[Clas12_first_exp] Run status update

[Stepan Stepanyan]

Hi Volker,

Sorry, it is typo, polarization 84.8%+/- 1.48%.

Regards, Stepan

On 10/23/18 12:28 PM, burkert wrote:
> Hi Stepan,  is the polarization really 54.7% , or is this after some 
> change in Wien angle?
> Volker
>
>
> On 10/23/18 8:58 AM, Stepan Stepanyan wrote:
>> Dear all,
>>
>> We came back from the beam studies yesterday around 4:30pm, quite 
>> smooth beam restoration. Took a Moller run with 1/2 wave plate IN, 
>> polarization 54.8+/-1.5%, plot on the run wiki has been updated. Then 
>> from 7pm we had very nice beam and took production data till 8:30am 
>> today. Planned RF recovery will be very short, only 2 hours, so we 
>> are not planning to make an access to the hall unless it is 
>> critically necessary. After beam is restored, expect some time around 
>> 10:30 am, we will continue production running. Note, last night we 
>> reverted to 2 ph.e. threshold trigger setting for HTCC since the 1 
>> ph.e. cut had the same dips in the electron phi-distributions (see 
>> log entries).
>>
>> For tomorrow and Thursday situation is not clear. Looks like 
>> accelerator is eager to provide beam to everyone in parallel to 
>> Hall-A's beam work. Will know more about details of that two days 
>> some time at 2:30 pm. There are number of things we want to do that 
>> require magnets to be OFF and also short restricted access to remove 
>> stuff from hall. I will send another email when machine plans for 
>> Wednesday and Thursday will be more clear.
>>
>> As of now, all shifts are ON, we are planning to man the counting 
>> house for Wednesday and Thursday.
>>
>> Regards, Stepan
>> RC
>> _______________________________________________
>>
>
>