[E12-15-001] Elastics for VCS experiment

[Hamza Atac]

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
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