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Zvyagintsev, V.

Paper Title Page
MOP017 The Proposed ISAC-III (ARIEL) Low-Energy Area and Accelerator Upgrades 94
 
  • R.E. Laxdal, F. Ames, R.A. Baartman, M. Marchetto, M. Trinczek, F. Yan, V. Zvyagintsev
    TRIUMF, Vancouver
 
 

The ISAC-III proposal is a ten year plan to triple the amount of radioactive ion beam (RIB) time at the facility. The plan includes the addition of two new independent target stations with a design suitable for actinide target materials, a second 500 MeV proton beam line from the TRIUMF cyclotron and a new 50 MeV electron linac as a complementary driver to provide RIBs through photo-fission. The two new target stations will require a new mass-separator and low-energy beam-transport complex to deliver the additional beams to the ISAC experimental facilities. It is also proposed to install a new linear accelerator section to provide the capability for two simultaneous accelerated RIBs to experimenters. This paper will describe the proposed installations in the low-energy transport and accelerator sections of the ISAC complex.

 
MOP018 ISAC-II Superconducting Linac Upgrade - Design and Status 97
 
  • R.E. Laxdal, R.J. Dawson, M. Marchetto, A.K. Mitra, W.R. Rawnsley, T.C. Ries, I. Sekachev, V. Zvyagintsev
    TRIUMF, Vancouver
 
 

The ISAC-II superconducting linac, operational since April 2006, adds 20 MV accelerating potential to the ISAC Radioactive Ion Beam (RIB) facility. An upgrade to the linac, in progress, calls for the addition of a further 20 MV of accelerating structure by the end of 2009. The new installation consists of twenty 141 MHz quarter wave cavities at a design beta of 11%. The cavities will be housed in three cryomodules with six cavities in the first two cryomodules and eight cavities in the last. A second Linde TC50 refrigerator has been installed and commissioned to provide cooling for the new installation. The design incorporates several new features as improvements to the existing cryomodules. They include a four point support frame for the cavity strongback, a modified LN2 circuit internal to the cryomodule and a new design for the mechanical motion of the rf coupling loop. A summary of the design and the current status of the cryomodule production and supporting infrastructure will be presented.

 
MOP077 Beam Dynamics Studies on the EURISOL Driver Accelerator 257
 
  • A. Facco, A.I. Balabin, R. Paparella, D. Zenere
    INFN/LNL, Legnaro, Padova
  • D. Berkovits, J. Rodnizki
    Soreq NRC, Yavne
  • J.-L. Biarrotte, S. Bousson, A. Ponton
    IPN, Orsay
  • R.D. Duperrier, D. Uriot
    CEA, Gif-sur-Yvette
  • V. Zvyagintsev
    TRIUMF, Vancouver
 
 

Funding: We acknowledge the financial support of the European Community under the FP6 "Research Infrastructure Action-Structuring the European Research Area" EURISOL DS Project Contract No. 515768 RIDS.
A 1 GeV, 5 mA cw superconducting proton/H- linac, with the capability of supplying cw primary beam to up to four targets simultaneously by means of a new beam splitting scheme, is under study in the framework of the EURISOL DS project which aims to produce an engineering-oriented design of a next generation European Radioactive beam facility. The EURISOL driver accelerator would be able to accelerate also a 100 muA 3He beam up to 2 GeV, and a 5 mA deuteron beam up to 200 MeV. The linac characteristics and the status of the beam dynamics studies will be presented.

 
THP002 The 1.3 GHz Superconducting RF Program at TRIUMF 774
 
  • R.E. Laxdal, K. Fong, A. Grassellino, A.K. Mitra, I. Sekachev, V. Zvyagintsev
    TRIUMF, Vancouver
  • R.S. Orr, W. Trischuk
    University of Toronto, Toronto, Ontario
 
 

TRIUMF is proposing to build a 50 MeV electron linac as a driver to produce radioactive ion beams through photofission. The present design calls for the use of nine-cell 1.3 GHz Tesla type cavities. A 1.3 GHz Superconducting RF (SRF) program has been initiated with the goal to produce and test one nine cell cavity by the end of 2009. The program will utilize the existing clean room and SRF test facilities that support the ISAC-II heavy ion superconducting linac. A vertical cryostat has been modified with a new insert to allow single cell testing. Pumps for 2 K sub-atmospheric operation have been tested. A single cell fabrication program is being initiated with a local company. A RRR measurement program is on-going to test cavity welds. The goal of the 1.3 GHz upgrade is to not only produce cavities for the in house project but to broaden TRIUMF's technical base for future potential collaborations. The paper will report the progress and plans of the 1.3 GHz SRF program.

 

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Slides

 
THP003 Production and Testing of Two 141 MHz Prototype Quarter Wave Cavities for ISAC-II 777
 
  • R.E. Laxdal, R.J. Dawson, K. Fong, A. Grassellino, M. Marchetto, A.K. Mitra, T.C. Ries, V. Zvyagintsev
    TRIUMF, Vancouver
  • R. Edinger
    PAVAC, Richmond, B.C.
 
 

The medium beta section of the ISAC-II superconducting linac (β=5.7% and 7.1%) has been operational since April 2006 providing 20 MV of accelerating potential at 106 MHz. The ‘high beta' extension to the linac, in progress, will see the addition of twenty 141 MHz quarter wave cavities at β=11%. The design specification calls for cw operation at a voltage gain of at least 1.1 MV/cavity for no more than 7 W of power dissipated in the cavity. This operation point corresponds to challenging peak surface fields of 30 MV/m and 60 mT. The cavity design is similar in concept to the medium beta cavities except for the addition of a drift tube to render symmetric the accelerating fields. A prototyping and qualification program was initiated with PAVAC Industries Inc. of Richmond, B.C. Two full size models in copper and two in niobium have been completed. The niobium cavities have been warm and cold-tested and characterized for frequency, rf performance and mechanical stability. The cold performance of both cavities exceeds the specification and the final frequency is within tuning range. The design, fabrication details and test results will be presented.

 
THP004 Performance of the ISAC-II 141 MHz Solid State Amplifier 780
 
  • A.K. Mitra, I.V. Bylinskii, K. Fong, R.E. Laxdal, J. Lu, R.W. Shanks, V. Zvyagintsev
    TRIUMF, Vancouver
 
 

The ISAC-II linac extension requires an additional 20 rf amplifiers to power twenty 141 MHz quarter wave superconducting cavities. Solid state amplifiers will be used for this extension as compared to tube amplifiers which have been employed for the existing ISAC-II linac section, operational since 2006. The amplifiers are specified to run with an output power of 600 W. The first amplifier of the production series has been tested for gain and phase linearity. Phase noise of this amplifier has been measured on a 141 MHz superconducting cavity and compared with phase noise measured with a tube amplifier. The test results and general rf, interlock and interface requirements are verified against tendered specification before series production of the remaining amplifiers can proceed. Benchmarking tests of the prototype amplifier will be reported.