ESS Docs Document 115-v1

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Multipacting Analysis for the Superconducting RF Cavity HOM Couplers in ESS

Document #:
ESS-doc-115-v1
Document type:
Conference Proceedings
Submitted by:
Stephen Molloy
Updated by:
Stephen Molloy
Document Created:
12 Sep 2011, 15:46
Contents Revised:
12 Sep 2011, 15:46
DB Info Revised:
12 Sep 2011, 15:46
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Abstract:
The European Spallation Source (ESS) linac will consist of three families of superconducting RF cavities to accel- erate protons to the required 5 MW for collision with the target. If it is determined that HOM damping is required to limit the effect of beam induced modes, it is quite likely that HOM couplers will be installed. Multipacting in these couplers is a concern as thermally induced detuning of the fundamental notch filter has limited the achievable gradient in other high power machines. It is therefore important to avoid potential multipacting conditions during the design phase. Presented here are simulations using the Track3P code developed at SLAC. Multipacting regions are high- lighted, electron trajectories are shown, and suitability of the proposed HOM coupler design is discussed.
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Associated with Events:
IPAC'11 held from 05 Sep 2011 to 09 Sep 2011 in San Sebastian, Spain
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