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Hall C is reporting 1/4 - 1/3 of their detector rates coming from bleedthru for A-beam. More to come.... </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> BTeam <bteam-bounces@jlab.org> on behalf of Yan Wang <ywang@jlab.org><br>
<b>Sent:</b> Tuesday, September 8, 2020 3:48 PM<br>
<b>To:</b> Jay Benesch <benesch@jlab.org>; BTeam <bteam@jlab.org><br>
<b>Subject:</b> Re: [BTeam] injector energy change this morning affected BCD</font>
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Jay,</div>
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After recovering 0L04 I restored the 0L04 gsets using the allsave done during the owl shift and the injector energy was 120.87 MeV. Assuming this is the correct energy I did not changed it.
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I can go there now and take care of it. I need about 30 minutes.</div>
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Yan<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> BTeam <bteam-bounces@jlab.org> on behalf of Jay Benesch <benesch@jlab.org><br>
<b>Sent:</b> Tuesday, September 8, 2020 3:22 PM<br>
<b>To:</b> BTeam <bteam@jlab.org><br>
<b>Subject:</b> [BTeam] injector energy change this morning affected BCD</font>
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<div class="x_PlainText">Colleagues,<br>
<br>
<a href="https://logbooks.jlab.org/entry/3843753">https://logbooks.jlab.org/entry/3843753</a> Yan phased 0L04 cavities in 0L06
<br>
spectrometer<br>
<a href="https://logbooks.jlab.org/entry/3843858">https://logbooks.jlab.org/entry/3843858</a> 7 degree phase change needed for
<br>
A Compton counts<br>
<br>
after phone calls from Brad:<br>
<a href="https://logbooks.jlab.org/entry/3843974">https://logbooks.jlab.org/entry/3843974</a> Terry<br>
<a href="https://logbooks.jlab.org/entry/3843977">https://logbooks.jlab.org/entry/3843977</a> me<br>
<a href="https://logbooks.jlab.org/entry/3843984">https://logbooks.jlab.org/entry/3843984</a> me<br>
<br>
Examining the archiver, I found that INJ:p changed by 0.87 MeV across <br>
the injector work necessitated by the 0L04-4 problem. This caused the <br>
ARC1 energy lock to lower the NL by the same amount. Hall A energy <br>
locked by SL so it's fine. Halls B and C lose 4*0.87 MeV and Hall D <br>
loses 5*0.87 MeV. This is not good for polarization in either B or C. <br>
spinDoctor is broken on both RHEL 6 and 7 (see below) so I can't say how <br>
bad it is. Dave Gaskell created a graph which wmhenry posted in the <br>
CLOG a week or so ago that showed about 1% drop per MeV.<br>
<br>
It would seem that the only way to fix this is to go back into the <br>
injector and adjust BL dipoles and horizontal correctors to reduce the <br>
injector energy to where it was on owl shift. Not something I want to <br>
do late swing shift. I expect I'll hear from run coordinators about my <br>
elog and their druthers.<br>
<br>
Jay<br>
<br>
<br>
spinDoctor errors on RHEL6, RHEL7 roughly the same:<br>
<br>
ACC RHEL i686 6.10 (rhel-6-ia32)<br>
[51] benesch@opsl12 > spinDoctor&<br>
[1] 10065<br>
[52] benesch@opsl12 > Can't load <br>
'/a/certified/apps/swig/cedlib/6.4/perl/5.10.1/lib/rhel-7-x86_64/cedlib.so' <br>
for module cedlib: <br>
/a/certified/apps/swig/cedlib/6.4/perl/5.10.1/lib/rhel-7-x86_64/cedlib.so: <br>
wrong ELF class: ELFCLASS64 at <br>
/usr/csite/pubtools/perl/5.10.1/lib/5.10.1/i686-linux-thread-multi/DynaLoader.pm <br>
line 200.<br>
at <br>
/a/certified/apps/swig/cedlib/6.4/perl/5.10.1/lib/rhel-7-x86_64/cedlib.pm <br>
line 11.<br>
Compilation failed in require at /cs/prohome/bin/spinDoctor line 25.<br>
BEGIN failed--compilation aborted at /cs/prohome/bin/spinDoctor line 25.<br>
<br>
[1] Exit 2 spinDoctor<br>
[<br>
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