The following are e-mail messages regarding the operation of the HIST detector. Most recent messages are at the top.
Older messages are down below.
The HIST photomultiplier high voltage will be left at its present value and, if necessary, reset after evaluation of the calibration data. This is by way of an update and a mea culpa. First, the calibration I referred to last week took place on Day 225, and I heard from Adam Contos the data are at BU as of today. I meant to send out a memo about our intent on Monday and forgot. The rationale behind this move is that the automatic switching caused considerable confusion and showed some apparently inexplicable effets in the data.