapeutics and Engineering by MEXT of Japan.
Gunma University Heavy Ion Medical Center (GHMC) is a compact heavy ion treatment facility* and have experienced 5 years of successful treatment operation. GHMC has 3 treatment room using broad beam (wobbling) irradiation system and 1 experimental irradiation room for the research and development of a spot-scanning irradiation. During the study toward the treatment, several improvements were done in both accelerator and irradiation system. For accelerators, slow extraction from a synchrotron using a transverse rf field is tested**. Compared with conventional extraction system of rf acceleration, ripples of the beam spill (peak to bottom ratio) is reduced from almost 100% to 60%; the deviation of the beam center position and the deviation of the beam size (1σ) are reduced to the order of 0.1 mm. For irradiation system, regularly operation for biological experiments has started form June 2014. In order to shorten the experiment time, 2-dimensional optimization of the irradiation planning was carried out. After the optimization, the irradiation time was reduced by 30% with keeping the dose uniformity within ±2.5%.
* T. Ohno et al., Cancers, 3, 4046 (2011)
** K. Noda et al., Nucl. Instrum. Meth. A492, 253 (2002)

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WEZA02

The NICA Project at JINR

ion, collider, detector, booster

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 WEZA02 [17.880 MB]

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WEPMB044

Development of RF Conditioning System for RISP RF Power Couplers

controls, cavity, vacuum, ion

2211

C.K. Sung, E.-S. Kim
Korea University Sejong Campus, Sejong, Republic of Korea
S. Lee, I. Shin
IBS, Daejeon, Republic of Korea

RF power coupler prototypes have been conditioned for a heavy ion accelerator of the Rare Isotope Science Project (RISP) in Korea. The RF couplers operate for 162.5 MHz half-wave resonators at 6 kW RF power. The RF couplers are a 50-Ohm coaxial structure with a disk type ceramic window at room temperature. The control system using Labview software supported automatic process for RF conditioning, data acquisition and interlock system. The conditioning system and the result of conditioning of RF coupler are presented in this paper.

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WEPMW029

Simulation of Heavy-Ion Beam Losses with the SixTrack-FLUKA Active Coupling

ion, simulation, coupling, collimation

2490

P.D. Hermes, R. Bruce, F. Cerutti, A. Ferrari, J.M. Jowett, A. Lechner, A. Mereghetti, D. Mirarchi, P.G. Ortega, S. Redaelli, B. Salvachua, E. Skordis, G. Valentino, V. Vlachoudis
CERN, Geneva, Switzerland

Funding: Work suppported by the Wolfgang Gentner Programme of the German BMBF
The LHC heavy-ion program aims to further increase the stored ion beam energy, putting high demands on the LHC collimation system. Accurate simulations of the ion collimation efficiency are crucial to validate the feasibility of new proposed configurations and beam parameters. In this paper we present a generalized framework of the SixTrack-FLUKA coupling to simulate the fragmentation of heavy-ions in the collimators and their motion in the LHC lattice. We compare heavy-ion loss maps simulated on the basis of this framework with the loss distributions measured during heavy-ion operation in 2011 and 2015.

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WEPMW032

Radiation-induced Effects on LHC Collimator Materials under Extreme Beam Conditions

radiation, ion, proton, neutron

2502

E. Quaranta, A. Bertarelli, F. Carra, P.D. Hermes, S. Redaelli, A. Rossi
CERN, Geneva, Switzerland
K. Bunk
Goethe Universität Frankfurt, Frankfurt am Main, Germany
F. Carra
Politecnico di Torino, Torino, Italy
J. Guardia Valenzuela
Universidad de Zaragoza, Zaragoza, Spain
P.D. Hermes
Westfaelische Wilhelms-Universität Muenster, Muenster, Germany
C.L. Hubert, M. Tomut
GSI, Darmstadt, Germany
P. Nocera
Università di Roma I La Sapienza, Roma, Italy
C. Porth
TU Darmstadt, Darmstadt, Germany
N. Simos
BNL, Upton, Long Island, New York, USA

Over the last years, several samples of present and novel LHC collimator materials were irradiated under various beam conditions (using protons, fast neutrons, light and heavy ions at different energies and fluences) in different facilities around the world. This was achieved through an international collaboration including many companies and laboratories over the world. The main goal of the beam tests and the post-irradiation campaign is the definition of a threshold for radiation damage above which LHC collimators need to be replaced. In this paper, highlights of the measurements performed will be presented. First conclusions from the available data are also discussed.

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THPMW009

Data Mining Applied in Management of Heavy Ion Accelerator Power Supplies

power-supply, ion, database, network

3552

H. Zhang, D.Q. Gao, Q.S. Qian, P. Sun
IMP/CAS, Lanzhou, People's Republic of China

Scientific and effective management of power supplies could reduce the failure rate and improve the efficiency of the heavy ion accelerator. This paper shows how to introduce data mining into the intelligent management of heavy ion accelerator power supplies. A web site platform was developed to collect raw data. The raw data includes many kinds of information about one power supply's life cycle form its development to operation. Among which the failure records are particularly important. According to the attribute that the records are mostly nominal data, R software and SQL Server 2008 Business Intelligence Development Studio were chose as mining tools. R soft-ware was used to carry on the statistical characteristic analysis and SQL Server 2008 Business Intelligence Development Studio was used to find out association rules. Useful conclusions have been drawn. This work has laid a solid foundation to further establish the intelligent management system of heavy ion accelerator power supplies.

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THPMW023

Simulation of an Accelerator Pulse Power Supply with an Active Rectifier Using SIMPLORER

simulation, power-supply, controls, ion

3594

F.J. Wu, D.Q. Gao, M. Li
IMP/CAS, Lanzhou, People's Republic of China

In this paper, a simulation model of an accelerator pulse power supply with an active rectifier (voltage-type SVPWM rectifier) was set up based on the C-Model function in SIMPLORER 8.1, which is a simulation software belonging to the ANSOFT corporation. We introduce a SVPWM rectifier into an accelerator pulse power supply to solve its problems such as low input power factor, a large number of AC current harmonics and instable DC bus voltage due to the diode or thyristor rectifier used in it now. Components of control strategies developed in C language were built up and inserted into the simulation project. The simulation results indicate that an accelerator pulse power supply with a SVPWM rectifier can solve the problems above well. For all the control strategies were developed in C language, they can be transplanted into the digital signal processor (DSP) nearly without change for the prototype controlling. So it provides a basis for development of the experimental prototype.

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THPOY013

Signal Archiving System for RISP Heavy-ion Accelerator Control System

controls, EPICS, ion, framework

4113

S.H. Nam
Korea University, Seoul, Republic of Korea
H. Jang, S. Lee, M.J. Park, C.W. Son, H.J. Son
IBS, Daejeon, Republic of Korea
E.-S. Kim
Korea University Sejong Campus, Sejong, Republic of Korea

RISP control system uses the EPICS real time distributed control system, which is software framework for stable operation of the accelerator. The output signal from all machines and devices must be archived by EPICS framework, and optimized signal archiver system is needed for each accelerator facility. Signal archiver method using the EPICS framework has three significant ways. First is the classic channel archiver using the file base method and the second is the RDB archiver using the relational database. But classic channel archiver has a problem that the index file containing information of data block corresponding PV data mismatch with real data. Also, there is a problem in the performance of file I/O in RDB archiver. SLAC has developed archiver appliance utility to resolve these problems, and the usage of archiver appliance in EPICS community has gradually increased. RISP choose the archiver appliance to also signal archiver solution. However, archiver appliance is not optimized for our RISP heavy-ion accelerator control system. Thus, we will develop the customized signal archiver system for RISP heavy-ion accelerator control system.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY013

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FRYAA01

Progress of the RAON Heavy Ion Accelerator Project in Korea

ion, ISOL, target, rfq

4261

S.C. Jeong
IBS, Daejeon, Republic of Korea

The RAON heavy ion accelerator facility is under construction in Korea. With a 400-kW superconducting linac as the workhorse, the facility is to establish the In-flight Fragment (IF) and Isotope Separation On-Line (ISOL) facilities to support advanced science researches. Beam dynamics studies have progressed to cover start-to-end simulations including machine errors. There has been significant progress in sub-system prototype studies including 28-GHz ECR ion source, superconducting cavities and magnets, and IF target. This talk presents recent progress and status of the project.

Slides FRYAA01 [14.434 MB]

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-FRYAA01

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