Main INDEX
Monthly INDEX
PREV
NEXT
User name R. Michaels
Log entry time 12:30:41 on June26,2004
Entry number 126961
keyword=Septum magnet history (affects Q2)
History of the septum magnet since start of this experiment.
halog ...... date/time ........ settings ..... comments
............................... L .. R
126754 ..... 6/25 .. 02:00 ... 275.3 .. 274.4 READBACK for alignment
126826 ..... 6/25 .. 13:19 ... recommend tiny change to 275.0, 274.0
126838 ..... 6/25 .. 15:50 ... Momentum changed but the septum values
used were SETPOINT (disagrees with READBACK by 1 - 2 Amps).
now ........ 6/26 .. 12:20 .... 275.0 .. 274.0 READBACK goal.
Peter Laviolette is recovering septum now.
He will halog the setpoints and readbacks.
Note, granularity in readback is +/- 0.5 Amps (implying the original
settin in halog 126754 was as good as you can do).
If we're concerned we can, later & briefly, make two Q2
measurements with the two septum currents. Might be good anyway
to verify our sensitivity.
More history:
Spectr. DAQ Run 1178
Set L = 275.8, Read L = 275.75, Set R = 276.0, Read R = 274.75
HAPPEX Run 2412 (representative of last night)
Set L = 275.0, Read L = 274.75, Set R = 274.0, Read R = 272.75
Peter tells me he is making this setting just now:
Set L = 275.5, Read L = 274.75 - 275.25 (fluctuates)
Set R = 275.35, Read R = 273.75 - 275.25 (fluctuates)