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Hi Nathan,</div>
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I looked back at my notes. You should be able to spot the error directly in Run16767. When you look at the RAW::scaler bank printout for recon file 16, the channel id for the 33ms interval is 0 1 2 (32 33 34 for the 500us interval). This is perhaps easiest
to spot by the clockgated value in channel id 2. For recon file 167, you can look through RAW::scaler and see that the channel ids dedicated for the 33ms interval have swapped with the 500us.</div>
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I've attached two screenshots to better illustrate this.</div>
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Let me know if you need any more clarification!</div>
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Best,</div>
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Gregory</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nathan Baltzell <baltzell@jlab.org><br>
<b>Sent:</b> Saturday, September 24, 2022 1:34 PM<br>
<b>To:</b> Gregory Matousek <gregory.matousek@duke.edu><br>
<b>Cc:</b> Maurik Holtrop <holtrop@jlab.org>; Sebastian Kuhn <kuhn@jlab.org>; pilleux@jlab.org <pilleux@jlab.org>; Mohammad Hattawy <hattawy@jlab.org>; Anselm Vossen, Ph.D. <anselm.vossen@duke.edu>; Silvia Niccolai <silvia@jlab.org>; Florian Hauenstein <hauenst@jlab.org>;
Harut Avagyan <avakian@jlab.org>; Daria Sokhan <daria@jlab.org>; rgc_analysis@jlab.org <rgc_analysis@jlab.org>; Raffaella De Vita <devita@jlab.org>; Sergey Boyarinov <boiarino@jlab.org><br>
<b>Subject:</b> Re: [Rgc_analysis] [EXTERNAL] Re: RGC Beam Charge Asymmetry & Scaler Bank QA</font>
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<div class="" style="word-wrap:break-word; line-break:after-white-space">Hi Gregory,
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<div class="" style="color:rgb(0,0,0)">Thanks for looking into this!</div>
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</div>
<div class="" style="color:rgb(0,0,0)">I think we know now that it's not a bug in RAW::scaler, but in how its contents is being interpreted and results in HEL::scaler. Some assumptions were made in previous years, that were probably/maybe correct at that time,
but things have evolved ...</div>
</div>
<div class="" style="color:rgb(0,0,0)"><br class="">
</div>
<div class="" style="color:rgb(0,0,0)">
<div class="">Others have been looking into this too, and there's a pull request in that should address it (along with various other scaler readout quirks): <a href="https://urldefense.com/v3/__https://github.com/JeffersonLab/clas12-offline-software/pull/949__;!!OToaGQ!qLhvH1d_REhtCb14GC4S6IegpgA7vl5U560R6DpyEYIbxFQemZ0SA40Mwg0u8OX8mh0Kr9CEmEks7J5K4gBpbS47$" class="">https://github.com/JeffersonLab/clas12-offline-software/pull/949</a></div>
</div>
<div class=""><br class="">
</div>
<div class=""><span class="" style="color:rgb(0,0,0)">Can you point me to a particular run/file where you see a large effect from your particular issue? I've tested on a few but would like to test on that one too.</span><br class="" style="color:rgb(0,0,0)">
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<div class="">
<div>-Nathan</div>
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<div><br class="">
<blockquote type="cite" class="">
<div class="">On Sep 18, 2022, at 6:52 PM, Gregory Matousek <<a href="mailto:gregory.matousek@duke.edu" class="">gregory.matousek@duke.edu</a>> wrote:</div>
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Hi Maurik,</div>
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This is great to hear. I looked deeper into the FCup issue today and stumbled across this RAW::scaler bug you are mentioning. It seems that, arbitrarily, the channel id's for the 33ms window and 500microsecond window get swapped mid-run, leading to a ~70x drop
in FCup reported per scaler bank entry. I corrected for this in my attached slideshow, and I intend to talk about it more in depth on tuesday.</div>
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<a href="https://urldefense.com/v3/__https://cc.jlab.org/system/files/users/gmat@jlab.org/Presentations/Bug*20Fixes*20in*20RAW__Scaler*20Bank.pdf__;JSUlJQ!!OToaGQ!qLhvH1d_REhtCb14GC4S6IegpgA7vl5U560R6DpyEYIbxFQemZ0SA40Mwg0u8OX8mh0Kr9CEmEks7J5K4pcdfq-B$" id="LPlnk373231" class="">https://cc.jlab.org/system/files/users/gmat%40jlab.org/Presentations/Bug%20Fixes%20in%20RAW__Scaler%20Bank.pdf</a><br class="">
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Best,</div>
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Gregory<br class="">
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<font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">From:</b><span class="x_Apple-converted-space"> </span>Maurik Holtrop <<a href="mailto:holtrop@jlab.org" class="">holtrop@jlab.org</a>><br class="">
<b class="">Sent:</b><span class="x_Apple-converted-space"> </span>Sunday, September 18, 2022 6:31 PM<br class="">
<b class="">To:</b><span class="x_Apple-converted-space"> </span>Gregory Matousek <<a href="mailto:gregory.matousek@duke.edu" class="">gregory.matousek@duke.edu</a>><br class="">
<b class="">Cc:</b><span class="x_Apple-converted-space"> </span>Sebastian Kuhn <<a href="mailto:kuhn@jlab.org" class="">kuhn@jlab.org</a>>;<span class="x_Apple-converted-space"> </span><a href="mailto:pilleux@jlab.org" class="">pilleux@jlab.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:pilleux@jlab.org" class="">pilleux@jlab.org</a>>;
Mohammad Hattawy <<a href="mailto:hattawy@jlab.org" class="">hattawy@jlab.org</a>>; Anselm Vossen, Ph.D. <<a href="mailto:anselm.vossen@duke.edu" class="">anselm.vossen@duke.edu</a>>; Silvia Niccolai <<a href="mailto:silvia@jlab.org" class="">silvia@jlab.org</a>>;
Florian Hauenstein <<a href="mailto:hauenst@jlab.org" class="">hauenst@jlab.org</a>>; Harout Avakian <<a href="mailto:avakian@jlab.org" class="">avakian@jlab.org</a>>; Daria Sokhan <<a href="mailto:daria@jlab.org" class="">daria@jlab.org</a>>;<span class="x_Apple-converted-space"> </span><a href="mailto:rgc_analysis@jlab.org" class="">rgc_analysis@jlab.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:rgc_analysis@jlab.org" class="">rgc_analysis@jlab.org</a>>;
Nathan Baltzell <<a href="mailto:baltzell@jlab.org" class="">baltzell@jlab.org</a>>; Raffaella De Vita <<a href="mailto:devita@jlab.org" class="">devita@jlab.org</a>>; Serguei Boiarinov <<a href="mailto:boiarino@jlab.org" class="">boiarino@jlab.org</a>><br class="">
<b class="">Subject:</b><span class="x_Apple-converted-space"> </span>Re: [Rgc_analysis] [EXTERNAL] Re: RGC Beam Charge Asymmetry & Scaler Bank QA</font>
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Hello Gregory, Noémie, Sebastian,
<div class=""><br class="">
</div>
<div class="">I am sorry I could not make the 2:15 meeting today.</div>
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</div>
<div class="">I have been going back and forth a bit with Nathan about the HEL::scaler bank. The problem seems to be in the decoding of the EVIO bank to the HEL::scaler bank and the issue where the bit that should indicate the difference between the stable
and the settle period is not reliable. Nathan pointed out that you can look at the RAW::scaler bank, which contains both the stable and settle information, so you can untangle where the “bit flip” happens and pick the correct one, but this will be a bit more
coding than just looking at the HEL::scaler bank. </div>
<div class=""><br class="">
</div>
<div class="">It is too early to come to a conclusion, but from some cursory looks at the data it appears that we will be able to write some code in the JAVA tools that will correct for this problem. Nathan is already working on some of the required changes
to the code.</div>
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</div>
<div class="">Best,</div>
<div class="">Maurik</div>
<div class=""><br class="">
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On Sep 14, 2022, at 1:22 PM, Gregory Matousek <<a href="mailto:gregory.matousek@duke.edu" class="">gregory.matousek@duke.edu</a>> wrote:</div>
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Yes, I will be there. I'm putting together an abridged talk which has some interesting conclusions. Hopefully I'll be able to explain things coherently enough.</div>
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See you at 2:15pm</div>
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<font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">From:</b><span class="x_x_Apple-converted-space"> </span>Sebastian Kuhn <<a href="mailto:kuhn@jlab.org" class="">kuhn@jlab.org</a>><br class="">
<b class="">Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, September 14, 2022 11:41 AM<br class="">
<b class="">To:</b><span class="x_x_Apple-converted-space"> </span><a href="mailto:pilleux@jlab.org" class="">pilleux@jlab.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:pilleux@jlab.org" class="">pilleux@jlab.org</a>><br class="">
<b class="">Cc:</b><span class="x_x_Apple-converted-space"> </span>Gregory Matousek <<a href="mailto:gregory.matousek@duke.edu" class="">gregory.matousek@duke.edu</a>>; Anselm Vossen, Ph.D. <<a href="mailto:anselm.vossen@duke.edu" class="">anselm.vossen@duke.edu</a>>;<span class="x_Apple-converted-space"> </span><a href="mailto:rgc_analysis@jlab.org" class="">rgc_analysis@jlab.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:rgc_analysis@jlab.org" class="">rgc_analysis@jlab.org</a>>;
Harut Avagyan <<a href="mailto:avakian@jlab.org" class="">avakian@jlab.org</a>>; Mohammad Hattawy <<a href="mailto:hattawy@jlab.org" class="">hattawy@jlab.org</a>>; Silvia Niccolai <<a href="mailto:silvia@jlab.org" class="">silvia@jlab.org</a>>; Raffaella
De Vita <<a href="mailto:devita@jlab.org" class="">devita@jlab.org</a>>; Daria Sokhan <<a href="mailto:daria@jlab.org" class="">daria@jlab.org</a>>; Florian Hauenstein <<a href="mailto:hauenst@jlab.org" class="">hauenst@jlab.org</a>>; Nathan Baltzell <<a href="mailto:baltzell@jlab.org" class="">baltzell@jlab.org</a>>;
Sergey Boyarinov <<a href="mailto:boiarino@jlab.org" class="">boiarino@jlab.org</a>><br class="">
<b class="">Subject:</b><span class="x_x_Apple-converted-space"> </span>Re: [Rgc_analysis] [EXTERNAL] Re: RGC Beam Charge Asymmetry & Scaler Bank QA</font>
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Dear Gregory, Carlos and Noemie,
<div class=""><br class="">
</div>
<div class="">these are very interesting findings - and I can’t say I understand exactly what you are showing and what it could mean. I tend to think that it would be important enough to discuss this today during the daily RC meeting (unfortunately starting
at 2:15 p.m.), since we may actually have the opportunity to think of some kind of tests in the Hall (beam is not expected back until later this evening). If it turns out that we cannot normalize our data to helicity- and lifetime-gated FC counts, we need
to act rather urgently, so I would prefer not to wait until next Tuesday’s RG-C analysis meeting. Let me know what you think and if you can attend.</div>
<div class=""><br class="">
</div>
<div class="">- Sebastian</div>
<div class="">
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On Sep 14, 2022, at 6:04 AM,<span class="x_x_Apple-converted-space"> </span><a href="mailto:pilleux@jlab.org" class="">pilleux@jlab.org</a><span class="x_x_Apple-converted-space"> </span>wrote:</div>
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<div class=""><span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">Hello
Greg,</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">I
have been wondering about the issues you show, and I asked Raffaella and</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">Nathan
about it, I don't know if they had time to look into it yet.</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">As
you show, for many runs there are weird HEL::scaler readings in a</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">number
of files. For these files, the clock information gives crazy</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">numbers,
and the accumulated charge is almost 0. Please find attached a</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">plot
for run 16889 where I plot the time between two consecutive readings</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">(that
I compute from the accumulated charge using the beam current). It is</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">supposed
to be close to 33ms. As you show in slide 10, the first 86 files</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">look
fine but the last 214 don't.</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">A
problem I have with that is that the number of readings which are fine</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">change
run by run, and it makes the normalization of yields, to compute</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">DSA
for example, difficult. For now, all the normalizations of my dvcs</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">asymetries
look crazy (even when I try to include the proportion of 'good'</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">readings
in my scaling).</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">Best
regards, Noémie.</span><br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<br class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
<blockquote type="cite" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:400; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
One more word,<br class="">
<br class="">
The analysis can be expanded upon by not just looking at file-by-file<br class="">
scaler bank observables (for example, what was the fcup accumulation for<br class="">
file 'n') , but entry-by-entry observables. In that case, we could ask<br class="">
"how does the fcup accumulation evolve within the recon file itself?".<br class="">
Perhaps this could help us isolate more outliers or anomalies in the data.<br class="">
If any one has an idea of what we could investigate, feel free to let me<br class="">
know.<br class="">
<br class="">
Gregory<br class="">
________________________________<br class="">
From: Gregory Matousek <<a href="mailto:gregory.matousek@duke.edu" class="">gregory.matousek@duke.edu</a>><br class="">
Sent: Tuesday, September 13, 2022 6:31 PM<br class="">
To:<span class="x_x_x_Apple-converted-space"> </span><a href="mailto:rgc_analysis@jlab.org" class="">rgc_analysis@jlab.org</a><span class="x_x_x_Apple-converted-space"> </span><<a href="mailto:rgc_analysis@jlab.org" class="">rgc_analysis@jlab.org</a>><br class="">
Cc: Anselm Vossen, Ph.D. <<a href="mailto:anselm.vossen@duke.edu" class="">anselm.vossen@duke.edu</a>><br class="">
Subject: [Rgc_analysis] [EXTERNAL] RGC Beam Charge Asymmetry & Scaler Bank<br class="">
QA<br class="">
<br class="">
Hello all,<br class="">
<br class="">
<blockquote type="cite" class="">From today's RGC meeting, we were talking about putting in more effort<br class="">
into understanding the beam charge asymmetries from the faraday cup<br class="">
charge accumulation. I put together a presentation here which shows some<br class="">
work on just that<br class="">
(<a href="https://urldefense.com/v3/__https://cc.jlab.org/system/files/users/gmat*40jlab.org/Presentations/Scaler*20Bank*20QA*20for*20Target*20Polarization*20*40*20RGC.pdf*3Chttps:/*urldefense.com/v3/__https:/*cc.jlab.org/system/files/users/gmat*40jlab.org/Presentations/Scaler*20Bank*20QA*20for*20Target*20Polarization*20*40*20RGC.pdf__;JSUlJSUlJSUl!!OToaGQ!poBSft7q1QE-VjblFkLfXh9HGcjN1frfU9VC6AYrvF5WWO1CO_fCjHLu0CxfWhleR5s-DA8btLudX_LpgJ-8PlunFRdZ-sWwLy3v$*3E__;JSUlJSUlJSUlJS8vKioqKioqKioqJQ!!OToaGQ!sL5RlMuLSrOHoZllSwaEIA3vCLC9hoNM93etcS4QfXD-fOT5Qr2MF3PpQbcOpUrlw8CXucpgF1HrKYw-x2I$" class="">https://cc.jlab.org/system/files/users/gmat%40jlab.org/Presentations/Scaler%20Bank%20QA%20for%20Target%20Polarization%20%40%20RGC.pdf<https://urldefense.com/v3/__https://cc.jlab.org/system/files/users/gmat*40jlab.org/Presentations/Scaler*20Bank*20QA*20for*20Target*20Polarization*20*40*20RGC.pdf__;JSUlJSUlJSUl!!OToaGQ!poBSft7q1QE-VjblFkLfXh9HGcjN1frfU9VC6AYrvF5WWO1CO_fCjHLu0CxfWhleR5s-DA8btLudX_LpgJ-8PlunFRdZ-sWwLy3v$></a>)<br class="">
</blockquote>
<br class="">
In this presentation, I look into the HEL::scaler and RUN::scaler banks<br class="">
for Run 16889 and Run 16918 , the former having an apparent 0.6% BCA and<br class="">
the latter -0.02% BCA (slide 16 reports +0.02% but this is because FC+ is<br class="">
defined by beam/target spins parallel, where in fact it should just be<br class="">
helicity = +1, accounting for just HWP status). We can see anomalies in<br class="">
the scaler banks for both runs, which needs discussing.<br class="">
<br class="">
Please feel free to ask any questions!<br class="">
<br class="">
Gregory<br class="">
_______________________________________________<br class="">
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