<div><div dir="auto">Dear Rafo</div></div><div dir="auto"><br></div><div dir="auto">This is not statistics. To count electrons, I have a momentum cut, theta cut, and vertex cut. To count time based tracks I only cut on the sector to be different from that of the electron. I think the differences are systematically differences between sectors. It may also be that the differences are large because the calibration differences between sectors. </div><div dir="auto"><br></div><div dir="auto">I am sure others will look at those runs also to check these results.</div><div dir="auto"><br></div><div dir="auto">Best regards</div><div dir="auto">FX</div><div><br><div class="gmail_quote"><div dir="ltr">On Mon, Oct 8, 2018 at 1:25 AM Rafayel Paremuzyan <<a href="mailto:rafopar@jlab.org">rafopar@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Dear FX,<br>
<br>
At high currents (I > 40 nA), the speared between different
sectors is about x2 more than at lower currents,<br>
Is this because data at high current don't have enough statistics,
or this is something else?<br>
<br>
Rafo</div><div text="#000000" bgcolor="#FFFFFF"><br>
<br>
<br>
<div class="m_3362020463169032186moz-cite-prefix">On 10/07/2018 06:41 PM, Francois-Xavier
Girod wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">Dear all
<div><br>
</div>
<div>I looked at the ratio of events with positive time based
tracks normalized at 2 nA vs beam current from the
luminosity scan, and posted the corresponding plot, with
separated sectors, here</div>
<div><a href="https://logbooks.jlab.org/entry/3605590" target="_blank">https://logbooks.jlab.org/entry/3605590</a><br>
</div>
<div><br>
</div>
<div>At 45 nA I found a ratio of about 75% +/- 5% depending on
the sector number</div>
<div><br>
</div>
<div>Best regards</div>
<div>FX</div>
<div><br>
</div>
<div>Best regards</div>
<div>FX</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Sun, Oct 7, 2018 at 8:34 PM Rafayel Paremuzyan
<<a href="mailto:rafopar@jlab.org" target="_blank">rafopar@jlab.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear all,<br>
<br>
We didn't get much beam since yesterday,<br>
MCC is still working on resolving Accelerator related issues(
RF <br>
separator, RF zone 1L03).<br>
I think there is no much to discuss for today.<br>
Instead will be good if we work on the analysis of the special
runs <br>
(random, packed data, Lumi scans),<br>
and in tomorrow's RC meeting discuss what decisions we should
make in <br>
terms of trigger/bit packing and the beam current.<br>
<br>
Rafo<br>
<br>
<br>
On 10/06/2018 09:42 AM, Rafayel Paremuzyan wrote:<br>
> Dear all,<br>
><br>
> We took data up to 2:am this night and after that south
linac had <br>
> vacuum problems,<br>
> which was solved half hour ago.<br>
> We expect to get the beam soon, and the plan is to
continue data <br>
> taking through this weekend.<br>
><br>
> There is no important items to discuss today.<br>
> I will update you with the run status tomorrow by e-mail.<br>
><br>
> Rafo<br>
<br>
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</blockquote>
</div>
</blockquote>
<br>
</div>
</blockquote></div></div>