Active Base Radiation Tests

Active Divider Radiation Test

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]

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