 Mon Aug 8 10:35:12 2016, Steve, Update, PEM, vent 78 day 38 
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Quote:
RGA background scan |
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Wed Jul 6 10:58:07 2016, Steve, Update, VAC, vent 78 valve configuration
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Vacuum Status: Chamber Open
All chamber annuloses are vented. Vac Monitor screen is not communicating with gauges. The valve position indicator are working.
RGA is pumped by Maglev through VM2 |
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Fri Jul 1 15:48:10 2016, Steve, Update, VAC, vent 78 at 710 Torr
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I just disconnected the 6th instrument grade air cylinder from the vacuum envelope at 720 Torr. Now it will reach equilibrium through a filter as it
sucks in lab air.
This is the sure way not to over pressurize the chamber. |
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Thu Oct 13 16:48:34 2016, Steve, Update, VAC, vent 79 is completed
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IFO is at atmosphere. The MC can be locked in air now.
The doors will be coming off tomorrow 8am sharp.
Do we want to install the ITM baffles? |
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Thu Oct 13 09:30:38 2016, Steve, Update, General, vent 79 is happening
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Quote:
I have completed the
following non-Steve portions of the pre-vent checklist [wiki-40m.ligo.caltech.edu] |
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Thu Sep 25 08:21:15 2014, Steve, Update, VAC, vent day 1
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Quote:
[Steve, EricQ, Jenne] |
 Fri Sep 26 09:13:17 2014, Steve, Update, SUS, vent day 2
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| ITMY in vac table needs leveling. |
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Tue Oct 23 08:45:00 2012, Steve, Update, VAC, vent day 3
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Quote:
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Mon Sep 29 09:11:25 2014, Steve, Update, VAC, vent day 5 RGA scan
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Tue Feb 23 19:00:45 2010, kiwamu, Configuration, VAC, vent finished
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The vent has been finished.
Now the pressure inside the chamber is 760 torr, and it's getting equilibrium with the atmospheric pressure.
Therefore we are ready and can open the door of the chamber tomorrow. |
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Wed Jul 21 12:41:31 2010, kiwamu, Update, VAC, vent finished
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The vent has been finished successfully in this morning.
The vent was finished successfully this morning. |
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Thu Jul 22 08:07:27 2010, steve, Update, VAC, vent finished
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Quote:
The vent has been finished successfully in |
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Thu Jun 28 20:59:28 2012, yuta, Bureaucracy, Locking, vent for PRC check, TOMORROW!
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Koji, Jamie and I talked together and I decided to VENT TOMORROW MORNING.
Main purpose of this vent is to see if PRM is flipped or not.
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Thu Jun 28 22:08:57 2012, Jenne, Bureaucracy, Locking, vent for PRC check, TOMORROW!
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Quote:
Check List: |
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Fri Jun 29 01:49:36 2012, yuta, Bureaucracy, Locking, vent for PRC check, TOMORROW!
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Quote:
What do you mean by PR2, PR3 flipping? They are (supposed to be) flat mirrors, so obviously they should be installed correctly, |
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Tue Dec 18 10:43:20 2012, Steve, Update, VAC, vent has completed
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The 40m vacuum envelope is at atm It took 4.5 hours at ~3 Torr/min speed. Atm1
What I did: |
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Fri Oct 19 16:45:39 2012, Steve, Update, VAC, vent has started
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Quote:
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Fri Oct 19 19:26:42 2012, Jenne, Update, VAC, vent has started
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Quote:
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Wed Aug 3 16:18:30 2011, steve, Update, VAC, vent is almost finished
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P1 at 750 Torr, Vent valve VV1 is left open to atm. It will reach equilibrium in an hour. The PSL power is not turned down yet. The beam path is
blocked at two places inside the enclosure.
The low power 20 mW input MC can be locked tonight. |
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Tue Feb 23 19:07:43 2010, kiwamu and steve, Configuration, VAC, vent is completed
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Quote:
Kiwamu and Steve have started venting the 40m vacuum envelope. |
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Wed Sep 24 13:28:48 2014, Steve, Update, VAC, vent is completed
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| The vent is completed. ITMX was kicked up accidentally. Valve configuration: chamber open, RGA is pumped through VM2 Maglev |
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Wed Sep 24 16:02:58 2014, Jenne, Update, VAC, vent is completed
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[Steve, EricQ, Jenne]
ITMY and BS heavy doors are off, light doors are on. Q is aligning the IFO. |
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Wed Oct 19 14:03:41 2011, kiwamu, Update, General, vent prep : dichroic mirrors
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Status update on dichroic mirror:
I got the specification sheet of an aLIGO 2" dichroic mirror from Lisa.
https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=25232 |
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Wed Aug 22 15:47:34 2012, jamie, Summary, General, vent prepartion for fast-track vent
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We are discussing venting first thing next week, with the goal of
diagnosing what's going on in the PRC.
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Thu Aug 23 10:38:12 2012, Steve, Update, General, vent prepartion for fast-track vent
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Quote:
We are discussing venting first thing next week, with the goal of |
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Tue Oct 16 16:46:20 2012, Vent Czar and Czarina, Summary, General, vent stuff
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We're discussing the plan for the next vent. Now that we have all the tip-tilt stuff in hand, we should get ready for the big TT installation vent
ASAP. The question is what remains to be done, and when can we be ready
Stuff that needs doing: |
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Tue Oct 16 17:13:23 2012, Czarina, Summary, General, vent stuff - 4 paths
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I see 4+ possible paths for us to take, in terms of a possible vent in the next few weeks:
No Vent - Just do FPPRMI, using AS55
Mini Vent - Fix REFL path, nothing else. ~1 day at atmosphere |
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Tue Nov 6 09:45:22 2007, steve, Summary, SUS, vent sus trend
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The mc optics dragwippings were done by locking optics by eq stops and rotating-moving
cages so access were good. This technic worked well with mc1 & mc2
MC3 osems were reoriented only. |
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Tue Feb 23 13:37:04 2010, kiwamu and steve, Configuration, VAC, venting the 40m vac envelope
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Kiwamu and Steve have started venting the 40m vacuum envelope.
Preparation:
centered oplevs at resonating cavities, |
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Tue Sep 28 14:12:14 2010, steve, Update, General, vertex crane drive is out of order
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The vertex crane drive is overheating, it stopped functioning. Service man will be here tomorrow morning.
I crane was just turned on for for may be about 5 minutes. The vertical drive was fine for a while, but the horizontal did not worked
at all. |
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Fri Sep 20 16:37:30 2013, Steve, Update, VAC, vertex crane folding arm is back on
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Quote:
The folding beam removed as shown. Two man supporting it while I hammering it out. Pin was dry and it gulled into supporting hinges. |
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Wed Sep 18 14:57:12 2013, Steve, Update, VAC, vertex crane folding arm removed
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The folding beam removed as shown. Two man supporting it while I hammering it out. Pin was dry and it gulled into supporting hinges.
The rotating hinge will be machined and bushing will be added with Zerk fitting or similar. This will allow lubrication in the future.
see elog #9111 |
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Thu Sep 5 10:47:58 2013, Steve, Update, VAC, vertex crane folding issue
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[Fred Goldbar, Mike Gerfen, Dennis Coyne and Steve]
We inspected the hinge, 1.25" cross pin and I-beams. It is hard to explain what is causing the folding I-beam corner to jam against |
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Wed Oct 2 14:25:39 2013, Steve, Update, VAC, vertex crane is still out of order
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The smoke alarms were turned off and surrounding areas were covered with plastic.
The folding I-beam was ground down to be in level with the main beam. |
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Wed Nov 13 08:46:03 2013, Steve, Update, VAC, vertex crane repair completed
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nullQuote:
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Mon Sep 9 15:33:06 2013, Steve, Update, VAC, vertex crane repair is scheduled
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Quote:
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Mon Sep 30 08:53:22 2013, Steve, Update, VAC, vertex crane repair schedule has changed
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Quote:
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Thu Sep 30 09:34:58 2010, steve, Update, General, vertex crane trolly drive fixed
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Quote:
The vertex crane drive is overheating, it stopped functioning. Service man will be here tomorrow morning. |
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Tue Jan 18 10:25:23 2011, steve, Update, PEM, vertex crane work this week
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The crane people are here. The Vertex chambers are covered with plastic. The PSL HEPAs will be running on high during the day.
It is going to be disturbingly noisy and dirty during the day. Please try start working in the evening if it can not wait till next week. |
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Tue Aug 31 02:50:45 2010, kiwamu, Update, CDS, vertex suspensions controlled by the new CDS
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I plugged the new CDS to the vertex suspensions.
Now PRM, SRM, ITMs, MCs and BS are under the control of the |
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Tue Oct 12 17:42:57 2010, yuta, Update, SUS, very first measurement of Q-values for MC1
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Background:
Data aquisition system is fixed, and now we can use the Dataviewer to measure Q-values of the ringdowns for each DOF, each optics.
First of all, I measured MC1 suspention damping servo for a test. |
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Mon Aug 2 10:26:15 2010, steve, Configuration, VAC, very slow pumpdown completed
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Quote:
Bob and Steve closed BS chamber with the help of the manual Genie lift and the pump down started. The PSL shutter was |
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Mon Aug 20 09:49:01 2012, Steve, Update, Cameras, video cameras in the DARK
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Quote:
The problem with the glow on the ETMY face is due to the red light being scattered off of the optical table from the HeNe laser for |
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Fri Aug 17 08:33:46 2012, Steve, Update, Cameras, video cameras in the dark
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Quote:
I optimized the TM views with illuminator light on quad1 It actually looks better there. |
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Fri Aug 17 09:34:27 2012, Koji, Update, Cameras, video cameras in the dark
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I used the LED illuminations at ETMX and BS yesterday for a tour.
I am afraid that I left them on. |
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Fri Aug 17 10:38:15 2012, Steve, Update, Cameras, video cameras in the dark
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> I used the LED illuminations at ETMX and BS yesterday for a tour.
> I am afraid that I left them on.
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Fri Aug 17 14:45:51 2012, rana, Update, Cameras, video cameras in the dark
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The problem with the glow on the ETMY face is due to the red light being scattered off of the optical table from the HeNe laser for the OL. Why
is the red light hitting the table?
One way to fix the problem for the camera image is to insert a long pass filter (if Steve can find one). |
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Mon Aug 20 18:10:44 2012, Jenne, Update, Cameras, video capture script copied over to real scripts directory
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The videocapture.py script is now in ...../scripts/general/ , along with the videoswitch.
Also, there's a button gui on the VIDEO medm screen to capture different camera views. |
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Wed Jul 23 10:39:18 2014, Steve, Update, Cameras, video quad processors replaced
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Quad processor 2 & 3
were replaced. |
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Mon Oct 19 18:14:28 2009, rob, Update, Cameras, video switch broken
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The Chameleon HB (by Knox) video switch that we use for routing video signals into the control room monitors is broken. Well, either it's broken,
or something is wrong with the mv162 EPICS IOC which communicates with it via RS-232. Multiple reboots/resets of both machines has not yet worked.
The CHHB has two RS-232 inputs--I switched to the second one, and there is now one signal coming through to a monitor but no switching yet. I've been unable |