[Hallb] RICH is taking cosmic muons data

[Valery Kubarovsky]

Dear All, 

On Friday September 1st before midnight RICH group started to take cosmic data with 32 tiles (96 MAPMTs, 64 pixels each) completely equipped with front-end electronics. So in total we have 6144 RICH channels. The trigger is using information from two trigger RICH tiles and two scintillator counters. Please take a look to the attached plots. 
You can find more pictures with Cherenkov rings and experimental equipment in 

https://userweb.jlab.org/~vpk/RICH12/2017_09_05%20RICH_96/ 

The signal in the center of the ring is coming from the muon hitting the front face of the MAPMT. 
It has many pixels fired. 
DAQ and front-end are working very stable. 
A lot of people and groups are participating in this project. Many thanks to all of them! 

Regards, 
Valery 

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