 Fri Apr 29 08:34:40 2022, JC, Update, VAC, RGA Pump Down 
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Jordan and I, in order to start pumpig down the RGA Volume, we began by opening V7 and VM. Afterwards, we started RP1 and RP3. After this, the pressure
in the line between RP1, RP3, and V6 dropped to 3.4 mTorr. Next, we tried to open V6, although an error message popped up. We haven't been able
to erase it since. But we were able to turn on TP2 with V4 closed. The pressure in that line is reporting 1.4 mTorr. |
 Mon May 2 10:00:34 2022, Jordan, Update, VAC, TP3 Forepump tip seal replacement
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[JC, Jordan]
Jordan recieved the new tip seal Friday afternoon and I continued the replacement process in the morning. Finishing up, we proceeded to test
the pump in the Clean and Bake room. The pump's pressure lowered to 110 mTorr, and we continue pumping so the seal can recieve a good fitting. |
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Tue May 3 13:18:47 2022, JC, Update, VAC, RGA Pump Down
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Jordan, Tega, JC
Issue has been resolved. Breaker on RP1 was tripped so the RP1 button was reporting ON, but was not actually on which continuously tripped the
V6 interlock. Breaker was reset, RP1 and RP3 turned on. The V6 was opened to rough out the RGA volume. Once, pressure was at ~100mtorr, V4 was opened to |
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Fri May 20 12:42:23 2022, Tega, Update, VAC, Door installation on the end stations
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[JC, Tega, Chub]
Today we installed the 200 lbs doors on the end station chambers. |
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Tue May 24 10:37:09 2022, Tega, Update, VAC, added FRG channels to slow channel ini file
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[Vacuum gauge sensors]
Paco informed me that the FRG sensor EPICS channels are not available on dataviewer, so I added them to slow channels ini file (/opt/rtcds/caltech/c1/chans/daq/C0EDCU.ini).
I also commented out the old CC1, CC2, CC3 and CC4 gauges. A service restart is required for them to become available but this cannot be done right now |
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Tue May 24 11:04:53 2022, JC, Update, VAC, Beginning Pumpdown
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[JC, Jordan, Paco, Chub]
We began with the pumpdown this morning. We started with the annulus volume and proceeded by using the following:
1. Isolate the RGA Volume by closing of valves VM3 and V7. |
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Wed Jun 8 16:03:12 2022, Koji, Update, VAC, Power Outage 220608: Vacuum Recovery
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=== Observation ===
TP1/2/3 failed. AUX RP did not survive the power outage (of course)
=== Initial Recovery of TP2/TP3 ===
Stopped TP1/2/3
Restored RP AUX at the wall breaker module
Restarted TP2/3
=== Rough |
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Wed Jun 15 07:26:35 2022, JC, Update, VAC, Beginning Pumpdown
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[Jordan, JC]
Jordan and I went in to retore the Vacuum System back to it's original state before the power loss on June 8, 2022. The process went smoothly
as we first closed V7 and opened VM3 (in that order). |
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Fri Jul 8 14:03:33 2022, JC, HowTo, VAC, Vacuum Preparation for Power Shutdown
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[Koji, JC]
Koji and I have prepared the vacuum system for the power outage on Saturday.
Closed V1 to isolate the main volume.
Closed of VASE, VASV, VABSSCI,VABS, VABSSCO, VAEV, and VAEE.
Closed V6, then |
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Mon Jul 11 15:26:12 2022, JC, HowTo, VAC, Startup after Power Outage
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[Koji, Jc]
Koji and I began starting that Vacuum system up.
Reverse order step 2 of shutting down electronics. Anthing after, turn |
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Mon Jul 11 17:25:43 2022, Tega, Update, VAC, fixed obsolete reference bug in serial_XGS600 service
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Koji noticed that the FRG sensors were not updating due to reference to an obsolete modbusIOC_XGS service, which was used temporarily to test
the operation of the serial XGS sensor readout to EPICS. The information in this service was later moved into modbusIOC.service but the dependence on the
modbusIOC_XGS.service was not removed from the serial_XGS600.service. This did not present any issue before the shutdown, probably bcos the obsolete service |
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Mon Jul 11 17:41:52 2022, Koji, HowTo, VAC, Startup after Power Outage
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- Once the FRG gauge readings are back (see next elog by Tega), I could open V1 to pump down the main vacuum manifold.
- TP2/TP3 were brought back to stand-by mode (slower spinning)
- V7 was closed to separate the annuli side and TP1 |
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Fri Feb 11 16:43:09 2011, steve, Update, VIDEO, MC1 & 3 video monitor
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| I set up video monitoring of MC1 and MC3 |
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Thu Feb 17 13:20:06 2011, Suresh, Update, VIDEO, Some more labels
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[Larisa, Kiwamu, Steve and Suresh]
We continued the labeling of video cables. All exiting cables which are going to be used used in the new scheme have been labeled. |
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Wed Feb 23 16:56:17 2011, Larisa Thorne, Update, VIDEO, Cable laying...continued
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Having finished labeling the existing cables to match their new names, we (Steve, Kiwamu and Larisa) moved on to start laying new cables and labeling
them according to the list.
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Wed Mar 9 16:07:42 2011, kiwamu, Update, VIDEO, cable session
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[Koji, Steve, Suresh, Kiwamu]
The following video cables have been newly laid down :
- MC1F/MC3F (65 ft.) |
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Wed Mar 30 17:01:08 2011, Larisa Thorne, Update, VIDEO, Cable laying...continued
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[Steve, Suresh, Kiwamu, Larisa]
Only the PRM/BS cable was laid today. |
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Thu Mar 31 08:31:44 2011, Suresh, Update, VIDEO, Cable laying...continued
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The video work has crossed a milestone.
Kiwamu and Steve have shifted the three quads from the control room to the Video MUX rack (1Y1) and have wired them to the MUX.
The monitors in the control room have been repositioned and renumbered. They are now connected directly to the MUX. |
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Thu Apr 7 13:12:23 2011, Koji, HowTo, VIDEO, Video switching tip
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Long time ago, I looked at the manual of the video switcher.
http://media.extron.com/download/files/userman/Plus_Ultra_MAV_C.pdf
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Fri Apr 15 02:30:24 2011, Koji, HowTo, VIDEO, Video switching tip
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I have made a small python script to handle the video matrix.
It is too far from the perfection, but I release it as it is already useful in some extent.
The script is in the /cvs/cds/rtcds/caltech/c1/scripts/general directory. |
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Wed Apr 20 20:42:55 2011, kiwamu, Update, VIDEO, today's video session
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[Steve / Suresh / Kiwamu]
90 % of unused video cables have been removed.
Still a couple of video cables are floating around the video MUX. They will be removed in the next week's session. |
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Thu Aug 18 22:24:08 2011, jamie, Omnistructure, VIDEO, Updated 'videoswitch' script
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I have updated the 'videoswitch' program that controls the video MUX. It now includes the ability to query the video mux for the channel mapping:
controls@pianosa:~ 0$ /opt/rtcds/caltech/c1/scripts/general/videoswitch -h
Usage: |
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Thu Jul 19 02:14:37 2012, Jenne, Update, VIDEO, Made a video gui
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I learned a little bit of python scripting while looking at the videoswitch script, and I made a video medm screen.
Each monitor has a dropdown menu for all the common cameras we use (medm only lets you put a limited # of lines on a dropdown menu...when we want
to add things like OMCR or RCT, we'll need to add another dropdown set) |
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Tue Jul 24 18:33:12 2012, Yaakov, Update, VIDEO, Centering the MCR camera
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Jenne and I centered the MCR camera on the AP table.
We moved the camera as far as it could go on its mount without shifting its screws, and adjusted the optic that the camera looks at for the rest |
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Wed Jul 25 11:41:00 2012, Yaakov, Update, VIDEO, Centering the MCR camera
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Quote:
Jenne and I centered the MCR camera |
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Wed Nov 28 19:02:41 2007, Andrey, Bureaucracy, WIKI-40M Update, New WIKI-40M page describing Matlab Suspension Modeling
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I created the WIKI-40m page with some details about my today's talk on the 40-m lab meeting.
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Wed Jan 2 11:38:56 2008, tobin, Summary, WIKI-40M Update, wiki spam
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Our wiki keeps getting spammed. It turns out that you can upload attachments without a password, which is a bug. I'll ask David Barker whether there's
a fix for this. |
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Tue Aug 25 03:30:23 2009, Yoichi, Summary, WIKI-40M Update, Green lock and phase noise
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While Koji and I were discussing about the green laser lock, we wondered if the common motion of the cavity mirrors,
which won't be suppressed by the green laser servo, will cause any problem to the locking.
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Wed Oct 21 11:41:29 2009, Zach, Update, WIKI-40M Update, PSL Table Diagram wiki entry
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I made a wiki entry for the PSL table diagram under the PSL directory on the 40mHomePage. I tried to use the ImageLink macro to use a resized (smaller)
version of the diagram as a link to the full image, which it is designed to do if there is no target given, but it didn't seem to work. Instead, I had
to create a second page that had the full-sized diagram, and I used ImageLink with a smaller version to link to that page. |
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Wed Oct 21 13:07:54 2009, Koji, Update, WIKI-40M Update, PSL Table Diagram wiki entry
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http://lhocds.ligo-wa.caltech.edu:8000/40m/PSL_Table_Diagram
Thanks. I love this. Could you also put the original file that is editable for future modification by anyone?
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Wed Oct 21 15:07:45 2009, Alberto, Update, WIKI-40M Update, Photodiodes' configuration for the Upgrade
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I uploaded on the Wiki (here) the results of an inventory over our current PDs,
a list of the new ones that we're going to need for the new control scheme. |
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Thu Oct 22 15:44:16 2009, Zach, Update, WIKI-40M Update, MOPA diagram
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I have updated the PSL Diagram wiki page to include MOPA. As with the PSL diagram, clicking the photo on the main page takes you to a larger image.
The inventory is pretty meager as I didn't have time to sit and read labels (if indeed there are any). I will look through the documentation at the 40m
to see if there is a record of what is there. Again, if you know something, please amend the list!! |
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Thu Oct 22 15:49:29 2009, Zach, Update, WIKI-40M Update, PSL Table Diagram wiki entry
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Quote:
http://lhocds.ligo-wa.caltech.edu:8000/40m/PSL_Table_Diagram |
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Thu Oct 22 21:58:26 2009, Koji, Update, WIKI-40M Update, PSL Table Diagram wiki entry
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Diagram. I don't want to say PNG is an editable format for this purpose...
You have the PPT, PDF or any drawing format to create this diagram.
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Thu Oct 22 23:14:54 2009, Zach, Update, WIKI-40M Update, PSL Table Diagram wiki entry
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Quote:
Diagram. I don't want to say PNG is an editable format for this purpose... |
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Sat Jun 12 19:43:19 2010, Alberto, Update, WIKI-40M Update, IFO modeling Wiki Page updated
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Today I started writing the IFO modeling wiki page.
The idea is to make it a reference place where to share our modeling tools for the 40m. |
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Wed Jun 23 11:25:14 2010, Katharine and Sharmila, Update, WIKI-40M Update, Maglev
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Weekly update
Lab work |
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Wed Jun 23 11:31:12 2010, nancy, Update, WIKI-40M Update, Weekly Update
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This week I attended a whole lot of orientations, lectures, and meetings related to SURF. Done with general and laser safety training.
read Nergis' thesis for, and other material on WFS.
got confused with how the sidebands and shifted carrier frequencies are chosen for the Interferometer, read initial chapters of Regehr's thesis |
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Wed Jun 30 11:39:20 2010, nancy, Update, WIKI-40M Update, Weekly Update
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Wednesday Morning E-log :
Most of the time through this week, i was working towards making the simulink model work. |
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Wed Jun 30 12:13:39 2010, Sharmila, Katharine, Update, WIKI-40M Update, weekly update
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Weekly Project Update:
We are studying Haixing's circuit diagram for the quadrant maglev control circuit. We have analyzed several of the sub-circuits and plotted |
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Wed Jul 7 11:23:08 2010, Sharmila, Katharine, Update, WIKI-40M Update,
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Weekly Update:
Last Weds-Thurs, we wrote and edited our progress reports.
Tuesday (and Weds morning): Continued circuit analysis of Haixing's circuit and plotting transfer functions (almost have one for entire circuit). |
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Wed Jul 7 11:35:59 2010, Gopal, Update, WIKI-40M Update, 6.30.10 - 7.7.10 Weekly Update
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Summary of this Week's Activities:
6/30: 2nd and 3rd drafts of Progress Report
7/1: 4th draft and final drafts of Progress Report; submitted to SFP |
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Wed Jul 14 11:32:36 2010, Sharmila, Katharine, Update, WIKI-40M Update,
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Weekly update:
We correctly connected our circuit to power source to verify that it was functional and that our LED in the shadow sensor turned on. It did, |
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Wed Jul 14 13:03:04 2010, Gopal , Update, WIKI-40M Update, 7.8.10 - 7.14.10 Weekly Update
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Summary of this Week's Activities:
Wed. 7/7: COMSOL Busbar tutorials; began stack design; began base; Viton rubber research
Thurs. 7/8: Completed Viton rubber research; updated materials; finished designing the base layer |
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Wed Jul 21 11:57:59 2010, Gopal, Update, WIKI-40M Update, 7.14.10-7.21.10 Weekly Update
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Summary of this week's activities:
7/14: Analytical calculation of Viton spring constant; updated Viton values in models; experimental confirmation of COMSOL eigenfrequencies (single
stack layer) |
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Wed Jul 21 12:03:14 2010, Katharine, Sharmila, Update, WIKI-40M Update, weekly update
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This past week, we levitated our small cylindrical magnet (with the flag made from heat shrink). Though the levitated magnet didn't appear very
jittery to the eye, we looked at the PD current on the scope and could see oscillations that corresponded to the flag hitting the sides of the OSEM.
The oscillations were more pronounced as we gently hit/vibrated the lab bench, and by pounding on the bench Rana knocked the levitated magnet completely |
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Wed Jul 28 12:09:06 2010, Sharmila,Katharine, Update, WIKI-40M Update, Maglev
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We have modeled our maglev setup in simulink but we have a few corrections to make since the system goes into undamped oscillations for an impulse in
the input.
We have made a stable mount for the system and started to work on the 2X2 system using this mount. We have to figure out a way to match the magnets |
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Wed Jul 28 12:31:00 2010, Gopal, Update, WIKI-40M Update, 7.21.10-7.28.10 Weekly Update
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Summary of this week's activities:
7/21: Frequency Domain Analysis of rectangular bar; discussed with Koji how to convert complex eigenfrequencies into phase factors.
7/23: Created Wiki page about FDA; Journal Club |
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Wed Aug 4 20:58:22 2010, Gopal, Update, WIKI-40M Update, 7.28.10 - 8.4.10 Weekly Update
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Summary of this week's activities:
7/28: Finished Y-Translational 4-Stack Analysis
"Tapered Cantilever" COMSOL tutorial |
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Wed Aug 11 11:51:45 2010, Gopal , Update, WIKI-40M Update, 8.5.10 - 8.11.10 Weekly Update
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Summary of this Week's Activities:
Thursday, August 5:
X-Displacement Transfer Function Measurement |