[Halld_src] [EXTERNAL] Re: [New Logentry] SRC accumulated statistics

[Alexander Somov]

Hi,

We know, or think that we know, yields of different channels
for different pmis,  etc.   as a function of triggers or PS triggers,
which represent the flux

So far, the detector performance remains reasonably stable over the whole
run period.  Flux normalized yields (at stringent cuts) should stay
the same during the run, that's what we monitor.

Cheers,
             Sasha



________________________________
From: Holly Szumila-Vance <hszumila at jlab.org>
Sent: Sunday, November 21, 2021 11:15 PM
To: Eliezer Piasetzky <eip at tauphy.tau.ac.il>; Alexander Somov <somov at jlab.org>
Cc: halld_src at jlab.org <halld_src at jlab.org>; Simon Taylor <staylor at jlab.org>
Subject: Re: [Halld_src] [EXTERNAL] Re: [New Logentry] SRC accumulated statistics

Hi Eli,

We have offline monitoring which applies reasonable cuts to extract SRC physics, and we monitor those event rates. They are kept here: https://docs.google.com/spreadsheets/d/1s5l2EgSeTOqRaSqvdbCpysgxTtoJn14O3SD3ccpGAJ8/edit?usp=sharing

Although it is still a few days out of date.

-Holly

On 11/21/21, 11:07 PM, "halld_src on behalf of Eliezer Piasetzky" <halld_src-bounces at jlab.org on behalf of eip at tauphy.tau.ac.il> wrote:


    Hi,

    For SRC the relevant events are with large pmiss (let say pmiss>300 MeV/c)

    To  estimate  SRC statistic we should (even online) try to estimate
    how many QE pi- or rho- production events with Pmiss>300 MeV/c we have.
    Counting triggers or meanfield (low pmiss) dominate events is not so
    relevnt and migth even be misleading.

       best regards
         eli


    On Sun, 21 Nov 2021, somov at jlab.org wrote:

    >                                           SRC accumulated statistics
    >
    >  *  Edit
    >  *  Delete
    >
    > Lognumber 3947824. Submitted by somov on Sun, 11/21/2021 - 21:31.
    >
    > Logbooks:
    > HDLOG HDTRIGGER
    > Entry Makers:
    > somov
    >
    > I put a summary of statistics accumulated at different run conditions to
    >
    > https://halldweb.jlab.org/SRC/production_2021
    >
    > (it's linked to the SRC run wiki page)
    >
    > So far, we have been getting along pretty well (with a good accelerator efficiency)
    > and completed about 57% of the experiment (based on the physics data sample
    > collected).
    >
    > We are currently taking data on LD target at 140 nA beam current, as planned. The
    > total trigger rate is about 67 kHz and the live time is 96%.
    >
    >
    >
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