Keyword: heavy-ion
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MOZZPLM1 Beam Commissioning of the Demonstrator Setup for the Superconducting Continuous Wave HIM/GSI-Linac cavity, linac, cryomodule, solenoid 33
 
  • M. Miski-Oglu, K. Aulenbacher, V. Gettmann, T. Kürzeder
    HIM, Mainz, Germany
  • K. Aulenbacher, F.D. Dziuba
    IKP, Mainz, Germany
  • W.A. Barth, C. Burandt, V. Gettmann, M. Heilmann, T. Kürzeder, A. Rubin, A. Schnase, S. Yaramyshev
    GSI, Darmstadt, Germany
  • W.A. Barth, S. Yaramyshev
    MEPhI, Moscow, Russia
  • M. Basten, M. Busch, T. Conrad, H. Podlech, M. Schwarz
    IAP, Frankfurt am Main, Germany
 
  During successful beam commissioning of the superconducting 15-gap Crossbar H-mode cavity at GSI Helmholtzzentrum für Schwerionenforschung heavy ions up to the design beam energy have been accelerated. The design acceleration gain of 3.5 MeV inside a length of less than 70 cm has been reached with full transmission for heavy ion beams of up to 1.5 particle mueA. The measured beam parameters confirm sufficient beam quality. The machine beam commissioning is a major milestone of the R&D for the superconducting heavy ion continuous wave linear accelerator HELIAC of Helmholtz Institute Mainz (HIM) and GSI developed in collaboration with IAP Goethe-University Frankfurt. The next step is the procurement and commissioning of so called ’Advanced Demonstrator’ - the first of series cryo module for the entire accelerator HELIAC. Results of further Demonstrator beam tests, as well as the status of the Advanced demonstrator project will be reported.  
slides icon Slides MOZZPLM1 [3.088 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOZZPLM1  
About • paper received ※ 29 April 2019       paper accepted ※ 24 May 2019       issue date ※ 21 June 2019  
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MOPMP013 New Nuclotron Beam Lines and Stations for Applied Researches radiation, target, dipole, diagnostics 449
 
  • E. Syresin, A.A. Baldin, A.V. Butenko, G.A. Filatov, A.A. Slivin, G.N. Timoshenko, G.V. Trubnikov, A. Tuzikov
    JINR, Dubna, Moscow Region, Russia
  • D.V. Bobrovskiy, A.I. Chumakov
    MEPhI, Moscow, Russia
  • M.M. Kats, T. Kulevoy, D.A. Liakin, Y.E. Titarenko
    ITEP, Moscow, Russia
 
  New beamlines for applied researches on the Nuclotron are under development within the framework of implementation of the NICA accelerator facility. Ion beams with energies of 150-800 MeV/n extracted from the Nuclotron will be used for radiobiological researches and modeling of cosmic rays interactions with microchips. Equipment of two experimental stations is under development by the JINR-ITEP-MEPhi collaboration for these applied researches. Ion beams with the energy of 3.2 MeV/n extracted from the heavy ion linac HILAc will also be used for irradiation and testing of microchips. The specialized channel will be reconstructed for investigations in the field of relativistic nuclear power at light ion energies of 0.3-4.5 GeV/n. Three new experimental areas are organized for applied physics researches within the framework of implementation of the NICA accelerator facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPMP013  
About • paper received ※ 29 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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MOPRB050 Performance of the Collimation System During the 2018 Lead Ion Run at the Large Hadron Collider collimation, simulation, proton, hadron 677
 
  • N. Fuster-Martínez, R. Bruce, J.M. Jowett, A. Mereghetti, D. Mirarchi, S. Redaelli
    CERN, Meyrin, Switzerland
 
  As part of the Large Hadron Collider (LHC) heavy-ion research programme, the last month of the 2018 LHC run was dedicated to Pb ion physics. Several heavy-ion runs have been performed since the start-up of the LHC. These runs are challenging for collimation, despite lower intensities, because of the degraded cleaning observed compared to protons. This is due to the differences of the interaction mechanisms in the collimators. Ions experience fragmentation and electromagnetic dissociation that result in a substantial flux of off-rigidity particles that escape the collimation system. In this paper, the collimation system performance and the experience gained during the 2018 Pb ion run are presented. The measured performance is compared with the expectation from the Sixtrack-FLUKA coupling simulations and the agreement discussed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPRB050  
About • paper received ※ 07 May 2019       paper accepted ※ 19 May 2019       issue date ※ 21 June 2019  
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MOPRB072 eRHIC in Electron-Ion Operation operation, electron, collider, hadron 738
 
  • W. Fischer, E.C. Aschenauer, E.N. Beebe, M. Blaskiewicz, K.A. Brown, D. Bruno, K.A. Drees, C.J. Gardner, H. Huang, T. Kanesue, C. Liu, M. Mapes, G.T. McIntyre, M.G. Minty, C. Montag, S.K. Nayak, M. Okamura, V. Ptitsyn, D. Raparia, J. Sandberg, K.S. Smith, P. Thieberger, N. Tsoupas, J.E. Tuozzolo, F.J. Willeke, A. Zaltsman, A. Zelenski
    BNL, Upton, Long Island, New York, USA
 
  Funding: Work supported by U.S. DOE under contract No DE-AC02-98CH10886 with the U.S. Department of Energy.
The design effort for the electron-ion collider eRHIC has concentrated on electron-proton collisions at the highest luminosities over the widest possible energy range. The present design also provides for electron-nucleon peak luminosities of up to 4.7·1033 cm-2s−1 with strong hadron cooling, and up to 1.7·1033 cm-2s−1 with stochastic cooling. Here we discuss the performance limitations and design choices for electron-ion collisions that are different from the electron-proton collisions. These include the ion bunch preparation in the injector chain, acceleration and intrabeam scattering in the hadron ring, path length adjustment and synchronization with the electron ring, stochastic cooling upgrades, machine protection upgrades, and operation with polarized electron beams colliding with either unpolarized ion beams or polarized He-3.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPRB072  
About • paper received ※ 14 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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MOPTS024 Reconstruction of the Longitudinal Phase Portrait for the SC CW Heavy Ion HELIAC at GSI linac, cavity, proton, quadrupole 898
 
  • S. Lauber, K. Aulenbacher, W.A. Barth, C. Burandt, F.D. Dziuba, V. Gettmann, T. Kürzeder, J. List, M. Miski-Oglu
    HIM, Mainz, Germany
  • K. Aulenbacher, F.D. Dziuba
    IKP, Mainz, Germany
  • W.A. Barth, C. Burandt, F.D. Dziuba, P. Forck, V. Gettmann, M. Heilmann, T. Kürzeder, S. Lauber, J. List, M. Miski-Oglu, A. Rubin, T. Sieber, S. Yaramyshev
    GSI, Darmstadt, Germany
  • H. Podlech, M. Schwarz
    IAP, Frankfurt am Main, Germany
 
  At the GSI Helmholtzzentrum für Schwerionenforschung (GSI) in Darmstadt, Germany, the HElmholtz LInear ACcelerator (HELIAC) is currently under construction. The HELIAC comprises superconducting multigap Crossbar H-mode (SC CH) cavities. The input beam is delivered by an already existing High Charge Injector (HLI). For the further development of the accelerator a detailed knowledge of the input beam parameters to the SC section is necessary. A method for beam reconstruction is incorporated, which provides for longitudinal beam characteristics using measurements with a beam shape monitor and a particle simulation code. This finalizes the investigations on 6D beam parameters, following previous measurements in transversal phase space. The reconstruction of the longitudinal phase portrait is presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS024  
About • paper received ※ 24 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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MOPTS034 Advanced Beam Dynamics Design for the Superconducting Heavy Ion Accelerator HELIAC cavity, linac, SRF, acceleration 928
 
  • M. Schwarz, M. Basten, M. Busch, T. Conrad, H. Podlech
    IAP, Frankfurt am Main, Germany
  • K. Aulenbacher
    IKP, Mainz, Germany
  • K. Aulenbacher, W.A. Barth, C. Burandt, M. Heilmann, S. Lauber, J. List, A. Rubin, S. Yaramyshev
    GSI, Darmstadt, Germany
  • K. Aulenbacher, W.A. Barth, C. Burandt, F.D. Dziuba, V. Gettmann, T. Kürzeder, S. Lauber, J. List, M. Miski-Oglu
    HIM, Mainz, Germany
  • S. Lauber, J. List
    KPH, Mainz, Germany
 
  Funding: Work supported by BMBF contr. No. 05P18RFRB1, EU Framework Programme H2020 662186 (MYRTE) and HIC for FAIR
The standalone superconducting (SC) continuous wave (CW) heavy ion linac HELIAC (HElmholtz LInear ACcelerator) is a common project of GSI and HIM under key support of IAP Frankfurt and in collaboration with Moscow Engineering Physics Institute (MEPhI) and Moscow Institute for Theoretical and Experimental Physics (KI-ITEP). It is intended for future experiments with heavy ions near the Coulomb barrier within super-heavy element (SHE) research and aims at developing a linac with multiple CH cavities as key components downstream the High Charge State Injector (HLI) at GSI. The 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. In 2017 the first superconducting section of the linac has been successfully commissioned and extensively tested with beam at GSI. In the light of experience gained in this research so far, the beam dynamics layout for the entire linac has recently been updated and optimized with particular emphasis on realistic assumptions of cavity gap and drift lengths as well as gap voltage distributions for CH3’CH11.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS034  
About • paper received ※ 30 April 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019  
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MOPTS060 SESRI 300 MeV Proton and Heavy Ion Accelerator proton, ion-source, linac, synchrotron 998
 
  • H. P. Jiang, Q.M. Chen, W. Chen, Z.N. Han, H.F. Hao, J. Liu, J. Zhang, T. Zhang
    Harbin Institute of Technology(HIT), Harbin, People’s Republic of China
 
  The SESRI (Space Environment Simulation and Research Infrastructure) is the new national research infrastructure under construction at Harbin Institute of Technology (HIT) in China. This infrastructure is specifically built to simulate the space environment on the ground. The SESRI has kinds of accelerators, and the 300MeV proton and heavy ion accelerator is a major radiation source, which will supply 100-300MeV protons and 7-85MeV/u heavy ions for studying the interaction of high energy space particle radiation with material, device, module and life. To meet above requirements, the facility adopts the combination of room temperature ECR (Electron Cyclotron Resonance) ion source, linac injector and synchrotron. The ion source is required to provide all stable nuclide beams from H2+ to Bi. The linac injector supplies 1MeV/u heavy ion beams and 5MeV proton beam by using RFQ (Radio Frequency Quadrupole) and IH-DTL (Interdigital H-mode type Drift Tube Linac) linac structures. The synchrotron accelerates heavy ions up to 85MeV/u and proton beam 300MeV. And the 3rd integer resonance and RF-KO (RF-Knock-Out) method are adopted for slow extraction. The status of 300MeV proton and heavy ion accelerator design and construction works are briefly described below.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS060  
About • paper received ※ 22 April 2019       paper accepted ※ 21 May 2019       issue date ※ 21 June 2019  
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TUPMP054 Investigations on Cryopanels in the Room Temperature Heavy Ion Synchrotron SIS18 vacuum, cryogenics, synchrotron, operation 1372
 
  • L.H.J. Bozyk, S. Aumüller, P.J. Spiller
    GSI, Darmstadt, Germany
 
  The heavy ion synchrotron SIS18 at GSI will serve as injector ring for the FAIR-facility and provide high intensity heavy ion beams. The operation of such beams requires the usage of low charge states, which have high cross sections for ionization. To overcome this issue, many upgrade measure have been realized in the past decade, such as the installation of an ion catcher system with low desorption surfaces and coating 65% of the circumference of SIS18 with NEG to lower the static gas pressure. Since the vacuum dynamics during operation prevent the achievement of the intensity goals for FAIR, new concepts have to be developed, to increase the beam intensity. One idea is the installation of additional pumping speed in the form of cryogenic surfaces. Heavy residual gas components, which have the highest ionization cross sections can be cryopumped at moderate temperatures, i.e. already at 50-80 K. In fact, the only typical residual gas component which can not be pumped via cryosorption in this temperature regime is Hydrogen, which has a factor 50 lower ionization cross sections than Argon, the heaviest residual gas component. In this paper, we present a study of the integration of cryopanels into the vacuum chambers of SIS18.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-TUPMP054  
About • paper received ※ 13 May 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019  
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WEYYPLM2 The 2018 Heavy-Ion Run of the LHC luminosity, optics, experiment, proton 2258
 
  • J.M. Jowett, C. Bahamonde Castro, W. Bartmann, C. Bracco, R. Bruce, J. Coello, J. Dilly, S.D. Fartoukh, E. Fol, N. Fuster-Martínez, A. Garcia-Tabares, M. Hofer, E.B. Holzer, M.A. Jebramcik, J. Keintzel, A. Lechner, E.H. Maclean, L. Malina, T. Medvedeva, A. Mereghetti, T. H. B. Persson, B.Aa. Petersen, S. Redaelli, B. Salvachua, M. Schaumann, C. Schwick, M. Solfaroli, M.L. Spitznagel, H. Timko, R. Tomás, A. Wegscheider, J. Wenninger, D. Wollmann
    CERN, Geneva, Switzerland
  • D. Mirarchi
    The University of Manchester, The Photon Science Institute, Manchester, United Kingdom
 
  The fourth one-month Pb-Pb collision run brought LHC Run 2 to an end in December 2018. Following the tendency to reduce dependence on the configuration of the preceding proton run, a completely new optics cycle with the strongest ever focussing at the ALICE and LHCb experiments was designed and rapidly implemented, demonstrating the maturity of the collider’s operating modes. Beam-loss monitor thresholds were carefully adjusted to provide optimal protection from the multiple loss mechanisms in heavy-ion operation. A switch from a basic bunch-spacing of 100 ns to 75 ns was made as the beam became available from the injector chain. A new record luminosity, 6 times the original design and close to the operating value proposed for HL-LHC, provided validation of the strategy for mitigating quenches due to bound-free pair production (BFPP) at the interaction points of the ATLAS and CMS experiments. Most of the beam parameters of the HL-LHC Pb-Pb upgrade were attained during this run and the integrated luminosity goals for the first 10 years of LHC operation were substantially exceeded.  
slides icon Slides WEYYPLM2 [10.884 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEYYPLM2  
About • paper received ※ 08 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019  
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WEPMP005 Beam Line Optimization Using Derivative-Free Algorithms experiment, target, site, interface 2307
 
  • S. Appel, S. Reimann
    GSI, Darmstadt, Germany
 
  The present study focuses on the beam line optimization from the heavy-ion synchrotron SIS18 to the HADES experiment. BOBYQA (Bound Optimization BY Quadratic Approximation) solves bound constrained optimization problems without using derivatives of the objective function. The Bayesian optimization is an other strategy for global optimization of costly, noisy functions without using derivatives. A python programming interface to MADX allow the use of the python implementation of BOBYQA and Bayesian method. This gave the possibility to use tracking simulation with MADX to determine the loss budget for each lattice setting during the optimization and compare both optimization methods.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPMP005  
About • paper received ※ 29 April 2019       paper accepted ※ 21 May 2019       issue date ※ 21 June 2019  
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WEPRB012 Overview on SC CH-Cavity Development cavity, linac, SRF, status 2822
 
  • M. Busch, M. Basten, T. Conrad, P. Müller, H. Podlech, M. Schwarz
    IAP, Frankfurt am Main, Germany
  • W.A. Barth, F.D. Dziuba, M. Miski-Oglu
    GSI, Darmstadt, Germany
  • W.A. Barth, F.D. Dziuba, M. Miski-Oglu
    HIM, Mainz, Germany
  • W.A. Barth
    MEPhI, Moscow, Russia
  • F.D. Dziuba
    IKP, Mainz, Germany
 
  Funding: Work supported by GSI, HIC for FAIR, BMBF Contr. No. 05P18RFRB1
During the last decades an enermous effort has been put into the development of low beta structures for hadron acceleration worldwide. Since hadrons exhibit a very inert velocity gain due to their high mass this change in speed has to be taken into account when utilizing low beta cavities. At the Institute of Applied Physics (IAP), Frankfurt, Germany, five multi-cell CH-cavities (Crossbar H-Mode) have been developed and tested for different kind of applications so far. In addition to the successfully tested original 360 MHz prototype further structures envisaged for beam operation have been fabricated and tested. Overview, status and outlook of this cavity technology is topic of this contribution.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPRB012  
About • paper received ※ 08 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019  
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WEPRB014 Further RF Measurements on the Superconducting 217 MHz CH Demonstrator Cavity for a CW Linac at GSI cavity, linac, MMI, operation 2826
 
  • F.D. Dziuba, K. Aulenbacher, W.A. Barth, C. Burandt, V. Gettmann, T. Kürzeder, S. Lauber, J. List, M. Miski-Oglu
    HIM, Mainz, Germany
  • K. Aulenbacher
    IKP, Mainz, Germany
  • K. Aulenbacher, W.A. Barth, C. Burandt, V. Gettmann, M. Heilmann, T. Kürzeder, S. Lauber, J. List, M. Miski-Oglu, J. Salvatore, A. Schnase, S. Yaramyshev
    GSI, Darmstadt, Germany
  • M. Basten, M. Busch, T. Conrad, H. Podlech, M. Schwarz
    IAP, Frankfurt am Main, Germany
  • S. Lauber, J. List
    KPH, Mainz, Germany
 
  Funding: Work supported by GSI, HIM, BMBF Contr. No. 05P18UMRB2
Recently, the first section of the superconducting (sc) continuous wave (cw) Linac has been extensively tested with heavy ion beam from the GSI High Charge State Injector (HLI). During this testing phase, the reliable operability of 217 MHz multi gap crossbar-H-mode (CH) cavities has been successfully demonstrated. The sc 217 MHz CH cavity (CH0) of the demonstrator setup accelerated heavy ions up to the design beam energy and even beyond at high beam intensities and full transmission. This worldwide first beam test with a sc CH cavity is a major milestone on the way realizing the entire sc cw Linac project. In this contribution further RF measurements on the cavity are presented providing full characterization of the RF structure.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPRB014  
About • paper received ※ 26 April 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019  
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WEPRB015 Cleanroom Installations for SRF Cavities at the Helmholtz-Institut Mainz cavity, operation, vacuum, SRF 2830
 
  • T. Kürzeder, K. Aulenbacher, W.A. Barth, C. Burandt, F.D. Dziuba, V. Gettmann, R.G. Heine, S. Lauber, J. List, M. Miski-Oglu
    HIM, Mainz, Germany
  • K. Aulenbacher, F.D. Dziuba
    IKP, Mainz, Germany
  • W.A. Barth, C. Burandt, V. Gettmann, M. Miski-Oglu, S. Yaramyshev
    GSI, Darmstadt, Germany
  • J. Conrad
    TU Darmstadt, Darmstadt, Germany
  • R.G. Heine, F. Hug, T. Stengler
    KPH, Mainz, Germany
 
  At the Helmholtz-Institut Mainz (HIM) a cleanroom has been equipped with new tools and installations for the planned treatment of different superconducting RF-cavities. At first TESLA/XFEL type 9-cell cavities for the Mainz Energy-Recovering Superconducting Accelerator (MESA) project or 217 MHz multigap Crossbar H-mode cavities for the HElmholtz LInear ACcelerator (HELIAC) under development by HIM and GSI will be treated. The cleanroom installations, including the greyroom, cover an area of about 155 sqm. In its ISO-class 6 area a large ultrasonic and a conductance rinsing bath has been installed recently. A high pressure rinsing cabinet (HPR) has been implemented between the ISO-class 6 and 4 cleanroom. A RF-cavity can be loaded and unloaded from both sides. HPR treatments are possible for cavities of up to 1.4 m length and about 0.7 m diameter. For drying the ISO-class 4 clean room is equipped with a 160 C vacuum oven. New cleanroom lifters allow the handling of up to 200 kg heavy objects. A rail system in the cleanroom floor is installed to move out the entire cold string of the cleanroom after assembly and leak testing. First operational experiences with this facility will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPRB015  
About • paper received ※ 29 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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THPMP005 Charge Stripping at High Energy Heavy Ion Linacs linac, target, acceleration, ion-source 3452
 
  • W.A. Barth, S. Yaramyshev
    GSI, Darmstadt, Germany
  • W.A. Barth
    HIM, Mainz, Germany
  • W.A. Barth, T. Kulevoy, S.M. Polozov, S. Yaramyshev
    MEPhI, Moscow, Russia
  • A.S. Fomichev, L.V. Grigorenko
    JINR, Dubna, Moscow Region, Russia
  • T. Kulevoy
    NRC, Moscow, Russia
 
  For heavy-ion accelerator facilities charge stripping is a key Technology: the stripping charge state, its efficiency to produce ions in the required charge state, and the beam quality after stripping substantially determine the entire accelerator performance. Modern heavy ion accelerator facilities such as the future Facility for Antiproton and Ion Research (FAIR) at GSI provide for high intensity heavy ion beams beyond 200 MeV/u. Heavy ion stripping at a lower energy enables more efficient acceleration up to the final beam energy, compared to acceleration of ions with a low charge state. Due to the high power deposited by the heavy ions in the stripping media and radiation damages if a solid target is used, self-recovering stripper media must be applied. General implementation options for different stripper target media are discussed in this paper, as well as general considerations to optimize the Linac layout through the appropriate choice of stripping medium and stripping energy. The driver Linac for the Dubna Electron-Radioactive Isotope Collider fAcility (DERICA) project, recently initiated by JINR, is foreseen to provide for 100 MeV/u Uranium beam in continuous wave mode. First layout scenarios of a one-step and a two-step DERICA-stripper approach will be also presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPMP005  
About • paper received ※ 22 April 2019       paper accepted ※ 21 May 2019       issue date ※ 21 June 2019  
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THPMP006 Study on the Theta Pinch Plasmas for Applied as Ion Stripper plasma, electron, experiment, target 3456
 
  • K. Cistakov, Ph. Christ, M. Fröhlich, M. Iberler, J. Jacoby, L. Manganelli, G. Xu
    IAP, Frankfurt am Main, Germany
  • R. Gavrilin, A. Khurchiev, S.M. Savin
    ITEP, Moscow, Russia
 
  Funding: Work supported by BMBF contr. No. 05P18RFRB1
With regard to the development of new accelerator technologies for high-intensity ion beams and more efficient acceleration, the transfer of radiation ions to higher charged states is a prerequisite for many experiments. However, the recent stripping technologies such as film and gas stripper for heavy ion beams with the desired intensities required great effort or are not suitable. The contribution presents the current state of plasma strippers with fully ionized hydrogen with simultaneously high particle densities in the range of some 1017 cm-3 for FAIR. To achieve this high particle density, an inductive discharge plasma is ignited within a stripper cell parallel to the axis of the ion beam and compressed towards the beam axis. The advantage over conventional ion strippers is about 1000 times smaller recombination rate for electrons*. This significantly increases the equilibrium charge state of ions. At the same time, the relative fraction of ions on the maximum of charge state distribution increases up to 25%**. This should create good conditions for the use of plasma strippers at FAIR.
*Th.Peter, "Energy loss of heavy ions in dense plasma"
**O.Haas, "Simulation Studies of plasma-based charge strippers",Proceedings of IPAC 2015, Richmond, VA, USA
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPMP006  
About • paper received ※ 15 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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THPMP025 Modern Heavy Ion Based Test Facilities For Spacecrafts Electronics Qualification radiation, detector, monitoring, electron 3497
 
  • P.A. Chubunov
    ISDE, Moscow, Russia
  • V.S. Anashin
    United Rocket and Space Corporation, Institute of Space Device Engineering, Moscow, Russia
  • I.V. Kalagin, S.V. Mitrofanov, V.A. Skuratov
    JINR, Dubna, Moscow Region, Russia
 
  All spacecraft electronics should be subject to radiation hardness qualifications. For modern semiconductor technologies, individual high-energy particles of outer space are the greatest danger, causing upsets and failures in satellite equipment. For ground tests at single event effects, heavy ion-based modeling facilities are used. The report describes the test benches used for testing space-based electronics, created on the basis of the U-400, U-400M ion accelerators in the FLNR JINR (Dubna, Russia) at the request of ISDE (Moscow, Russia).  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPMP025  
About • paper received ※ 18 May 2019       paper accepted ※ 26 May 2019       issue date ※ 21 June 2019  
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THPGW041 The Potential of Heavy Ion Beams to Provide Secondary Muon/Neutrino Beam target, proton, solenoid, experiment 3673
 
  • H.-J. Cai, L.W. Chen, L. Yang, S. Zhang
    IMP/CAS, Lanzhou, People’s Republic of China
 
  This paper focuses on the exploration into the potential of heavy ion beams for the production of the charged pions/muons within different energy ranges which is widely needed for fundamental and applied research. The investigation is performed for the different kinds of beams involving 1H , 4He, 12C, 16O, 40Ar and 136Xe with medium energy within the range of 0.5~2.5 AGeV and high energy of 10 AGeV. Three kinds of typical target configurations, thin graphite plate, long tungsten rod and medium thickness nickel block are adopted. For comparison, graphite and nickel are also used for the long rod geometry. Basically, most of the conventional charged pion/muon beams production cases including surface muon, low energy decay muon, medium energy pion/muon for neutrino beam and highly forward energetic muon are involved and the feasibility of heavy ion beam for these cases is analyzed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPGW041  
About • paper received ※ 15 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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