(Probably) final update of the status of the detector before the experiment:
- MG5 does not trigger on Y (no pulser, no alpha source). This can explain why in the last experiment we could not run the time calibration of its Y.
- We changed kapton on MG7 but we still miss the same part of the detector. This points to a problem of the board...
- There is nothing we can do for the moment for MG11, the re-bounding would take too long. We will keep it like this.
- MUST2 detectors have higher current than usual but the signals from alpha source are fine.
- MM1 was changed but still shows the problem of the fluctuation of current. We also tried to change the HV supply (now it's on MG6) but nothing changes. This also seems to point to a problem of the board...
- We noted that, with circulation of alcool-water liquid (but no cooling), the temperature of MG7 is around 45 degrees, about 20 degrees higher than the other Mugast detectors. |