Make New Entry, Make Followup Entry
User name R. Michaels
Log entry time 11:01:49 on November 4,2008
Entry number 246618
keyword=Re: TIR helicity (L-HRS)I confirmed that in run 2779 the L-HRS helicity in TIR was too often
in the logical state "false" (equivalent to nothing plugged in).
This might have been due to a flakey connection, e.g. those ECL
cables. I tried to make them snugger. If it repeats we may want
to replace some cables.
I took access on L-HRS and at the moment all the signals (helicity,
QRT, MPS) look ok on scope and in data (fig 1, run 2792). I could
not reproduce the problem. (Analysis with "tscalroc11").
I also noticed that the target state was not plugged into TIR (LHRS),
so I've plugged that in. The inputs are, starting from the 5th:
5th .... helicity
6 ..... QRT
7 ..... MPS
8 ..... target spin UP
9 ..... target spin DOWN
And at the moment spin UP and DOWN are in the same state (true),
which is contradictory but maybe it's a condition of target work
being done (?). We'll see.
FIGURE 1
