Active Base Radiation Tests

Measurements
Date	Total Dose (kR)	Divider current1 (uA)	Pulse Amplitude1 (mV)	Comment1	Divider current2 (uA)	Pulse Amplitude2 (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]

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)
Fig. 2 Location of active base operational amplifiers

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