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Hi Jay,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
it's a very nice project. I'm just looking at it from the point of view of capture. It looks like they can reach 18 MV/m at 100 Hz repetition rate with 3 us pulse length. These are very good I think for this type of source. Is this a suitable flux and time
structure for CEBAF? If our users want a CW beam RF capture will be an issue.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Happy labor day!</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Bob.</div>
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<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Jay Benesch <benesch@jlab.org><br>
<b>Sent:</b> Sunday, September 3, 2023 5:05 PM<br>
<b>To:</b> Robert Rimmer <rarimmer@jlab.org>; peppo@jlab.org <peppo@jlab.org>; Larry Cardman <cardman@jlab.org><br>
<b>Cc:</b> Katheryne Price <kprice@jlab.org><br>
<b>Subject:</b> Re: The P3 Experiment: A Positron Source Demonstrator for Future Lepton Colliders</font>
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<div class="PlainText">Bob,<br>
<br>
Think. 1497 MHz electron source. Spinning tungsten or liquid metal <br>
target surrounded by HTSC solenoid for capture. Cooled copper 1497 MHz <br>
cavities surrounded by 77K copper or aluminum solenoids at more than <br>
0.5T. The paper's optics downstream is also worth looking at.<br>
<br>
Jay<br>
<br>
On 9/3/23 16:49, Robert Rimmer wrote:<br>
> this seems to be a pulsed source, I though CEBAF was looking for CW, <br>
> which is more challenging.<br>
> Bob.<br>
> <br>
> ------------------------------------------------------------------------<br>
> *From:* PEPPo <peppo-bounces@jlab.org> on behalf of Larry Cardman via <br>
> PEPPo <peppo@jlab.org><br>
> *Sent:* Sunday, September 3, 2023 2:47 PM<br>
> *To:* peppo@jlab.org <peppo@jlab.org>; Jay Benesch <benesch@jlab.org><br>
> *Cc:* Katheryne Price <kprice@jlab.org><br>
> *Subject:* Re: [PEPPo] The P3 Experiment: A Positron Source Demonstrator <br>
> for Future Lepton Colliders<br>
> Looks like something that would be worth looking into in detail as a <br>
> potential upgrade for the source. A very relevant question would be the <br>
> enhancement possible for already approved experiments with the increased <br>
> luminosity.<br>
> Larry<br>
> ------------------------------------------------------------------------<br>
> *From:* PEPPo <peppo-bounces@jlab.org> on behalf of Jay Benesch via <br>
> PEPPo <peppo@jlab.org><br>
> *Sent:* Friday, September 1, 2023 2:17 PM<br>
> *To:* peppo@jlab.org <peppo@jlab.org><br>
> *Cc:* Katheryne Price <kprice@jlab.org><br>
> *Subject:* [PEPPo] The P3 Experiment: A Positron Source Demonstrator for <br>
> Future Lepton Colliders<br>
> <a href="https://arxiv.org/abs/2308.16803">https://arxiv.org/abs/2308.16803</a> <<a href="https://arxiv.org/abs/2308.16803">https://arxiv.org/abs/2308.16803</a>><br>
> <br>
> The PSI Positron Production (P3 or P-cubed) experiment is a demonstrator <br>
> for a e+ source and capture system with potential to improve the <br>
> state-of-the-art e+ yield by an order of magnitude. The experiment is <br>
> driven by the FCC-ee injector study and will be hosted in the SwissFEL <br>
> facility at the Paul Scherrer Institute in Switzerland. This paper is an <br>
> overview of the P3 design at an advanced stage, with a particular <br>
> emphasis on a novel e+ capture system and its associated beam dynamics. <br>
> Additionally, a concept for the experiment diagnostics is presented, as <br>
> well as the key points of the ongoing installation works.<br>
> <br>
> The remarkable<br>
> e+ capture capabilities of P3 are enabled to great extent by the usage <br>
> of high temperature superconducting<br>
> (HTS) solenoid around the target region, as well as a<br>
> novel standing wave solution for the RF cavities that<br>
> provides a large iris aperture to maximize e+ capture<br>
> (see Table II). In addition, a variety of beam diagnostics,<br>
> whose goal is to demonstrate such a e+ yield upgrade,<br>
> will detect simultaneously the captured e+e- time structure, and <br>
> measure the bunch charge and energy spectrum<br>
> of e+ and e- streams separately<br>
> _______________________________________________<br>
> PEPPo mailing list<br>
> PEPPo@jlab.org<br>
> <a href="https://mailman.jlab.org/mailman/listinfo/peppo">https://mailman.jlab.org/mailman/listinfo/peppo</a>
<br>
> <<a href="https://mailman.jlab.org/mailman/listinfo/peppo">https://mailman.jlab.org/mailman/listinfo/peppo</a>><br>
<br>
<br>
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