From the past evaluation of the beam position at the GV, OMMT1, klog20830, we evaluated the radius and so on.
Very rough evaluation, the radius of GV would be 50 mm and shield in front of OMMT1 was 45 mm, so we can see the clipping of beam at the shield of OMMT1 before clipping on the GV, I think.
Fig.1. showed the structure and images for prepared system.
After installing this camera, we may evaluate the SR2 mirror angle at remote (night time or early morning time)
Next step :
Check IR signal can be seen in current system.
Installed the camera structure to OMM chamber at the lower part of beam (for horizontal check), after evaluation, I moved camera to the horizontal part of beam (for vertical check)
Prepare the PC for operating the Camera software (I have PC in my desk, so I will move it to mine tomorrow)
Trial of remote access
(If we can have time tomorrow, I tried to move the SR2 mirror with single bounce or PRMI bright?)
After that, I prepared the PC for remote connection (If you have interested in the IP address, please contact Yokozawa). Now we can connect the remote PC via VNC.
Fig.2. showed the bright case of Camera image and Fig.3. showed the closed OMM chamber by aluminum.
I don't know the bright three image, we can start the remote measurement of SR2 mirror tomorrow morning, I think.
Reflection from Magnet?
Note that: OMMT1 equips LIGO-OSEMs, and the OSEMs are using LEDs, whose wavelength is nearly infrared (but not 1um), and the IR camera (without proper filtering) senses the infrared light clearly. Very brighter than stars which the IR camera can detect.
To distinguish the light source, it might be helpful to turn off the OSEM LEDs, if possible.