[Clas12_first_exp] No RC meeting today

[Francois-Xavier Girod]

Dear Rafo

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.

I am sure others will look at those runs also to check these results.

Best regards
FX

On Mon, Oct 8, 2018 at 1:25 AM Rafayel Paremuzyan <rafopar at jlab.org> wrote:

> Dear FX,
>
> At high currents (I > 40 nA), the speared between different sectors is
> about x2 more than at lower currents,
> Is this because data at high current don't have enough statistics, or this
> is something else?
>
> Rafo
>
>
>
> On 10/07/2018 06:41 PM, Francois-Xavier Girod wrote:
>
> Dear all
>
> 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
> https://logbooks.jlab.org/entry/3605590
>
> At 45 nA I found a ratio of about 75% +/- 5% depending on the sector number
>
> Best regards
> FX
>
> Best regards
> FX
>
> On Sun, Oct 7, 2018 at 8:34 PM Rafayel Paremuzyan <rafopar at jlab.org>
> wrote:
>
>> Dear all,
>>
>> We didn't get much beam since yesterday,
>> MCC is still working on  resolving Accelerator related issues( RF
>> separator, RF zone 1L03).
>> I think there is no much to discuss for today.
>> Instead will be good if we work on the analysis of the special runs
>> (random, packed data, Lumi scans),
>> and in tomorrow's RC meeting discuss what decisions we should make in
>> terms of trigger/bit packing and the beam current.
>>
>> Rafo
>>
>>
>> On 10/06/2018 09:42 AM, Rafayel Paremuzyan wrote:
>> > Dear all,
>> >
>> > We took data up to 2:am this night and after that south linac had
>> > vacuum problems,
>> > which was solved half hour ago.
>> > We expect to get the beam soon, and the plan is to continue data
>> > taking through this weekend.
>> >
>> > There is no important items to discuss today.
>> > I will update you with the run status tomorrow by e-mail.
>> >
>> > Rafo
>>
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>>
>
>
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