Reports until 07:55, Wednesday 13 June 2012
X1 SUS
stuart.aston@LIGO.ORG - posted 07:55, Wednesday 13 June 2012 (3108)
Triple Test Stand digital system confugration for HSTS suspensions
Following the completion of Phase 1b testing of the PR3 (HLTS) suspension, the triple test stand had to be re-configured for the MC2 (HSTS) suspension. Due to the different ADC channel allocation and cabling between these suspensions (D100059), it was necessary to use a new variant of the triple model. Previously, the x1sushxts27 model had been running, however, this process has to be stopped and the x1sushxts05 model needs to be running in its place. The x1sushxts05 model had already previously been successfully compiled (see LHO aLog entry 2649) and just needed to be installed and run.

The running model was killed using, "killx1sushxts27". The new model was installed using, "make install-x1sushxts05". The new model was started using, "startx1sushxts27".

Once up and running the MEDM screens could be set-up, as follows:-

- Set-up watchdogs in accordance with LHO aLog entry 2576.
- Foton filters had already been generated for this model (see LHO aLog entry 2649).
- Populated OSEM INPUT FILTERS with default gains (1) and offsets (-15000) for M1, M2 and M3.
- Populated COIL OUTPUT FILTERS with correct sign conventions for M1, M2 and M3.
- Populated OSEM2EUL matrix components, using "make_sushsts_projections.m" for M1, M2 and M3.
- Populated EUL2OSEM matrix components, using "make_sushsts_projections.m" for M1, M2 and M3.
- Populated SENSALIGN matrix components for M1, M2 and M3.
- Populated DRIVEALIGN matrix components for M1, M2 and M3.
- Configured DAMP FILTERS with same parameters used for LLO HSTSs.
 
Once this environment had been completely set-up a BURT snapshot has been taken "20120613_x1sushxts05_MC2.snap", which has been relocated to the following path:- /opt/rtcds3/tst/x1/cds_user_apps/trunk/sus/x1/burtfiles. This snapshot has also been committed to the svn as of this entry.

The triple test stand should now have all the functionality required to allow open-light measurements to be made on OSEMs, for real-time visualisation of OSEM alignment and for taking damped and undamped transfer functions etc.