[Clas12_first_exp] Quantity of data available

[Francois-Xavier Girod]

Yes, there is some low luminosity in the approved PAC days, and we need to
agree on how to include this in our luminosity estimation to show at DNP

When using 100 days inbending and 20 days outbending, we followed the
summary:
https://www.jlab.org/Hall-B/clas12-web/Hall_B_experiment_run_groups.pdf

It says
(1) E12-11-005 requires lower luminosity operation for 39 days. Experiment
E12-12-001 declared that 80 days plus the 39 days additional low luminosity
days are equivalent to the total of 100 days
(2) E12-12-001 received approval for additional 20 days of running at
reversed Torus polarity

Also we would like to confirm the numbers 7.9e-3 C for Inbending and 7.1e-3
C for Outbending

Best regards
FX

On Wed, Oct 10, 2018 at 1:09 PM Stepan Stepanyan <stepanya at jlab.org> wrote:

> FX,
>
> Yes, this is close enough. I think there is some portion with low
> luminosity in proposed beam time, accounting which it took me to 2.3%, but
> it is fine at this level.
>
> I think everybody should use the same number on their slides.
>
> Thanks, Stepan
>
> On Oct 10, 2018, at 6:58 AM, Francois-Xavier Girod <fxgirod at jlab.org>
> wrote:
>
> Dear Stepan, all
>
> There are the numbers we have
>
> Inbending PAC days: 75 nA x 100 days = 0.648 C
> Outbending PAC days: 75 nA x 20 days = 0.129 C
>
> Using the numbers from Joseph you quoted above
> Inbending fraction: 7.9e-3 / 0.648 = 1.2%
> Outbending fraction: 7.1e-3 / 0.129 = 5.5%
> Total fraction: 0.015 / 0.7776 = 1.9%
>
> Best regards
> FX
>
> On Wed, Oct 10, 2018 at 12:40 PM Stepan Stepanyan <stepanya at jlab.org>
> wrote:
>
>> Hello Pierre,
>>
>> Yesterday at our l+l- meeting Joseph showed accumulated change for
>> intending and outbidding runs that you and him are analyzing. It is ~15 mC,
>> which corresponds to ~2.3% of total experiment charge (100 days with 75
>> nA). Ask Joseph for details, he used gated Faraday cup readings from data.
>>
>> Stepan
>>
>> > On Oct 9, 2018, at 10:02 PM, Raffaella De Vita <
>> Raffaella.Devita at ge.infn.it> wrote:
>> >
>> > Hello Pierre,
>> > I’m cc’ing FX and Will who can provide this information.
>> > Best regards,
>> >       Raffaella
>> >
>> >> On 09 Oct 2018, at 11:17, Pierre Chatagnon <chatagnon at ipno.in2p3.fr>
>> wrote:
>> >>
>> >> Hello Raffa,
>> >>
>> >> For the DNP meeting, I would like to include the current percentage of
>> cooked data available now.
>> >> From my estimation using Clas12mon I get around 5% of the total Sping
>> run.
>> >> I have seen other estimations.
>> >> I would like to know if there will be an official number to give at
>> the DNP.
>> >>
>> >> Thanks in advance
>> >>
>> >> Cheers
>> >> Pierre
>> >
>> >
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>>
>>
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>
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