Keyword: solenoid
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TUA2WC01 Discussion on SARAF-LINAC Cryomodules cavity, cryomodule, linac, controls 80
 
  • N. Pichoff
    CEA/IRFU, Gif-sur-Yvette, France
  • D. Chirpaz-Cerbat, R. Cubizolles, J. Dumas, R.D. Duperrier, G. Ferrand, B. Gastineau, F. Leseigneur, C. Madec, Th. Plaisant, J. Plouin
    IRFU, CEA, University Paris-Saclay, Gif-sur-Yvette, France
 
  CEA is in charge of the design, construction, installation and commissioning at SNRC of the Linac of the SARAF project. The linac is composed of an MEBT and a Superconducting linac (SCL) integrating 4 cryomodules. Nowadays, the HWR cavities and superconducting magnets prototypes are being built. The Critical Design Review of the cryomodules has just been passed in March 2018. This paper present the status of the SARAF-LINAC cryomodules.  
slides icon Slides TUA2WC01 [14.245 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-TUA2WC01  
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WEP2PO027 Simulation of the Axial Injection Beam Line of the Reconstructed U200 Cyclotron of FLNR JINR cyclotron, ECR, injection, emittance 319
 
  • N.Yu. Kazarinov, J. Franko, G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin
    JINR, Dubna, Moscow Region, Russia
 
  Flerov Laboratory of Nuclear Reaction of Joint Institute for Nuclear Research begin the works under reconstruction of the cyclotron U200. The reconstructed cyclotron is intended for acceleration of heavy ions with mass-to-charge ratio A/Z within interval from 5 to 8 up to the fixed energies 3.5 and 5.3 MeV per unit mass. The intensity of the accelerated ions will be about 3 pmcA for lighter ions (A< 40) and about 0.3 pmcA for heavier ions (A<132). The cyclotron will be used in the microchip testing, production of the track pore membranes and for applied physics. The injection into cyclotron will be realized from the external superconducting ECR ion source. The simulation of the axial injection system of the cyclotron is presented in this report.  
poster icon Poster WEP2PO027 [0.679 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP2PO027  
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THP2WB05 Halo Formation of the High Intensity Beams in a Periodic Solenoidal Fields space-charge, resonance, focusing, lattice 387
 
  • Y.L. Cheon, M. Chung
    UNIST, Ulsan, Republic of Korea
 
  Funding: This research was supported by the National Research Foundation of Korea (Grant No. NRF-2017M1A7A1A02016413).
Transport of intense beams over long distances can be restricted by space-charge fields which force the trajectories of charged particles to deviate from the stable regions of propagation. The space-charge fields can be calculated from the density distribution of the beam particles, and Poisson's equation. As the space-charge term is put in the equations of motion, it affects the envelope equations and betatron wave number of a charged particle in the beam. Also, with different initial conditions of the beam particles, there can be perturbations on the matched beam envelopes which can generate a resonant interaction between the beam core and test particles. Unlike for the K-V beam, for nonuniform density beams such as Gaussian beams in the periodic quadrupole or solenoidal focusing fields, there exists higher order terms and non-periodic solutions of beam particle oscillations, which can generate halo regions and chaotic motions during the beam propagation. In this study, we have investigated the higher order resonances and non-periodic solutions of the Gaussian beam in the solenoidal focusing fields to understand halo formation mechanisms of the intense beams.
 
slides icon Slides THP2WB05 [2.295 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP2WB05  
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THP2WC01 The FNAL Booster Second Harmonic RF Cavity cavity, booster, impedance, cathode 434
 
  • R.L. Madrak, J.E. Dey, K.L. Duel, M.R. Kufer, J. Kuharik, A.V. Makarov, R.D. Padilla, W. Pellico, J. Reid, G.V. Romanov, M. Slabaugh, D. Sun, C.-Y. Tan, I. Terechkine
    Fermilab, Batavia, Illinois, USA
 
  Funding: Operated by Fermi Research Alliance, LLC under Contract No. DEAC02- 07CH11359 with the United States Department of Energy.
A second harmonic RF cavity which uses perpendicularly biased garnet for frequency tuning is currently being constructed for use in the Fermilab Booster. The cavity will operate at twice the fundamental RF frequency, from ~76 - 106 MHz, and will be turned on only during injection, and transition or extraction. Its main purpose is to reduce beam loss as required by Fermilab's Proton Improvement Plan (PIP). After three years of optimization and study, the cavity design has been finalized and all constituent parts have been received. We discuss the design aspects of the cavity and its associated systems, component testing, and status of the cavity construction.
 
slides icon Slides THP2WC01 [16.734 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP2WC01  
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