TU1  —  Tuesday Oral Session TU1   (30-Sep-08   08:30—10:30)

Chair: Y. Yamazaki, JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken

Paper Title Page
TU101 Unique Features of the J-PARC Linac and Its Performance - Lessons Learnt 343
 
  • A. Ueno
    KEK/JAEA, Ibaraki-Ken
 
 

The J-PARC linac has been successfully commissioned up to its design energy and almost design peak intensity. The unique methods and hardware features adopted in the J-PARC linac, such as the Cs-free H- ion source, macro-pulse generation method, stable one-shot operation method, rf chopper system related with the J-PARC 30mA-RFQ (Radio Frequency Quadrupole linac) design and its operation parameter, one-turn injection method into the following J-PARC RCS (Rapid Cycling Synchrotron), transverse matching using TRACE3D PMQ (Permanent Magnet Quadrupole) elements approximating the fringe field effects of the electro-quadrupole magnets, 2 cavity behavior of SDTL (Separated Drift tube Linac) fed with one Klystron and so on, will be reported in this talk.

 

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TU102 Status of the Construction of the SPIRAL2 Accelerator at GANIL 348
 
  • T. Junquera
    IPN, Orsay
 
 

The superconducting linac for the SPIRAL2 radioactive ion beam facility at GANIL is in the construction phase. The prototype components have been constructed and are being tested. A status report on the activities and future plans will be given.

 

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TU103 CERN Linac Upgrade Activities 353
 
  • A.M. Lombardi
    CERN, Geneva
 
 

In its June 2007 session the CERN Council has approved the White Paper, which includes construction of a 160 MeV H- linear accelerator called LINAC4, and the study of a 4 GeV Superconducting Proton Linac (SPL). LINAC4 will initially replace LINAC2 as the injector to the PS Booster, improving its performance up to the levels required for producing the ultimate LHC luminosity. In a later stage, LINAC4 is intended to become the front-end of SPL in a renewed injection chain for the LHC, which could be progressively constructed over the next decade. After briefly introducing the motivations and layout of the new injector chain, the talk will present the characteristics of the new linacs and give an overview of their main technical features and the R&D activities pursued within the HIPPI Joint Research Activity.

 

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TU104 Laser Acceleration of Quasi-Monoenergetic MeV-GeV Ion Beams 358
 
  • J.C. Fernandez
    LANL, Los Alamos, New Mexico
 
 

Laser interactions with thin solid targets can produce sheath fields of tens of TV/m, which have been used to accelerate ions to several MeV with ps pulse lengths, high currents, and low transverse emittance. While previous results have had 100% energy spread, recent experiments using foils coated with a few monolayers have produced quasi-monoenergetic beams with 17% energy spread near 3 MeV. Such beams may be of interest as injectors or sources. Simulations show the potential for acceleration to hundreds of MeV or GeV energies using very thin foils.

 

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