Reports until 17:27, Friday 12 January 2018
H1 SQZ
daniel.sigg@LIGO.ORG - posted 17:27, Friday 12 January 2018 (40128)
SHG fast channels/TTFSS/DCPDs

Two problems prevented acquiring the SHG fast channels:

  1. The AA was not connected to the ADC
  2. The channel assignment in the model was wrong

Now fixed.

We found a loose cable inside TTFSS which prevented the readback of the LO monitor. We then tested the remote controls for the TTFSS and fixed a problem with the excitation enable logic and the gain slider calibration. The laser crystal temperature was also a factor of 5 too high, since the slow controls signal through the TTFSS implements a voltage divider. We also connected the fast channels. The only thing missing now is the HV.

Most of the DC PDs had the wrong configuration in TwinCAT. Now fixed.