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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Joe Wilson<br>
<b>Sent:</b> Tuesday, August 2, 2022 3:16 PM<br>
<b>To:</b> Shawn Frierson <frierson@jlab.org><br>
<b>Cc:</b> Sasa Radovic <radovic@jlab.org>; Ritendra Bhattacharya <ritendra@jlab.org><br>
<b>Subject:</b> CTLis 107240 ESR Cold box DP / Vacuum issue</font>
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Shawn, </p>
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On 3Aug22, we (Cryo) need to investigate a potential problem with the diffusion pump (DP) that maintains the insulating vacuum for ESR Cold Box. The risk is not zero to ESR operations. We have no choice but to investigate before further degradation in ESR DP
performance. </p>
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Thanks! </p>
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<span style="margin:0px; line-height:105%; font-family:"Times New Roman",serif; font-size:12pt">-----------------</span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin:0px"><b><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">Joe D. Wilson, Jr.</span></b></p>
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