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Pedestal shift study » History » Revision 6

Revision 5 (Jixie Zhang, 01/23/2023 01:03 PM) → Revision 6/12 (Jixie Zhang, 01/23/2023 01:06 PM)

h1. Pedestal shift study 


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 #4023-#4032: 20210120, no beam, HV on, pulse trigger 
 #4066: 20210124, no beam, HV off, pulse trigger 

 Name:_SC_D,_SC_A,_SC_B,_X,_LASPD_t,_LASPD_b,_SC_C,_PreSh_L(SDU#1),_PreSh_R(THU#1),_PreSh_T(SDU#2),_Shower_L(SDU#4),_Shower_R(THU#2),_Shower_T(SDU#5),__CerA,__CerB,__CerC, __CerD 
 HV:___1150,_1550,_1650,_0,_____800,_____900,_1600,___________1470,___________1740,___________1680,____________1030,_____________1030,____________900,___930,___930,___930, ___930 


 Do the HV scan following this table (note that CerD is connected to HV channel E08C2_ch07): 
 For Cherenkov: ch13,ch14,ch15, E08C2_ch07: 910, 930,    950,    970 
 For Shower:                       ch10,ch11: 900, 950, 1000, 1050 
 For Shower:                            ch12: 800, 850,    900,    950 

 run\HV channel(ch10-15,E08C2_ch07)        run\channel                               10     11     12     13     14     15     07 
 4023, 4024:                                 HV(ch10-15,E08C2_ch07) :    800, 900, 900, 910, 910, 910, 910 
 4025, 4026:                              950, 950, 850, 930, 930, 930, 930 
 4027, 4028:                             1000,1000, 900, 950, 950, 950, 950 
 4029, 4030:                             1050,1050, 950, 970, 970, 970, 970 
 4031, 4032:                             1030,1030, 900, 950, 950, 950, 950 
 4066:                                      4066                                        0,        0,     0,     0,     0,     0,     0  

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 20210120 
 run# ch7.00 ch7.01 ch7.02 ch7.03 ch7.04 ch7.05 ch7.06 ch7.07 ch7.08 ch7.09 ch7.10 ch7.11 ch7.12 ch7.13 ch7.14 ch7.15 ch8.00 ch8.01 ch8.02 ch8.03 ch8.04 ch8.05 ch8.06 ch8.07 ch8.08 ch8.09 ch8.10 ch8.11 ch8.12 ch8.13 ch8.14 ch8.15 
 4023    106.7    103.6     99.1    101.4    101.3     98.5    103.4     94.9    108.9    102.6    107.2    110.4    105.0    101.6    103.5     99.3    115.3    110.3    123.0    115.8    104.9    104.7    108.4    107.0    107.0    102.1    104.4    100.6    104.9    107.4    113.2    103.1 
 4024    106.8    103.7     99.2    101.4    101.2     98.5    103.6     95.0    108.9    102.7    107.2    110.6    105.2    101.6    103.5     99.5    115.2    110.5    122.9    115.5    105.0    105.0    108.6    107.2    107.0    102.1    104.3    100.7    105.1    107.6    113.2    103.1 
 4025    106.6    103.6     99.3    101.5    101.3     98.6    103.5     94.8    109.0    102.6    107.4    110.5    105.3    101.6    103.6     99.5    115.0    110.6    122.9    117.2    105.1    105.0    108.4    107.0    107.0    102.1    104.4    100.7    104.9    107.4    113.3    103.2 
 4026    106.6    103.6     99.2    101.5    101.3     98.6    103.4     95.0    109.0    102.6    107.3    110.4    105.2    101.5    103.5     99.5    115.1    110.4    122.9    117.4    105.1    104.8    108.4    107.0    106.9    102.1    104.4    100.7    104.9    107.5    113.4    103.1 
 4027    106.5    103.4     99.1    101.3    101.2     98.5    103.3     94.9    108.8    102.5    107.3    110.6    105.3    101.5    103.5     99.5    115.2    110.4    122.9    117.3    105.0    104.7    108.5    106.9    106.9    102.0    104.3    100.5    105.2    107.4    113.4    103.1 
 4028    106.5    103.5     99.3    101.5    101.2     98.5    103.4     94.9    108.8    102.4    107.3    110.5    105.3    101.5    103.4     99.4    115.1    110.4    122.8    117.4    105.0    105.0    108.4    106.9    106.9    102.0    104.4    100.8    105.1    107.4    113.3    103.2 
 4029    106.5    103.7     99.1    101.5    101.3     98.5    103.5     95.0    108.9    102.4    107.4    110.5    105.3    101.7    103.5     99.6    115.2    110.5    122.8    117.3    105.0    105.0    108.5    106.9    106.9    102.1    104.4    100.7    105.0    107.4    113.2    103.0 
 4030    106.5    103.7     99.2    101.6    101.2     98.5    103.5     95.0    108.9    102.5    107.3    110.7    105.2    101.6    103.4     99.6    115.0    110.5    122.6    117.5    105.1    105.0    108.5    106.9    107.0    102.0    104.3    100.7    104.9    107.4    113.2    103.3 
 4031    106.8    103.9     99.4    101.7    101.1     98.6    103.9     94.9    109.2    102.6    107.4    110.3    105.4    101.7    103.4     99.4    115.4    110.6    122.7    118.5    105.1    105.0    108.5    107.2    106.9    102.1    104.3    100.8    105.0    107.5    113.4    103.2 
 4032    106.7    104.0     99.3    101.7    101.3     98.7    103.8     95.1    109.3    102.7    107.5    110.6    105.4    101.8    103.5     99.4    115.1    110.7    122.8    118.7    105.1    105.0    108.5    107.2    107.0    102.1    104.4    100.7    104.9    107.7    113.3    103.3 

 20210124 
 run# ch7.00 ch7.01 ch7.02 ch7.03 ch7.04 ch7.05 ch7.06 ch7.07 ch7.08 ch7.09 ch7.10 ch7.11 ch7.12 ch7.13 ch7.14 ch7.15 ch8.00 ch8.01 ch8.02 ch8.03 ch8.04 ch8.05 ch8.06 ch8.07 ch8.08 ch8.09 ch8.10 ch8.11 ch8.12 ch8.13 ch8.14 ch8.15 
 4066    106.4    103.8     99.8    101.6    101.7     98.6    103.6     95.8    109.5    103.3    107.6    110.5    105.4    102.0    103.9     99.5    117.3    109.4    123.3    124.4    104.9    105.0    108.8    107.0    107.3    101.6    104.8    101.2    105.4    108.0    115.1    103.2 


 Summary: 
 Within a short time (several days), pedestals are stable and do not show dependence on HVs. 
 The largest change in pedestal happended to CerSum (ch8.03), which is 8.9 adc unit between HV off and HV on. 
 However, this change is still within 3 sigma. 
 The 2nd large change in pedestal happened to SC_D (ch8.00), which is 2.3 adc unit between HV off and HV on.