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Entry  Thu Sep 25 19:42:12 2014, ericq, Update, General, Vent progress 
    Reply  Fri Sep 26 12:25:34 2014, ericq, Update, General, Vent progress 
       Reply  Fri Sep 26 16:10:14 2014, ericq, Update, General, Vent update 
          Reply  Fri Sep 26 17:13:39 2014, ericq, Update, General, Vent update 
             Reply  Mon Sep 29 12:47:51 2014, ericq, Update, General, Vent update 
                Reply  Mon Sep 29 17:10:51 2014, ericq, Update, General, Vent update 
                   Reply  Mon Sep 29 18:12:24 2014, ericq, Update, General, Vent update 
                      Reply  Tue Sep 30 11:53:29 2014, ericq, Update, General, Vent update 
                         Reply  Tue Sep 30 16:18:57 2014, Steve, Update, VAC, pump down #78 has started pd78hastarted.png
                            Reply  Tue Sep 30 18:02:53 2014, Steve, Update, VAC, pump down #78 stops at 320 Torr 3h.png
                               Reply  Wed Oct 1 10:21:19 2014, Steve, Update, VAC, pump down #78 stops at 3.5 Torr pd78secondStop.png
                                  Reply  Wed Oct 1 16:26:53 2014, Steve, Update, VAC, pump down #78 completed pd78completedin25hrs.png
                                     Reply  Thu Oct 2 09:23:23 2014, Steve, Update, VAC, vent 77 vent77SRMmoved.png
                                        Reply  Fri Oct 3 10:10:37 2014, Steve, Update, VAC, cold cathode gauge reading switched CC1switched.png
                                           Reply  Fri May 8 14:30:09 2015, Steve, Update, VAC, CC1 cold cathode gauges are baked now cc1bake95C.jpg
                                              Reply  Tue May 12 14:57:52 2015, Steve, Update, VAC, CC1 cold cathode gauges are baked now 
Message ID: 10549     Entry time: Mon Sep 29 12:47:51 2014     In reply to: 10546     Reply to this: 10550
Author: ericq 
Type: Update 
Category: General 
Subject: Vent update 

Quote:
  •  Lock the SRM cage down fully (right now, has 2 clamps on, and one laying unused)
  • Align SRM for SRC flashes
  • Adjust SRM OSEM positions as needed
  • Adjust SRM oplev beam path, measure lever arm for calibration
  • Confirm beam spots on output mirrors in ITMY and BS chambers are ok

 [Koji, ericq]

We have completed the above points; the ITMY table is still level.

Despite what the wiki says, the SRM LR OSEM open voltage is ~1.97V instead of ~1.64, so we shot for half of that. 

The in-air steering of the SRM oplev return beam needs adjustment. I'll estimate the beam path length when I'm taking pictures and closing up. 

Left to do:

  • Now that AS is back on diode, lock arms and align everything. Confirm everyone's happiness. 
  • Take numerous pictures of ITMY chamber.
  • Center oplevs
  • Put doors on
  • Close shutters
  • Pump down
  • Replace MC refl Y1 with the beamsplitter
  • Turn PSL power back up

Related In-Air work:

  • Fix POY steering
  • Fix SRM oplev return steering
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