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Hi Folks,</div>
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I mentioned today there was extensive study of warm RF cavities in high magnetic field for the US muon collider program. Attached is a nice summary paper. Fortunately (or unfortunately) we will not be operating CW in the gradient range they were concerned
about, so we are free to use higher magnetic field in the capture cavity section if it proves useful. Incidentally the nice thermal modeling of the beam-metal interaction which gives rise to the breakdown (magnetic field focuses dark current into the wall
causing damage) may be interesting for our target problem. For those new to the field there was also extensive study of high power targets for the muon collider and neutrino factory studies which can be found in the literature. They even demonstrated a free
mercury jet target with high power beam at CERN. Fun times...</div>
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Bob.</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 Andriy Ushakov via PEPPo <peppo@jlab.org><br>
<b>Sent:</b> Monday, June 24, 2024 12:27 PM<br>
<b>To:</b> peppo@jlab.org <peppo@jlab.org><br>
<b>Subject:</b> [PEPPo] PWG meeting, Wed. @ 9am in TED-2559 and Zoom</font>
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<p class="x_MsoNormal"><span style="font-size:12.0pt">Dear Colleagues,</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt">A quick reminder that there will be
<span style="color:red">no </span>Ce+BAF meeting on June 26 (Wed., 11am), but the PWG meeting will be this Wednesday at
<span style="color:red">9am </span>in <span style="color:red">TED-2559</span> and on Zoom.
</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"><b><span style="font-size:12.0pt">Agenda:</span></b><span style="font-size:12.0pt">
<a href="https://indico.jlab.org/event/867/">https://indico.jlab.org/event/867/</a></span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<ul type="disc" style="margin-top:0mm">
<li class="x_MsoListParagraph" style="margin-left:0mm"><span style="font-size:12.0pt">Tim Lengler (Helmholtz-Zentrum Hereon, Geesthacht, Germany) - Characterization of changes in the crystal structure for radiated positron source materials</span></li><li class="x_MsoListParagraph" style="margin-left:0mm"><span style="font-size:12.0pt">Jay Benesch (JLab) - Conceptual design of the capture magnet</span></li><li class="x_MsoListParagraph" style="margin-left:0mm"><span style="font-size:12.0pt">Shaoheng Wang (JLab) - Initial studies of capture cavities for the CW polarized positron source Ce<sup>+</sup>BAF</span></li><li class="x_MsoListParagraph" style="margin-left:0mm"><span style="font-size:12.0pt">August Friebolin (George Washington University) - Preliminary calculations for a two photon exchange experiment with electrons in Hall B at JLab</span></li></ul>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt">The Zoom link: <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1607642988-3Fpwd-3DK2VMVlkwLzFwR0l0VjNWMFUvSGtrUT09&d=DwMDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=RpConCZ-Tf4pxYqJovepoRTuidBKG0zltOMcGC9lg2A&m=zl0nxuiGaRp2BEcdHr5n-Ywr38_jiybMn38tJ_sjhMyHOf2MruRsHbZkds1VQ0sZ&s=ZTNZm1d0LpqvJHqYAFxkoenN48_OQcF20V9d0Q6nTP4&e=">
https://jlab-org.zoomgov.com/j/1607642988?pwd=K2VMVlkwLzFwR0l0VjNWMFUvSGtrUT09</a></span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt">Best regards,</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt">Andriy</span></p>
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