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	ch11	ch12	ch13	ch14	ch15	E08C2_ch07
4023-4024	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	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.