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storage-ring

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MOP05 The HITRAP-Decelerator for Heavy Highly-Charged Ions ion, rfq, extraction, emittance 39
 
  • L. Dahl, W. Barth, T. Beier, W. Vinzenz
    GSI, Darmstadt
  • C. A. Kitegi, U. Ratzinger, A. Schempp
    IAP, Frankfurt-am-Main
  The GSI accelerator facility provides highly charged ions up to U92+ by stripping the ions at 400 MeV/u in the transfer line from the SIS18 (Heavy Ion Synchrotron) to the ESR (Experimental Storage Ring). The ESR provides high quality beams by means of stochastic cooling and electron cooling. Deceleration down to 4 MeV/u was already successfully demonstrated. After suitable rebunching, further deceleration down to 6 keV/u, neccessary for the capture of the ions by a penning trap, is done by IH/RFQ-structures. All cavities are operated at 108 MHz. Recently the HITRAP-project (Heavy Ion Trap), described in a Technical Design Report, was approved. The layout of the decelerator and the beam dynamics in different sections are reported.  
 
TUP09 The Heidelberg High Current Injector: A Versatile Injector for Storage Ring Experiments ion, rfq, ion-source, extraction 309
 
  • R. von Hahn, M. Grieser, R. Repnow, D. Schwalm, C.P. Welsch
    MPI-K, Heidelberg
  The High Current Injector (HCI) was designed and built as a dedicated injector for the Test Storage Ring in Heidelberg to deliver mainly singly charged Li- and Be-ions. After start for routine operation in 1999 the HCI delivered stable beams during the following years for about 50 % of the experiments with very high reliability. Due to the requirements from the experiment the HCI changed during that period from a machine for singly charged positive ions to an injector for a large variety of molecules as well as positively or negatively charged light ions. After successful commissioning of the custom built 18 GHz high power ECR-source at its present test location various modifications and additions were made in preparation of a possible conversion into an injector for highly charged heavy ions as a second phase. This paper gives an overview of the experience gained in the passed 5 years and presents the status of the upgrade of the HCI.  
 
TUP73 Beam Instrumentation Using BPM System of the SPring-8 Linac feedback, linac, synchrotron, booster 438
 
  • K. Yanagida, T. Asaka, H. Dewa, H. Hanaki, T. Kobayashi, A. Mizuno, S. Suzuki, T.  Taniuchi, H. Tomizawa
    JASRI-SPring-8, Hyogo
  A beam position monitor (BPM) system of the SPring-8 linac has been operated since 2002. The following upgrade programs have been carried out during this period: The BPMs were installed in the linac's dispersive sections. A synchronized accumulation of beam position data into the database system started. A feedback control of steering magnets for beam position stabilization has been under development. In this conference the authors report a performance of the BPM system, and discuss its usefulness for beam diagnostics, machine diagnostics and beam stabilization.