A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Ambattu, P. K.

Paper Title Page
MOPP009 Copper Prototype Measurements of the HOM, LOM and SOM Couplers for the ILC Crab Cavity 568
 
  • G. Burt, P. K. Ambattu, A. C. Dexter
    Cockcroft Institute, Lancaster University, Lancaster
  • L. Bellantoni
    Fermilab, Batavia, Illinois
  • P. Goudket, P. A. McIntosh
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • Z. Li, L. Xiao
    SLAC, Menlo Park, California
 
  The ILC Crab Cavity is positioned close to the IP and hence is very sensitive to the wakefields induced by the beam. A set of couplers were designed to couple to and hence damp the spurious modes of the crab cavity. As the crab cavity is a deflecting mode cavity, it operates using a dipole mode and has different damping requirements than an accelerating mode cavity. A separate coupler is required for the monopole modes below the operating frequency of 3.9 GHz, known as the LOMs, the opposite polarization of the operating mode, the SOM, and the modes above the operating frequency, the HOMs. Each of these couplers have been manufactured out of copper and measured attached to an aluminium nine cell prototype of the cavity and their external Q factors were measured. The results were found to agree well with numerical simulations.  
MOPP125 A Superconducting RF Vertical Test Facility at Daresbury Laboratory 850
 
  • P. A. Corlett, R. Bate, C. D. Beard, B. D. Fell, P. Goudket, S. M. Pattalwar
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • P. K. Ambattu, G. Burt, A. C. Dexter, M. I. Tahir
    Cockcroft Institute, Lancaster University, Lancaster
 
  A superconducting RF vertical test facility (VTF) has been constructed at Daresbury Laboratory for the testing of superconducting RF cavities at 2K. When fully operational, the facility will be capable of testing a 9-cell 1.3 GHz Tesla type cavity. The facility is initially to be configured to perform phase synchronisation experiments between a pair of single cell 3.9GHz ILC crab cavities. These experiments require the cavities to operate at the same frequency; therefore a tuning mechanism has been integrated into the system. The system is described, and data from the initial operation of the facility is presented.