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Horan, D.

Paper Title Page
TU5PFP077 Improvements to RF Cavity Input Couplers at the Advanced Photon Source 1005
 
  • D. Horan, D.J. Bromberek, L.H. Morrison, G.J. Waldschmidt
    ANL, Argonne
  
 

Funding: U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357


Work is underway to improve the reilability and power handling capability of input couplers used in the Advanced Photon Source single-cell and five-cell cavities. Coupler performance during conditioning in a test cavity suggests that ceramic material defects and field enhancement caused by a mechanical gap in the coupler design may be responsible for past coupler failures at high power. Simulation results and high-power test data will be discussed.

  
TU5PFP078 352-MHz Solid-State RF Power System Development at the Advanced Photon Source 1008
 
  • D. Horan, B. Brajuskovic, J.T. Collins, L.H. Morrison, G.J. Waldschmidt
    ANL, Argonne
  
 

Funding: U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.


An investigation into development of a 200-kW CW solid state rf power system design to replace the existing klystron-based 352-MHz rf systems at the Advanced Photon Source has been started. The baseline 352-MHz solid state system design will consist of multiple 1-kW CW modules combined to produce a total output capability of 200-kW CW, sufficient to drive one single-cell storage ring cavity. A description of the 1-kW CW module building block of the solid state power sistem will be presented, along with results from hardware evaluation tests at the 1-kW CW level.

  
TU5PFP079 A Status Report on the Advanced Photon Source 2-MW DC Resistive Load 1011
 
  • G. Trento, D. Horan, E. Swetin, G.J. Waldschmidt
    ANL, Argonne
  
 

Funding: Work supported by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.


The redesign, construction, and high-power testing of a 95-kV DC, 2MW water-cooled resistive load has been completed. This load was built and installed to test and troubleshoot the Advanced Photon Source (APS) 352-MHz high –voltage klystron power supplies. The original resistive load*,** was modified to enhance and improve the load performance .In this paper, we describe the redesign of the DC load, report on the recent test results, and discuss it’s performance improvements.


*D. Horan et al., “A 2-Megawatt Load for Testing High Voltage DC Power Supplies”.
** D. Horan et al., “Performance of a 2-Megawatt High Voltage test Load”.