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AdV-DAQ (Calibration)
vanhaevermaet - 19:36 Monday 04 August 2025 (67432) Print this report
Scattered light injections
During the calibration slot today we injected scattered light using the SNEB and SWEB benches:
SCATL z 1438358687 300 NE MIR # SNEB freq=0.2 amp=140
SCATL z 1438359017 300 WE MIR # SWEB freq=0.2 amp=140
SCATL z 1438359356 300 NE MIR # SNEB freq=0.3 amp=140
SCATL z 1438359686 300 WE MIR # SWEB freq=0.3 amp=140

To do this the CALI metatron was adjusted to do the injections during ITF locked (instead of DOWN) and restarted. The CALI_USER.ini file was updated to include the injections at amplitude of 140 (corresponding to 30-40um) and for two frequencies: 0.2 and 0.3. Each 5min duration.
Then by requesting CALIBRATED_DF_SCATTEREDLIGHT all injections are started and done automatically.

Everything looked as expected. One interesting point: at 0.3Hz the SNEB motion looks more smooth/stable than at 0.2Hz (where there are still some fluctuations).
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