Cerenkov

Some importance values on Gas Cerenkov:

1, There 10 mirrors to collect the light then focusson 10 PMTs.
2, Filled with CO2: n=1.00041.
3, 1000mm for the GC in R-HRS and 1500mm for the GC in L-HRS.
4, Light emission threshold: for electron ~ 0.017 GeV/c, for pion ~ 4.8 Gev/c.

ADC Alignment:

#       Ped     Peak_obs   Peak_need   SPE         Gain        HV_old     HV_new     hv_ratio
Cer#0   422.9   668.5      722.9       235.650    1.221      -1752.0    -1787.4    1.020   
Cer#1   366.6   895.7      666.6       519.158    0.567      -1800.0    -1700.7    0.945   
Cer#2   372.9   761.6      672.9       378.643    0.772      -2001.0    -1949.9    0.974   
Cer#3   389.9   761.3      689.9       361.424    0.808      -1571.0    -1537.8    0.979   
Cer#4   517.3   883.0      817.3       355.736    0.820      -1926.0    -1888.2    0.980   
Cer#5   457.1   729.4      757.1       262.349    1.102      -1651.0    -1667.0    1.010   
Cer#6   474.8   812.3      774.8       327.507    0.889      -1650.0    -1630.7    0.988   
Cer#7   432.4   616.5      732.4       174.119    1.629      -1999.0    -2099.0    1.050   
Cer#8   409.8   592.0      709.8       172.258    1.646      -1840.0    -1934.0    1.051   
Cer#9   395.9   658.2      695.9       252.239    1.144      -1750.0    -1773.7    1.014