Author: Liao, K.C.
Paper Title Page
WEPPC029 Design and Development of an Octopus Thermometric System for the 704 MHz Single-cell SPL Cavity at CERN 2266
  • K.C. Liao, L. Arnaudon, O. Brunner, E. Ciapala, D.C. Glenat, W. Weingarten
    CERN, Geneva, Switzerland
  The octopus thermometric system is designed for the 704 MHz superconducting proton linac (SPL) cavity to detect hot spots and X-rays caused by normal conducting defects and the impact of emission electrons. This system features an octopus body and tentacle structure for good contact with the cavity and easy assembly, a multiplexing circuit with integrated microprocessor for efficient readout and a high density temperature sensor arrangement in order to complete a high resolution temperature and X-ray map. The first prototype is being manufactured and investigations are undergoing for further development.  
poster icon Poster WEPPC029 [1.715 MB]  
WEPPC030 Second Sound Measurement Using SMD Resistors to Simulate Quench Locations on the 704 MHz Single-cell Cavity at CERN 2269
  • K.C. Liao, O. Brunner, E. Ciapala, T. Junginger, W. Weingarten
    CERN, Geneva, Switzerland
  Oscillating superleak transducers (OSTs) containing a flexible porous membrane are widely used to detect the so-called second sound temperature wave when a quench event occurs in a superconducting RF cavity. In principle, from the measured speed of this wave and the travel time between the quench event and several OSTs, the location of the quench sites can be derived by triangulation. Second sound behavior has been simulated though different surface mount (SMD) resistors setups on a Superconducting Proton Linac (SPL) test cavity, to help understand the underlying physics and improve quench localisation. Experiments are described that have been conducted to search for explanation of heat transfer mechanism during cavity quench that causes contradictory triangulation results.  
poster icon Poster WEPPC030 [1.473 MB]