[Clas12_first_exp] Experiment status

[Valery Kubarovsky]

Dear All, 

We are at 10.6 GeV with electron inbending Torus polarity now. 




Yesterday we made the beam polarization measurements with helicity delayed reporting. 


The result is: 

Beam polarization with half wave plate IN = 86.4% =/- 1.5 
Beam polarization with half wave plate OUT = 87.8% =/- 1.5 




At 22:30 we started special run with empty target at 10.6 GeV with the beam current 150 nA. 
After filling the target we started production run @ 50 nA around 5:00AM. 



The accelerator is doing RF recovery and Hall is in a control access. 

We will continue production data taking as soon as beam will be available. 




We are in production mode with stable trigger and DAQ configurations. 

No changes are expected in the nearest future. By this reason the RC meeting is cancelled today 

until somebody has something urgent to discuss. 




Valery Kubarovsky 
Hall-B RC 
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