[Sbs_software] [EXTERNAL] Online Asymmetry Analysis

[Sean Jeffas]

Hi Bogdan,

This is a good point about the half wave plate. I didn't try looking at
different IHWP states but I did a quick check below. The data is from GEN2.
We can see that the asymmetry clearly flips so that is very nice to see.

Best,
Sean

On Tue, Jan 24, 2023 at 2:07 PM Bogdan Wojtsekhowski <bogdanw at jlab.org>
wrote:

> HI Sean,
>
> It is great, thank you. In fact, we used single BB rate during data taking
> and specially analysis of GE-1, see Seamus's thesis. Such asymmetry
> should be taken into account in calculation of the false asymmetry due to
> DAQ dead time. It is also allows a cross check of the ½ plate flips.
>
> Bogdan
> ------------------------------
> *From:* Sbs_software <sbs_software-bounces at jlab.org> on behalf of Sean
> Jeffas via Sbs_software <sbs_software at jlab.org>
> *Sent:* Tuesday, January 24, 2023 1:58 PM
> *To:* sbs_software at jlab.org <sbs_software at jlab.org>
> *Subject:* [Sbs_software] [EXTERNAL] Online Asymmetry Analysis
>
> Hi All,
>
> A couple weeks ago I presented on different ideas for monitoring our
> asymmetry faster than waiting for 10's of millions of events to be
> collected. Below I have updated my slides with some new information.
>
> https://sbs.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=353
>
> As I have shown here we can combine all pion singles in BB and get a
> statistically significant asymmetry on the order of 6M events. For GEN4
> this would require about 2 days of data collection at our current rates.
> Therefore I think it would be reasonable to use this method to check the
> asymmetry every few days. This would therefore be expert driven and it
> would be helpful to have a quick check occasionally to make sure things are
> looking reasonable, although it is far from catching any issues in real
> time. Let me know if anyone has any thoughts or comments.
>
> Best,
> Sean
>
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