[PEPPo] The P3 Experiment: A Positron Source Demonstrator for Future Lepton Colliders

[Jay Benesch]

Bob,

Think.  1497 MHz electron source.  Spinning tungsten or liquid metal 
target surrounded by HTSC solenoid for capture.  Cooled copper 1497 MHz 
cavities surrounded by 77K copper or aluminum solenoids at more than 
0.5T.  The paper's optics downstream is also worth looking at.

Jay

On 9/3/23 16:49, Robert Rimmer wrote:
> this seems to be a pulsed source, I though CEBAF was looking for CW, 
> which is more challenging.
> Bob.
> 
> ------------------------------------------------------------------------
> *From:* PEPPo <peppo-bounces at jlab.org> on behalf of Larry Cardman via 
> PEPPo <peppo at jlab.org>
> *Sent:* Sunday, September 3, 2023 2:47 PM
> *To:* peppo at jlab.org <peppo at jlab.org>; Jay Benesch <benesch at jlab.org>
> *Cc:* Katheryne Price <kprice at jlab.org>
> *Subject:* Re: [PEPPo] The P3 Experiment: A Positron Source Demonstrator 
> for Future Lepton Colliders
> Looks like something that would be worth looking into in detail as a 
> potential upgrade for the source.  A very relevant question would be the 
> enhancement possible for already approved experiments with the increased 
> luminosity.
>                                          Larry
> ------------------------------------------------------------------------
> *From:* PEPPo <peppo-bounces at jlab.org> on behalf of Jay Benesch via 
> PEPPo <peppo at jlab.org>
> *Sent:* Friday, September 1, 2023 2:17 PM
> *To:* peppo at jlab.org <peppo at jlab.org>
> *Cc:* Katheryne Price <kprice at jlab.org>
> *Subject:* [PEPPo] The P3 Experiment: A Positron Source Demonstrator for 
> Future Lepton Colliders
> https://arxiv.org/abs/2308.16803 <https://arxiv.org/abs/2308.16803>
> 
> The PSI Positron Production (P3 or P-cubed) experiment is a demonstrator 
> for a e+ source and capture system with potential to improve the 
> state-of-the-art e+ yield by an order of magnitude. The experiment is 
> driven by the FCC-ee injector study and will be hosted in the SwissFEL 
> facility at the Paul Scherrer Institute in Switzerland. This paper is an 
> overview of the P3 design at an advanced stage, with a particular 
> emphasis on a novel e+ capture system and its associated beam dynamics. 
> Additionally, a concept for the experiment diagnostics is presented, as 
> well as the key points of the ongoing installation works.
> 
> The remarkable
> e+ capture capabilities of P3 are enabled to great extent by the usage 
> of high temperature superconducting
> (HTS) solenoid around the target region, as well as a
> novel standing wave solution for the RF cavities that
> provides a large iris aperture to maximize e+ capture
> (see Table II). In addition, a variety of beam diagnostics,
> whose goal is to demonstrate such a e+ yield upgrade,
> will detect simultaneously the captured e+e- time structure, and 
> measure the bunch charge and energy spectrum
> of e+ and e- streams separately
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