[Hallb] RICH is taking cosmic muons data

Gilfoyle, Jerry ggilfoyl at richmond.edu
Wed Sep 6 14:50:37 EDT 2017

COOL! Way to go Valery and everyone in the RICH group.

Dr. Gerard P. Gilfoyle
Physics Department
University of Richmond, VA 23173  USA
e-mail: ggilfoyl at richmond.edu
phone:  804-289-8255
From: Hallb <hallb-bounces at jlab.org> on behalf of Valery Kubarovsky <vpk at jlab.org>
Sent: Tuesday, September 5, 2017 6:56 PM
To: hallb at jlab.org; dsg-rich
Subject: [Hallb] RICH is taking cosmic muons data

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


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!


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