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The B test is 20 min.</div>
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All beams maybe an hour.</div>
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I could make a table, Ops can perform, note "good" or "bad" or record halo #'s.</div>
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Joe<br>
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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> Friday, August 28, 2020 7:56 AM<br>
<b>To:</b> bteam@jlab.org <bteam@jlab.org><br>
<b>Subject:</b> [BTeam] more possible checks</font>
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Assuming the problem is not localized within Hall B, we can also check the bleedthru from other halls. </div>
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suggestion from Joe Grames:</div>
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<span style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">If you close all slits and only run the Hall B beam at 250 MHz is the "cleanest" setup, to the extent B is not bleeding into B' and scraping
into the Hall - I guess it should really be close to zero and the base line. Next, open up only the A slit, to check for B into A, and then open up only the C slit, to check for B through C slit. If no halo yet, then B laser is excluded from causing themselves
grief. After this, you could repeat with only each of the other beams, to identify the source of the electrons causing halo.</span><br>
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<span style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">He estimates this is a 20 minute thing and he is willing to assist the crew do this in case they need to.</span></div>
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