The referenced log book entry indicates relatively stable Cerenkov gains since the last HV change: all values are still close to 60 mV. Yesterday, just after the beam came back after a lengthy no-beam period (and nearly 12 hours before the data in the referenced entry) I measured the amplitudes and - strangly - obtained values about 10% higher than at the previous adjustments (in mV, center of SPE band):tube -1 -2 -3 -4 o1 66 66 65 66 o3 68 64 66 65 o5 63 66 67 60 o7 66 66 65 62
o2 64 64 66 63 o4 62 64 65 65 o6 65 63 64 65 o8 65 63 65 63