R1:
Same as previous configuration?
Negative signals.
No pulser
2048 window / 1000 pre-gate trigger
20 threshold / 44098 DC offset
3-alpha source
R2:
Detector rotated.
Negative signals
No pulser
2048 window / 1000 pre-gate trigger
20 threshold / 44098 DC offset
3-alpha source
R3:
Detector rotated back.
Positive signals.
2.5 Hz Pulser
1024 window / 700? pre-gate trigger
50 threshold / 48098 DC offset
3-alpha source
R4:
Detector as before
Positive signals.
2.5 Hz Pulser
512 window / 600 pre-gate trigger
50 threshold / 48098 DC offset
3-alpha source
R5:
Detector as before
Positive signals.
2.5 Hz Pulser
1024 window / 650 pre-gate trigger
50 threshold / 48098 DC offset
3-alpha source
R6:
As above. No alpha source.
Data acquisition stopped very early into the run. Lost contact with digitiser?
Upon re-establishing contact, signal digitisation looks extremely coarse in y.
Previously observed behaviour. Reasons unclear.
Calibrate ADC on V1730PSD panel seems to have fixed this.
However, baseline/offset/threshold clearly changed based on data rate and signal.
Lowered threshold.
R7:
Detector as before
Positive signals.
2.5 Hz Pulser
1024 window / 650 pre-gate trigger
40 threshold / 48098 DC offset
No source.
Data acquisition stopped very early into the run. Lost contact with digitiser again?
Did not reboot either PC or VME crate. Rebooted MIDAS only. Re-established contact. All looks good
R8:
As R7
Data acquisition stopped a few hours into the run. Same as before!
Did not reboot either PC or VME crate. Rebooted MIDAS only. Re-established contact. All looks good
R9:
As R7,R8
DAQ stopped again. Rebooted. OK. Issue needs to be understood.
R10
As above
DAQ did *not* crash!
R11
As above.
R12
As above, 208Bi source placed in chamber.
No obvious signal. Run stopped
R13
Pulser settings changed during optimisation.
Source location changed during optimisation.
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Attempted to increase DC offset (->55098) and lower baseline (2400) to increase gain and make use of full
dynamic range.
Systems briefly triggers, contact with VME lost. Will need to reboot locally. |