[Rich] RICH is taking data with cosmic muons.

[Marco Contalbrigo]

Hi All,

since Friday (just before midnight) we are taking cosmic data with 32
RICH tiles (96 MAPMTs) completely equipped. This corresponds to about
1/4 of the RICH active area. The trigger is using information from two
trigger RICH tiles and two scintillator counters. Few photos of the
stand and slow control screen shots are available on the RICH Meeting
wiki (thanks to Valery).

Despite the system is not optimized yet, one can recognize several
rings due to cosmics.

Live monitor is here: https://userweb.jlab.org/~kenjo/live

A subsample of collected events can be reviewed here (thanks to
Andrey):
https://userweb.jlab.org/~kenjo/live/events/

You should realize we achieved a very important milestone!

We are happy to thanks all the people and groups participating in
this project.

Best regards, Marco.