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Hi,</div>
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<br>
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We know, or think that we know, yields of different channels <br>
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for different pmis, etc. as a function of triggers or PS triggers, <br>
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which represent the flux</div>
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<br>
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So far, the detector performance remains reasonably stable over the whole</div>
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run period. Flux normalized yields (at stringent cuts) should stay <br>
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the same during the run, that's what we monitor.</div>
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Cheers,</div>
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Sasha</div>
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<br>
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<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Holly Szumila-Vance <hszumila@jlab.org><br>
<b>Sent:</b> Sunday, November 21, 2021 11:15 PM<br>
<b>To:</b> Eliezer Piasetzky <eip@tauphy.tau.ac.il>; Alexander Somov <somov@jlab.org><br>
<b>Cc:</b> halld_src@jlab.org <halld_src@jlab.org>; Simon Taylor <staylor@jlab.org><br>
<b>Subject:</b> Re: [Halld_src] [EXTERNAL] Re: [New Logentry] SRC accumulated statistics</font>
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<div class="PlainText">Hi Eli,<br>
<br>
We have offline monitoring which applies reasonable cuts to extract SRC physics, and we monitor those event rates. They are kept here:
<a href="https://docs.google.com/spreadsheets/d/1s5l2EgSeTOqRaSqvdbCpysgxTtoJn14O3SD3ccpGAJ8/edit?usp=sharing">
https://docs.google.com/spreadsheets/d/1s5l2EgSeTOqRaSqvdbCpysgxTtoJn14O3SD3ccpGAJ8/edit?usp=sharing</a><br>
<br>
Although it is still a few days out of date.<br>
<br>
-Holly <br>
<br>
On 11/21/21, 11:07 PM, "halld_src on behalf of Eliezer Piasetzky" <halld_src-bounces@jlab.org on behalf of eip@tauphy.tau.ac.il> wrote:<br>
<br>
<br>
Hi,<br>
<br>
For SRC the relevant events are with large pmiss (let say pmiss>300 MeV/c)<br>
<br>
To estimate SRC statistic we should (even online) try to estimate<br>
how many QE pi- or rho- production events with Pmiss>300 MeV/c we have.<br>
Counting triggers or meanfield (low pmiss) dominate events is not so<br>
relevnt and migth even be misleading.<br>
<br>
best regards<br>
eli<br>
<br>
<br>
On Sun, 21 Nov 2021, somov@jlab.org wrote:<br>
<br>
> SRC accumulated statistics<br>
><br>
> * Edit<br>
> * Delete<br>
> <br>
> Lognumber 3947824. Submitted by somov on Sun, 11/21/2021 - 21:31.<br>
> <br>
> Logbooks:<br>
> HDLOG HDTRIGGER<br>
> Entry Makers:<br>
> somov<br>
> <br>
> I put a summary of statistics accumulated at different run conditions to<br>
> <br>
> <a href="https://halldweb.jlab.org/SRC/production_2021">https://halldweb.jlab.org/SRC/production_2021</a><br>
> <br>
> (it's linked to the SRC run wiki page)<br>
> <br>
> So far, we have been getting along pretty well (with a good accelerator efficiency)<br>
> and completed about 57% of the experiment (based on the physics data sample<br>
> collected).<br>
> <br>
> We are currently taking data on LD target at 140 nA beam current, as planned. The<br>
> total trigger rate is about 67 kHz and the live time is 96%.<br>
> <br>
> <br>
><br>
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