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<p class="MsoNormal"><span style="font-size:11.0pt">FRIB targets are rotating carbon disks. The final design goal is 200 MeV U beam of 400 kW beam power. I think the first stage was for 50 kW.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Thank you, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Eduard.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">PEPPo <peppo-bounces@jlab.org> on behalf of Bill Briscoe via PEPPo <peppo@jlab.org><br>
<b>Date: </b>Saturday, March 2, 2024 at 9:27</span><span style="font-family:"Arial",sans-serif;color:black"> </span><span style="color:black">AM<br>
<b>To: </b>Eugene Pasyuk <pasyuk@jlab.org><br>
<b>Cc: </b>pwg@jlab.org <pwg@jlab.org>, peppo@jlab.org <peppo@jlab.org><br>
<b>Subject: </b>[PEPPo] [EXTERNAL] Re: [PWG] Towards a high-intensity muon source<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hi Jay<br>
<br>
There are many publications and presentations available online that<br>
discuss the rotating graphite wheels. These are mostly from the period<br>
when the large Meson Factories (LAMPF, TRIUMF, SIN) were being planned<br>
and built in the 60's - 70's.<br>
<br>
BB<br>
<br>
William J. Briscoe, Professor Emeritus<br>
Department of Physics<br>
The George Washington University<br>
Director Emeritus, GW Institute for Nuclear Studies (GWINS)<br>
Director, Data Analysis Center (DAC)<br>
202-994-6788 (Foggy Bottom Campus)<br>
571-553-8340 (Virginia Science and Technology Campus)<br>
<br>
On Fri, Mar 1, 2024 at 9:24</span><span style="font-size:11.0pt;font-family:"Arial",sans-serif"> </span><span style="font-size:11.0pt">AM Eugene Pasyuk via PWG <pwg@jlab.org> wrote:<br>
><br>
> The rotating graphite targets (wheels) were used for years at LAMPF with 1 mA of 800 MeV proton beam.<br>
><br>
> -Eugene<br>
><br>
> -<br>
> > -----Original Message-----<br>
> > From: PWG <pwg-bounces@jlab.org> On Behalf Of Jay Benesch via PWG<br>
> > Sent: Friday, March 01, 2024 09:18<br>
> > To: peppo@jlab.org; pwg@jlab.org<br>
> > Subject: [PWG] Towards a high-intensity muon source<br>
> ><br>
> > The target discussion and capture scheme should be of interest. The capture<br>
> > solenoid the authors arrived at is almost identical to the one we're using:<br>
> > reassuring. The bearing wear issue on rotating graphite target is not one I<br>
> > had seen discussed prior to this. Pavel's non-rotating target solves that so he<br>
> > may be aware of the issue.<br>
> ><br>
> ><br>
> > <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.aps.org_prab_abstract_10.1103_PhysRevAccelBeams.27.0234&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=JlUFXKjU497y48k9NKRpBw&m=utBQd6-k21Fwg_58zmYQnopBRIgi_6KqbC1a2uJLUf5-pWdZ5mJjbA50qZ7S5JaR&s=bC0hbHvG68GYMvWK5euxz9j5F_r0129HFhor0tjP_k8&e=">
https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.aps.org_prab_abstract_10.1103_PhysRevAccelBeams.27.0234&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=JlUFXKjU497y48k9NKRpBw&m=utBQd6-k21Fwg_58zmYQnopBRIgi_6KqbC1a2uJLUf5-pWdZ5mJjbA50qZ7S5JaR&s=bC0hbHvG68GYMvWK5euxz9j5F_r0129HFhor0tjP_k8&e=</a>
<br>
> > 03<br>
> ><br>
> > Han-Jie Cai, Yuan He, Shuhui Liu, Huan Jia, Yuanshuai Qin, Zhijun Wang,<br>
> > Fengfeng Wang, Lixia Zhao, Neng Pu, Jianwei Niu, Liangwen Chen, Zhiyu Sun,<br>
> > Hongwei Zhao, and Wenlong Zhan Phys. Rev. Accel. Beams 27, 023403 –<br>
> > Published 27 February 2024<br>
> ><br>
> > A high-intensity muon source driven by a continuous-wave superconducting<br>
> > linac holds the potential to significantly advance the intensity frontier of<br>
> > muon sources. Alongside advancements in accelerator technologies,<br>
> > breakthroughs in muon production target and collection schemes are<br>
> > essential. After a brief introduction to the development of the accelerator-<br>
> > driven system superconducting linac, a novel muon production target is<br>
> > proposed, utilizing a free-surface liquid lithium jet capable of handling the<br>
> > heat power generated by a proton beam with an energy of 600 MeV and a<br>
> > current of 5 mA. It is predicted by our simulation studies that the lithium<br>
> > target is more efficient in surface muon production compared to the rotating<br>
> > graphite target. The parameter space of the front end consisting of a lithium<br>
> > target and a large-aperture capture solenoid is explored, from the<br>
> > perspective of production efficiency, capture efficiency, and characteristics<br>
> > of the surface muon beam.<br>
> ><br>
> > _______________________________________________<br>
> > PWG mailing list<br>
> > PWG@jlab.org<br>
> > <a href="https://mailman.jlab.org/mailman/listinfo/pwg">https://mailman.jlab.org/mailman/listinfo/pwg</a><br>
><br>
> _______________________________________________<br>
> PWG mailing list<br>
> PWG@jlab.org<br>
> <a href="https://mailman.jlab.org/mailman/listinfo/pwg">https://mailman.jlab.org/mailman/listinfo/pwg</a><br>
<br>
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