User name Sirca
Log entry time 23:42:02 on March23,2005
Entry number 142267
keyword=Compton instructions for night shift
ComptonMonitor.adl is running in a separate workspace on adaql7.
Leave the strip-charts running.
Pay attention to Cavity Power which should not drop below 800
(reads about 1150 without beam). A large decrease in cavity
power is a sign of bad beam quality. If this happens, the
laser needs to be switched off (Laser ON/OFF button), or else
the cavity may get damaged.
One should also observe the rates in the Electron detector.
They should be less than 2 kHz per muA of beam for good beam.
To protect the Compton equipment, do not let more than 5 muA
beam through the chicane unless the rates are lower than 2 kHz/muA.
If the electron detector rates are smaller than that limit at
5 muA, you can increase the current to 40 muA. If you can not
satisfy that requirement, you need to request the Compton chicane
to be bypassed, and probably (up to the SL or the RC) accept
beam of any quality and take data.
When CODA in the back room stops counting (after 10^6 events),
the numbers in the ComptonMonitor.adl will not update anymore.
Go to the back room and start a new CODA run. If it gets stuck,
restore it by resetting it in a similar way than the usual DAQ CODA
in the front room.