[E12-15-001] Elastics for VCS experiment

[Hamza Atac]

Hi Mark,

Do you want to run all elastics in the beginning of the experiment or run
each elastic before running the corresponding kinematics? Since it will
take some time to change the momentum settings, would it be more efficient
to run each elastic  just before we run  the corresponding kinematics run?

Regards,
Hamza

On Tue, Jul 2, 2019 at 1:50 PM Mark Jones <jones at jlab.org> wrote:

> 1 hour for single only and 1 hour for coincidence.
>
> CHeers,
>            Mark
> ------------------------------
> *From:* Hamza Atac <tuc72417 at temple.edu>
> *Sent:* Tuesday, July 2, 2019 1:45 PM
> *To:* Nikos Sparveris
> *Cc:* Mark Jones; e12-15-001 at jlab.org; Paolone
> *Subject:* Re: [E12-15-001] Elastics for VCS experiment
>
> Hi Mark,
>
> I am updating the runlist on wiki. How long do you think each run  should
> take? Would one hour be enough for each run ?
> Best regards,
> Hamza
>
>
> On Tue, Jul 2, 2019 at 1:24 PM Nikos Sparveris <sparveri at temple.edu>
> wrote:
>
> Yes Mark, agreed!
> Hamza, please update the run plan accordingly.
>
> N.
>
> ---------------------------------------------------
> Nikos Sparveris
> Associate Professor
>
> Physics Department, Temple University
> 1925 N. 12th Street
> Philadelphia, PA 19122-1801
>
> Phone: +1-215-204-7425
> ---------------------------------------------------
>
>
> On Tue, Jul 2, 2019 at 12:54 PM Mark Jones <jones at jlab.org> wrote:
>
> I would suggest that we do elastic for a range of the HMS momentum
> that we are using in VCS.
>
> Ebeam     q2    HMS mom HMS ang  SHMS mom   SHMS ang
>  4.5500  0.543     0.790          63.8          4.261             9.60
>  4.5500  0.687     0.900          60.8          4.184           10.90
>  4.5500  0.818     1.00            58.4          4.114           12.00
>
> We should do this first to check out the coincidence timing.
> The HMS timing will shift about 30-40 ns compared to the electrons
> that are presently in the HMS. I talked to Brad, so he will be available
> to adjust the coincidence trigger timing.
> We should do one run with singles SHMS trigger and then one run with
> coincidence
> trigger so that we can measure the losses due to proton nuclear
> interactions at
> these momentum.
> The rates are very high. So this should not take to long.
> Given the high rates , it might be useful to take a run with the sieve in
> the SHMS.
>
> CHeers,
>             Mark
>
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>
>
> --
> Hamza Atac
>
> Department of Physics
> Temple University
> SERC Room 413
> 1925 N. 12th Street
> Philadelphia, PA 19122-1801
> Phone: +1 215-204- <%2B1%20215-204-5971>1331
>
>

-- 
Hamza Atac

Department of Physics
Temple University
SERC Room 413
1925 N. 12th Street
Philadelphia, PA 19122-1801
Phone: +1 215-204- <%2B1%20215-204-5971>1331
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