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Jay,</div>
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<br>
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Thanks. That is very helpful for the capture cavity design.</div>
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Shaoheng</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> PEPPo <peppo-bounces@jlab.org> on behalf of Jay Benesch via PEPPo <peppo@jlab.org><br>
<b>Sent:</b> Thursday, February 1, 2024 4:04 PM<br>
<b>To:</b> peppo@jlab.org <peppo@jlab.org><br>
<b>Subject:</b> [PEPPo] Proof-of-principle ,e,+, source for future colliders</font>
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<div class="PlainText"><a href="https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.27.013401">https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.27.013401</a><br>
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6 GeV electron beam and thick target. I send this only because of the <br>
fragment starting at the bottom of page one:<br>
<br>
as well as a novel standing wave solution for the rf cavities that <br>
provides a large iris aperture<br>
<br>
which may be of interest.<br>
<br>
The PSI Positron Production (P 3 or P-cubed) experiment is a e þ source <br>
and capture system with the<br>
potential to increase by an order of magnitude the state-of-the-art e þ <br>
yield normalized to the drive linac<br>
energy, a highly desirable goal for future colliders. The experiment is <br>
framed in the FCC-ee injector study<br>
and will be hosted at SwissFEL, located at the Paul Scherrer Institute <br>
in Switzerland. This paper presents<br>
the P 3 project at an advanced stage, with an emphasis on a capture <br>
system featuring a novel e þ matching<br>
device based on high-temperature superconducting solenoids, followed by <br>
two large aperture rf cavities<br>
surrounded by normal-conducting solenoids. The diagnostics design is <br>
also introduced, including monitors<br>
of charge, energy spectrum, and bunch-by-bunch longitudinal profile <br>
simultaneously for secondary e þ and<br>
e − . The last chapter of the text overviews the currently ongoing <br>
installation at SwissFEL, including the<br>
beam transfer line, rf network, radiation protection, and other relevant <br>
activities toward the operation with<br>
e þ in the coming years.<br>
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