Author: Maesen, P.
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MOPB074 CERN’s Bulk Niobium High Gradient SRF Programme: Developments and Recent Cold Test Results 291
 
  • A. Macpherson, K.G. Hernández-Chahín, C. Jarrige, P. Maesen, F. Pillon, K.M. Schirm, R. Torres-Sanchez, N. Valverde Alonso
    CERN, Geneva, Switzerland
  • K.G. Hernández-Chahín
    DCI-UG, León, Mexico
 
  Recent results from the bulk niobium high-gradient cavity development program at CERN are presented, with particular focus on test results for the 704 MHz bulk niobium 5-cell elliptical cavity prototypes produced for the Superconducting Proton Linac (SPL) project. Successive cold tests of bare cavities have been used to refine the cavity preparation and testing process, with all steps done in-house at CERN. Current performance results are discussed with reference to observables such as ambient magnetic field, field emission levels, and quenches.  
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TUPB080 Diagnostic Developments at CERN’s SRF Testing Facility 778
 
  • A. Macpherson, S. Aull, A. Benoit, P.F. Fernández López, K.G. Hernández-Chahín, C. Jarrige, P. Maesen, K.M. Schirm, R. Torres-Sanchez, R. Valera Teruel
    CERN, Geneva, Switzerland
  • K.G. Hernández-Chahín
    DCI-UG, León, Mexico
  • T. Junginger
    HZB, Berlin, Germany
  • T. Junginger
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
 
  As part of CERN’s re-establishment of an SRF cold testing facility for bulk niobium cavities, diagnostic instrumentation and testing procedures on our vertical cryostat have been upgraded, with particular attention given to quench location, ambient magnetic field control, thermometry and thermal cycling techniques. In addition, preparation and measurement procedures have been addressed, allowing for improved measurement of cavity properties and detailed study of transient effects during the course of cavity testing.  
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