Cosmic Tests
CMS week March 2005
Andrey Marinov
Cosmic Stand
20 RE1/2 are finished and ready for
installation.
10 RE1/3 are in the cosmic stand for
testing.
Data From Cosmic Test
Strips profile of the chamber
Time distribution from each RPC station and trigger counters.
Efficiency and Cluster Size scanning.
HV current history for
each chamber
Efficiency and Cluster Size
8800 9000 9200 9400 9600
0 20 40 60 80 100
Efficiency [%]
Voltage [V]
Summary Effieciency Plots
8800 9000 9200 9400 9600
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
Av. Cl. Size
Voltage [V]
Summary Cluster Size
Currents Monitoring
Strategy for Chambers monitoring
Setting up the chambers in to the cosmic stand
Making a single run to verify continuity and proper operation.
Setting up a long scan with high statistics for Cluster Size, Efficiency, Strips Profile and Time Distribution.
Recording all these data and store in the Database
Working on tracking
t for RE1/2 and RE1/3
t for RE1/2 measurements
B
11 ns
t A and B is 0.5 ns
t A and C is 6 ns
t B and C is 6.5 ns
A – 11.5 ns
B – 11ns
C – 17.5 ns
C
t for RE1/3 measurements
A – 9 ns
B – 14 ns
C – 10 ns
t A and B is 5 ns
t A and C is 1 ns
t B and C is 4 ns
A
9 ns
C
Summary of the Bad FEB
4 FEB are with noising channels.
