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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> BTeam <bteam-bounces@jlab.org> on behalf of Yves Roblin <roblin@jlab.org><br>
<b>Sent:</b> Tuesday, March 17, 2020 14:50<br>
<b>To:</b> bteam@jlab.org <bteam@jlab.org><br>
<b>Subject:</b> [BTeam] summary of 3/17/2020 bteam</font>
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<div dir="ltr">[Concerning the 4D dump region back-phasing bunchlength measurements, the following was said:] There is also the issue of calibration of the 4D00 harp versus the viewer. Using one or the other during backphasing results in a significant difference
for the bunch length.
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During the BTeam discussion, I misunderstood this reference as 1A21 SLM vs 1A21 harp (a no-longer-present device), and commented about differing dispersion at the two diagnostics. This was completely my misunderstanding, and I now recognize the discussion
point was the 4D region viewer vs. harp profiles. I apologize for any confusion I may have introduced into the discussion at the time.</div>
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<div dir="ltr">Michael Tiefenback<br>
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