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MUST2
SAMURAI_2018
S3-LEB-LPC
SUPERNEMO
MUGAST
EXPAND
SCALP
GALATRON
HiCARI
VELO
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Message ID: 6240
Entry time: Fri Mar 19 09:54:58 2021
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| Author: |
Adrien, Freddy and Franco |
| ExpNbr: |
e793s |
| Type: |
GRIT |
| Category: |
General |
| Status: |
Fixed |
| Target-Source: |
3-alpha |
| Subject: |
Alpha calibration and noise on MG3 and MG4 after the experiment |
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While starting the alpha source runs after the experiment we found unexpected noise on MG3 and MG4 which cannot be excluded just by masking some Y mates (The X mates were already masked for both of them). We cannot figure out the origin of this noise.
Run 652 and 653 -> alpha runs without pedestal suppression
Run 655 -> alpha run during the night with pedestal suppression. Here MG3 and MG4 are not in the trigger.
Run 658 -> alpha run after an attempt to mask some noisy strips. The number of ORD is anyway high (some 10^4) but we see some alphas on MG3 and MG4.
Run 660 -> same as 658 but with higher thresholds on X (8250) and Y (7600 on MG3 and 7950 on MG4) to write less on disk but actually nothing changes. Therefore we are writing about 2.7 GB per hour.
The other runs (654, 656, 657 and 659) can be discarded. |