Keyword: cryomodule
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MOPM3P01 Beam Optics Simulations Study on the Pre-Stripper Linac for Rare Isotope Science Project linac, simulation, ion, cavity 31
 
  • J.-W. Kim, J.-H. Jang, H. Jin
    IBS, Daejeon, Republic of Korea
  • Z.A. Conway, B. Mustapha, P.N. Ostroumov
    ANL, Argonne, Illinois, USA
 
  Funding: This work was supported by the Rare Isotope Science Project of the Institute for Basic Science funded by the Ministry of Science, ICT and Future Planning and the National Research Foundation of Korea.
The rare isotope science project (RISP) under development in Korea aims to provide various heavy-ion beams for nuclear and applied science users. A pre-stripper linac is the first superconducting section to be constructed for the acceleration of both stable and radioisotope beams to the energy of 18.5 Mev/u with a DC equivalent voltage of 160 MV. The current baseline design consists of an ECR ion source, an RFQ, cryomodules with QWR and HWR cavities and quadruple focusing magnets in the warm sections between cryomodules. Recently we have developed an alternative design in collaboration with Argonne's Linac Development Group to layout the linac based on state-of-the-art ANL's QWR operating at 81.25 MHz and multi-cavity cryomodules of the type used for the ATLAS upgrade and Fermilab PIP-II projects. End-to-end beam dynamics calculations have been performed to ensure an optimized design with no beam losses. The numbers of required cavities and cryomodules are significantly reduced in the alternative design. The results of beam optics simulations and error sensitivity studies are discussed.
 
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TUAM3Y01 Beam Dynamics Challenges in the ESS Linac linac, rfq, lattice, DTL 315
 
  • Y.I. Levinsen, R. De Prisco, M. Eshraqi, R. Miyamoto, M. Muñoz, A. Ponton
    ESS, Lund, Sweden
 
  The European Spallation Source will be the worlds brightest neutron source. It will be driven by a 5~MW proton linac that delivers a 2.86~ms pulse at 14~Hz, which means the peak beam power is 125~MW. This requires a careful design of the lattice structures in order to allow for safe and reliable operation of the accelerator. We will discuss some of the design choices and some of the particular challenges that were faced during the design of the ESS lattice.  
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WEAM4Y01 Design and Prototyping of the Spoke Cyromodule for ESS cavity, cryogenics, vacuum, linac 416
 
  • P. Duthil, S. Bousson, S. Brault, F. Chatelet, P. Duchesne, N. Gandolfo, D. Longuevergne, G. Olry, M. Pierens, E. Rampnoux, D. Reynet
    IPN, Orsay, France
  • C. Darve, N. Elias
    ESS, Lund, Sweden
 
  A cryomodule integrating two superconducting radiofrequency (SRF) double Spoke cavities and their RF power couplers is now being assembled at IPNO. It is the prototype version of the 13 future cryomodules composing a 56 meters long double Spoke section which will be operated for the first time in a linear accelerator (linac) for the European Spallation Source (ESS). ESS will be the most powerful neutron source feeding multidisplinary researches. This cryomodule provides the cryogenic environment for operating the two '=0.5 cavities at full power in a saturated superfluid helium bath at a temperature of 2 K. Thermally and magnetically shielded, they will each be fed by a 352 MHz electromagnetic wave, with a peak power of 400 kW, to generate an accelerating pulsed field of 9MV/m. For this operation, the prototype cryomodules includes all the interfaces with RF, cryogenics, vacuum, beam pipe and diagnostics. It will be tested by 2016 at IPNO by use of a test valve box which is also a prototype of the future Spoke cryogenic distribution system, another contribution to ESS. Both prototypes will then be tested at full power at Uppsala university FREIA facilities.  
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