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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Haipeng Wang <haipeng@jlab.org><br>
<b>Sent:</b> Tuesday, July 15, 2025 2:44 PM<br>
<b>To:</b> Rongli Geng <geng@jlab.org><br>
<b>Cc:</b> Shaoheng Wang <wang@jlab.org>; Valerie Bookwalter <bookwalt@jlab.org>; Megan McDonald <megan@jlab.org>; Gianluigi Ciovati <gciovati@jlab.org>; Uttar Pudasaini <uttar@jlab.org><br>
<b>Subject:</b> Re: SRF Cavities ' Parameters Table</font>
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Rongli, both VTA and CMTF or CEBAF using sqrt(R/Q)/L numbers. CEBAF also used r/Q=R/Q/L definition.</div>
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For the Eacc/sqrt(U) (MV/m/sqrt(J)). You only need G14=Sqrt(R/Q)/L=46.58 sqrt(Ohm)/m.</div>
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So Eacc/sqrt(U)=sqrt(R/Q*omega)/Lacc=46.58*sqrt(2*pi*1497*10^6)*10^-6=4.518MV/m/sqrt(J).</div>
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Haipeng</div>
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<b>From:</b> Rongli Geng <geng@jlab.org><br>
<b>Sent:</b> Tuesday, July 15, 2025 2:23 PM<br>
<b>To:</b> Haipeng Wang <haipeng@jlab.org><br>
<b>Cc:</b> Shaoheng Wang <wang@jlab.org>; Valerie Bookwalter <bookwalt@jlab.org>; Megan McDonald <megan@jlab.org>; Gianluigi Ciovati <gciovati@jlab.org>; Uttar Pudasaini <uttar@jlab.org><br>
<b>Subject:</b> Re: SRF Cavities ' Parameters Table </div>
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Thanks Haipeng for sharing. </div>
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I'm looking for a cavity parameter: Eacc/sqrt(U) (MV/m/sqrt(J)). It is not in your table. Is it possible to extract it from the model and data base for C75 cavity? </div>
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Thanks,</div>
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Rongli</div>
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<b>Rongli Geng</b></div>
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<b>Principal Staff Scientist</b></div>
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<b>SRF S&T Department Head</b></div>
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<b>O: (757)269-6790 | M: (757)282-1207</b></div>
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<b>geng@jlab.org</b></div>
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<b>From:</b> Haipeng Wang <haipeng@jlab.org><br>
<b>Sent:</b> Tuesday, July 15, 2025 1:51 PM<br>
<b>To:</b> Rongli Geng <geng@jlab.org><br>
<b>Cc:</b> Shaoheng Wang <wang@jlab.org>; Valerie Bookwalter <bookwalt@jlab.org>; Megan McDonald <megan@jlab.org><br>
<b>Subject:</b> SRF Cavities ' Parameters Table</div>
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Rongli,</div>
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I have tried to look at this table in JLab's Pansophy system without a success. Here attached is my Excel spreadsheet I had updated with Megan in last December. </div>
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Certainly, current CERN's QPR and ODU's TE0XX cavities tuning in the RF Structure Lab are not in my radar or in this table.</div>
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Thanks for asking</div>
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Haipeng</div>
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