| How to check that the electron detector channels are working well ? |
Slow control of the electron detector
To perform operations on the electron detector. Open the MISC... screen from the main Polarimeter EPICS screen
and then choose "Electron Detector". On this screen, active buttons appear in blue
and readback values appear on a yellow background. This screen is also reachable, by loading the file ComptonElectron.adl located
under the home directory of hacuser on the hac computer.
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The calibration
The calibration is used for debugging purposes. This allows
to send a signal of known pulse height to all
the preamplifiers at the same time. It can be used to check that a channel is working
or can be used to produce triggers. If you want to use it:
- Type in a value up to 124 (60 is fine) in the calibration subwindow.
- Set the thresholds to a low value (around 5). Note that the scales are not the same.
- In the DAQ set the coincidence level to 1 plane out of 4 (see below).
- Click on the ON button.
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