Jim, Arnaud

Today we commissioned the CRS laser controls to allow turning on/off and changing the laser power from the control room. 

With this plus the work on the TEC from yesterday, we created a new CRS_LASER guardian with requestable states LASER_ON and LASER_OFF.

A summary of this guardian logic was written up by Claude under T2600470-v1. The main element of this logic is to make sure that the TEC is engaged before the laser is turned on.

Jim made a new laser medm screen accessible from the crs overview screen with all the new monitor channels he added on tuesday maintenance (alog, fig1) and the new guardian screen. The nominal values for the laser driver and the tec loop are shown in the ndscope attached (and the medm screenshot).

CRS_LASER.py Guardian (commited under the svn): /opt/rtcds/userapps/release/isi/common/guardian/CRS_LASER.py
crs_laser.py python script (commited under the svn): /opt/rtcds/userapps/release/isi/common/guardian/crs_laser.py (use with arguments "on" or "off")

Left to do : 

* Update the SOP with the new instructions on how to turn on/off the laser M2600128
* Finish the detailled write up of this new laser control scheme here T2600471
* Check on stability of the TEC loop overtime