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]
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]

Measurements
	Amplitude_Ref(mV)	Amplitude_181(mV)	Amplitude_193(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)[25]	388.5	998 mV	Positive Voltage 4V, Negative Voltage -4V (in contrast)[26]
DY1	89.7	386.5	951 mV		386.5	937 mV
DY2	140.3	384.5	923 mV		384.0	898 mV
DY3	179.6	382.5	877 mV		382.5	860 mV
DY4	218.5	381.5	858 mV		380.5	845 mV
DY5	257.3	379.5	825 mV		378.0	787 mV
DY6	269.2	379.5	825 mV		378.0	787 mV
DY7	335.1	379.5	825 mV		378.0	787 mV
DY8	374.2	379.5	825 mV		378.0	787 mV
DY9	485.0	379.5	825 mV		378.0	787 mV
DY10	679.0	379.5	825 mV		378.0	787 mV
Anode	821.0	379.5	825 mV		378.0	787 mV
DY5	15.6 kR	379.5	825 mV		378.0	787 mV
DY5	15.6 kR	379.5	825 mV		378.0	787 mV
DY6	19 kR	377.5	142 mV	Positive Voltage 4.2V, Negative Voltage -1.7V [27]	376.5	1064 mV	Positive Voltage -0.7V, Negative Voltage -3.4V, weird tail in waveform[28]
		378.5	808 mV	Regulator removed [29]	377.0	765 mV	Regulator removed [30]
DY1	22.3 kR	376.5	771 mV	Waveform [31]	375.0	740 mV	Waveform[32]
2023/11/17	26.2 kR	375.0	744 mV	Waveform [33]	373.0	718 mV	Waveform[34]
2023/11/20	28.4 kR	375.0	748 mV	Waveform [35]	373.0	712 mV	Waveform[36]
2023/11/21	31.9 kR	373.5	727 mV	Waveform [37]	371.0	686 mV	Waveform[38]
2023/11/22	35.25 kR	372.5	715 mV	Waveform [39]	370.5	682 mV	Waveform[40]
2023/11/29	38.66 kR	372.5	708 mV	Waveform [41]	370.5	668 mV	Waveform[42]
2023/11/30	42.1 kR	371.0	682 mV	Waveform [43]	369.0	643 mV	Waveform[44]
2023/12/01	45.5 kR	370.5	672 mV	Waveform [45]	368.0	623 mV	Waveform[46]
2023/12/08	49 kR	370.0	669 mV	Waveform [47]	367.5	634 mV	Waveform[48]

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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