[PEPPo] Capture Cavity Abstract draft for LCWS2024

[Robert Rimmer]

Hi Shaoheng, looks good. I assume by radiation you include particle losses in the structure? Should we mention that the system may need to be flexible to capture different parts of the positron distribution for different users? (e.g. maximum yield vs. maximum polarization?)
Bob.

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From: PEPPo <peppo-bounces at jlab.org> on behalf of Shaoheng Wang via PEPPo <peppo at jlab.org>
Sent: Tuesday, April 30, 2024 10:49 AM
To: Joe Grames via PEPPo <peppo at jlab.org>
Subject: [PEPPo] Capture Cavity Abstract draft for LCWS2024

Dear Colleagues,

I prepared an abstract draft for LCWS2024, see below. And I'm asking for help for  your input, corrections and comments about the abstract. Thank you!


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Title
Capture Cavities for the CW Polarized Positron Source Ce+BAF
S. Wang, J. Grames, N. Raut, R. Rimmer, Y. Roblin, A. Ushakov, H. Wang

Abstract
The initial design of the capture cavities for the continuous wave (CW) polarized positron beams at  Jefferson Lab (Ce+BAF) is presented. A chain of standing wave multi-cell copper cavities inside a solenoid tunnel are selected to bunch/capture positrons. The cavity design strategy is presented to accommodate constrains from the large phase distribution of the incident beams, RF power, radiation and RF heating, beam loading, etc. to improve the capture efficiency. A matrix of design parameters' range are given for future system optimization when the the capture cavities are considered together with other sub-systems and beam dynamics. The contents will also be useful for other CW cavity design for beams with large phase space distribution.
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Best
Shaoheng
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