<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Dear Timothy and Latifa,</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Although the run list you cooked here does not include the following run range, I wanted to remind everyone that Pass 1 runs 5249-5340 were cooked with the wrong attenuation factor; my notes say "10.61360 instead of 9.8088. Beam charge overestimated by about
8%."</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
If I recall correctly, this was corrected for in Pass 2; could you double check?</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
It looks like it was corrected in CCDB in May 2022, but it would still be good to double check the cooked data:
<a href="https://clasweb.jlab.org/cgi-bin/ccdb/show_request?request=%2Fruncontrol%2Ffcup%3A5249%3Adefault">
https://clasweb.jlab.org/cgi-bin/ccdb/show_request?request=%2Fruncontrol%2Ffcup%3A5249%3Adefault</a></div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Perhaps this is just a red herring, but I wanted to at least mention this issue in case it has any relevance for this charge discrepancy.</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Cheers,</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Chris</div>
<div class="elementToProof" id="Signature" style="color: inherit;">
<blockquote style="margin-left: 0.8ex; padding-left: 1ex; border-left: 3px solid rgb(200, 200, 200);">
<p style="margin-top: 0px; margin-bottom: 0px; font-family: Aptos;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">Christopher Dilks</span></p>
<p style="margin-top: 0px; margin-bottom: 0px; font-family: Aptos;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">Jefferson Lab Staff Scientist</span></p>
<p style="margin-top: 0px; margin-bottom: 0px; font-family: Aptos;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">Office: B122</span></p>
<p style="margin-top: 0px; margin-bottom: 0px; font-family: Aptos;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">Phone: 757-269-7750</span></p>
<p style="margin-top: 0px; margin-bottom: 0px; font-family: Aptos;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">Email: dilks@jlab.org</span></p>
</blockquote>
</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Clas12_first_exp <clas12_first_exp-bounces@jlab.org> on behalf of Stepan Stepanyan via Clas12_first_exp <clas12_first_exp@jlab.org><br>
<b>Sent:</b> Thursday, April 17, 2025 09:31<br>
<b>To:</b> Timothy Hayward <haywardt@mit.edu>; Latifa Elouadrhiri <latifa@jlab.org>; Harut Avagyan <avakian@jlab.org>; Valery Kubarovsky <vpk@jlab.org>; Rafayel Paremuzyan <rafopar@jlab.org>; Raffaella De Vita <devita@jlab.org><br>
<b>Cc:</b> Latifa Elouadrhiri via Clas12_first_exp <clas12_first_exp@jlab.org>; Nathan Baltzell <baltzell@jlab.org><br>
<b>Subject:</b> Re: [Clas12_first_exp] [EXTERNAL] RGA Fa18 Files cooked with 11.1.1 (DAF)</font>
<div> </div>
</div>
<div class="BodyFragment"><font size="2"><span style="font-size:11pt;">
<div class="PlainText">Hello Timothy,<br>
<br>
I forgot to ask at yesterday’s meeting about the discrepancy in beam charge reporting in DSTs between Pass-2 and the new cooked fall 2018 data. Was this resolved, perhaps I missed it. I am wondering about it as we are advancing with Spring 2018 cooking.<br>
<br>
Thanks,<br>
Stepan<br>
<br>
> On Mar 18, 2025, at 11:57 AM, Timothy Hayward via Clas12_first_exp <clas12_first_exp@jlab.org> wrote:<br>
> <br>
> Dear RGA,<br>
> <br>
> We have cooked a set of Fall 2018 runs, using the same software we will use for the Spring 2018 data, to further assess the potential of the modern tracking algorithms and upgrades. You can find the data at<br>
> <br>
> /volatile/clas12/rg-a/production/pass0/Fall18/fa18_dst_2025_inb/<br>
> /volatile/clas12/rg-a/production/pass0/Fall18/fa18_dst_2025_outb/<br>
> <br>
> inbending: 5040, 5043, 5046, 5047, 5051, 5053, 5116, 5119, 5120, 5125<br>
> outbending: 5424, 5425, 5432, 5434, 5435, 5442, 5452, 5454, 5464, 5467<br>
> luminosity_scans: 5418 (inb, 5nA), 5443 (outb, 5nA), 5444 (outb, 20 nA), then most of the others above are 40/45 nA etc.<br>
> <br>
> These are similar run numbers to the last time we did this study last Spring. It would be very helpful if analyzers could investigate the differences between these runs and the pass-2 versions that we have saved: /cache/clas12/rg-a/production/recon/fall2018/.<br>
> <br>
> Best regards and thank you for your help,<br>
> Timothy<br>
> _______________________________________________<br>
> Clas12_first_exp mailing list<br>
> Clas12_first_exp@jlab.org<br>
> <a href="https://mailman.jlab.org/mailman/listinfo/clas12_first_exp">https://mailman.jlab.org/mailman/listinfo/clas12_first_exp</a><br>
<br>
_______________________________________________<br>
Clas12_first_exp mailing list<br>
Clas12_first_exp@jlab.org<br>
<a href="https://mailman.jlab.org/mailman/listinfo/clas12_first_exp">https://mailman.jlab.org/mailman/listinfo/clas12_first_exp</a><br>
</div>
</span></font></div>
</body>
</html>