Active Base Radiation Tests

Active Divider Radiation Test

Measurements

Date	Total Dose (kR)	Divider current 195 (uA)	Pulse Amplitude 195 (mV)	Comment1	Divider current 181 (uA)	Pulse Amplitude 181 (mV)	Comment2
2023/11/08	0 kR	388.5	998 mV	Positive Voltage 4V, Negative Voltage -4V (in contrast)[1]	388.5	998 mV	Positive Voltage 4V, Negative Voltage -4V (in contrast)[2]
2023/11/08	3.2 kR	386.5	951 mV		386.5	937 mV
2023/11/09	7 kR	384.5	923 mV		384.0	898 mV
2023/11/10	10.22 kR	382.5	877 mV		382.5	860 mV
2023/11/13	12.4 kR	381.5	858 mV		380.5	845 mV
2023/11/14	15.6 kR	379.5	825 mV		378.0	787 mV
2023/11/15	19 kR	377.5	142 mV	Positive Voltage 4.2V, Negative Voltage -1.7V [3]	376.5	1064 mV	Positive Voltage -0.7V, Negative Voltage -3.4V, weird tail in waveform[4]
		378.5	808 mV	Regulator removed [5]	377.0	765 mV	Regulator removed [6]
2023/11/16	22.3 kR	376.5	771 mV	Waveform [7]	375.0	740 mV	Waveform[8]
2023/11/17	26.2 kR	375.0	744 mV	Waveform [9]	373.0	718 mV	Waveform[10]
2023/11/20	28.4 kR	375.0	748 mV	Waveform [11]	373.0	712 mV	Waveform[12]
2023/11/21	31.9 kR	373.5	727 mV	Waveform [13]	371.0	686 mV	Waveform[14]
2023/11/22	35.25 kR	372.5	715 mV	Waveform [15]	370.5	682 mV	Waveform[16]
2023/11/29	38.66 kR	372.5	708 mV	Waveform [17]	370.5	668 mV	Waveform[18]
2023/11/30	42.1 kR	371.0	682 mV	Waveform [19]	369.0	643 mV	Waveform[20]
2023/12/01	45.5 kR	370.5	672 mV	Waveform [21]	368.0	623 mV	Waveform[22]
2023/12/08	49 kR	370.0	669 mV	Waveform [23]	367.5	634 mV	Waveform[24]

Active Divider Radiation Test

Measurements

	Voltage_Ref(mV)	Voltage_181(mV)	Voltage_193(mV)
DY1	89.7	85.2	85.7
DY2	140.3	133.2	134.1
DY3	179.6	170.4	171.6
DY4	218.5	207.5	208.8
DY5	257.3	244.3	245.9
DY6	269.2	281.2	283.0
DY7	335.1	318.1	320.1
DY8	374.2	355.2	357.4
DY9	485.0	457.6	460.7
DY10	679.0	659.9	662.0
Anode	821.0	822.0	822.0

Active Divider Radiation Test

Measurements

	Reference(mV)	Modified_181(mV)	Modified_193(mV)	181(mV)	193(mV)
Delta 1	50.6	50.8	50.9	48.0	48.4
Delta 2	39.3	39.4	39.4	37.2	37.5
Delta 3	38.9	39.3	39.1	37.1	37.2
Delta 4	38.8	39.0	39.0	36.8	37.1
Delta 5	38.9	39.0	39.0	36.9	37.1
Delta 6	38.9	38.4	38.9	36.9	37.0
Delta 7	39.1	39.3	39.2	37.1	37.3
Delta 8	110.8	108.4	108.6	102.4	103.3
Delta 9	194.0	214.1	211.6	202.3	201.3
Delta 10	142.0	171.6	168.22	162.1	160.0

Gain Comparison

Gain Comparison

	Reference	ECAL #181	ECAL#193
Amp Amplifier (mV)	990	668	697
Amp Bypassed (mV)	310	207	217
Gain	3.19	3.21	3.21
Current(uA)	388.5	370	371.5

Spreadsheet from RadCon

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  Fig. 1 Location of active base voltage regulators (two black chips on the top of the PCB) exposed to radiation (left PCB). PCB with the removed regulators (right PCB)

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  Fig. 2 Location of active base operational amplifiers