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Gatemaster 14



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FCAL Cosmic Ray Muon Trigger

This trigger consisted of the coincidence of two scintillator paddles (not associated with the main detector). The first paddle is located above the HV relay racks in the AP50 service hall and is 'directly' above the FCAL position. The second paddle was located in the cable trays directly above the FCAL itself in the AP50 tunnel. The two paddles are separated by /e835/people/20 feet with 12 feet of concrete between. It is assumed a coincidence is caused by a nearly straight down cosmic ray muon. The cosmic ray muon should then pass into the FCAL and hopefully travell through all 14 rows of modules transverse to the nominal axis of each module. These signals were used in E760 to monitor the status of the FCAL. This trigger was active for when the E835 FCAL1 was in place

The trigger's run history can be found on the PRUDE page. *

E835 Home Page


Last update September 17, 1997
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