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TUPRI069 NSLS-II Commissioning with 500 MHZ 7-CELL PETRA-III Cavity storage-ring, cavity, feedback, synchrotron 1724
 
  • A. Blednykh, G. Bassi, W.X. Cheng, J. Choi, Y. Hidaka, S.L. Kramer, Y. Li, B. Podobedov, J. Rose, T.V. Shaftan, G.M. Wang, F.J. Willeke, L.-H. Yu
    BNL, Upton, Long Island, New York, USA
 
  The NSLS-II storage ring has been commissioned during Phase 1 with 500 MHz 7-cell PETRA-III RF cavity. In this paper we present our first beam-measured data on instabilities and collective effects with a normal conducting RF system.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRI069  
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WEPRO064 Recent Results of the HESR RF System operation, cavity, impedance, electron 2094
 
  • R. Stassen, F.J. Etzkorn, R. Greven, T. Katayama, R. Maier, G. Schug, H. Stockhorst
    FZJ, Jülich, Germany
 
  The FAIR complex (Facility for Antiprotons and Ion Research) will be built in different stages. Due to the postponed RESR in the first stage, both RF-cavities of the HESR have to operate in different modes to achieve the required beam quantity and quality. The RF-system of the HESR will now consists of two identical cavities with a common low-level RF control (LLRF). Both cavities will be driven by low noise solid state amplifiers. Each cavity contains of one gap and two tanks operating in push-pull mode and each tank will house 6 ring cores wound of modern magnetic nano-alloy ribbon. Meanwhile all ring cores were delivered and first results at low power and at high power will be presented. The construction of the new air cooling concept is now in the final stage.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO064  
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WEPME041 Vacuum Acceptance Tests for the UHV Room Temperature Vacuum System of the LHC during LS1 vacuum, injection, ion, controls 2357
 
  • G. Cattenoz, V. Baglin, G. Bregliozzi, D. Calegari, P. Chiggiato, J.E. Gallagher, A. Marraffa
    CERN, Geneva, Switzerland
 
  During the CERN Large Hadron Collider (LHC) first long shut down (LS1), a large number of vacuum tests are carried out on consolidated or newly fabricated pieces of equipment. In such a way, the vacuum compatibility is assessed before installation in the UHV system of the LHC. According to the equipment’s nature, the vacuum acceptance tests consist in functional checks, leak tests, outgassing rate measurements, evaluation of contaminants by Residual Gas Analysis (RGA), pumping speed measurements, and qualification of the sticking probability of Non-Evaporable-Getter coating. In this paper, the methods used for the tests and the acceptance criteria are described. A summary of the measured vacuum characteristics for the tested components is also given.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME041  
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