 Mon Apr 22 17:43:09 2013, Steve, Update, 40m Upgrading, ETMY optical table & enclosure is ready for optics 
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Quote:
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Wed Jun 29 08:20:04 2016, Steve, Update, SUS, First Contact shelf life
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We'll follow LIGO policy:
Our policy is to use first contact within 1 year of purchase for use in the interferometers.
For inspection use I am comfortable with out-of-date use.
GaryLinn offered their indate First Contact for use.
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 Fri Jun 6 16:47:04 2008, josephb, Configuration, Cameras, GC650 scatter images of 1064nm light
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Took images similar to the scattered light images from earlier, except with the CCD GC650 camera. The first three attached plots are an average of all
200 images, an average of the first 100 and then an average of the last 100 images.
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Fri Jul 12 09:00:10 2013, Steve, Update, General, Halogen illumination cables disconnected
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Alex and Steve,
Old halogen chamber illuminator cabling disconnected and potenciometer board removed at 1Y1 in order to give room for pd calibration fibre set
up. |
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Fri Jul 12 12:30:47 2013, manasa, Update, General, Halogen illumination cables disconnected
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Quote:
Alex and Steve, |
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Wed Feb 10 16:27:47 2010, steve, Configuration, General, IFO beam heights
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IN VACUUM beam heights are ALL 5.5" This is measured from the top of the optical table to the
center of all TMs, mirrors and other optical components. This beam is ~36" above the floor.
PSL (inside of enclosure) main-output beam: PMC, MZ, RC and ISS are at 3" heights. |
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Mon Aug 25 09:56:21 2014, Steve, Update, IMC, IMC WFSs upgrade
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The Napa earth quake magnitude 6 did not have any effect on the suspensions.
The Goy phase upgrade was done nicely. The IOO pointing did not change. Credit owned to Nick and Andres. |
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Wed Oct 3 07:41:23 2012, Steve, Update, SUS, MC2 sus damping restored
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| This is the third morning in a row that the MC2 was tripped. Would you look at it Koji? |
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Wed Oct 3 23:24:05 2012, Koji, Update, SUS, MC2 sus damping restored
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Quote:
This is the third morning in a row that the MC2 was tripped. Would you look at it Koji? |
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Sun Oct 7 15:05:42 2012, Den, Update, SUS, MC2 sus damping restored
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Quote:
This is the third morning in a row that the MC2 was tripped. |
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Tue Oct 2 07:45:49 2012, Steve, Update, SUS, MC2 & PRM sus damping restored
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Mon Aug 8 13:24:00 2011, steve, Metaphysics, Treasure, Monday morning
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Quote:
Just a reminder that a film crew will be here Monday morning, filming Christian Ott for some Discovery channel show. |
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Wed Oct 17 11:15:05 2012, Den, Update, SUS, PITCH damping needed
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Quote:
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Thu Oct 18 02:42:38 2012, Den, Update, SUS, PITCH damping needed 7x
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Quote:
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Fri Oct 19 18:30:07 2012, Den, Update, SUS, PITCH damping needed
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CQuote:
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Sat Oct 20 01:23:56 2012, Den, Update, SUS, PITCH damping needed
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Quote:
Measurements confirm that damping using small actuation magnets reduces pitch Q by a factor of 4 and is not enough. |
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Sat Oct 20 20:37:55 2012, Den, Update, SUS, PITCH damping needed
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Quote:
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Mon Oct 22 11:26:12 2012, rana, Update, SUS, PITCH damping needed
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Too bad - I thought it would at least give a little damping. Since we want the viscous-like energy loss to be ~49x larger, we need to have the
field modulation in the damper (not dumper) increase by ~7. |
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Tue Oct 23 01:46:53 2012, Den, Update, SUS, PITCH damping needed
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Quote:
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Tue Oct 23 17:12:30 2012, Den, Update, SUS, PITCH damping needed
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Koji and Steve pointed out that previous design of a damping bracket was a bit complicated to manufacture. So I made it simpler and
also added a tap hole for original yaw damping. We'll give drawing to Mike in the machine shop tomorrow morning.
I've purchased K&J magnets for eddy current damping, they should be here in 2 days. |
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Tue Oct 23 18:18:29 2012, Jenne, Update, SUS, PITCH damping needed
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Quote:
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Wed Oct 24 01:02:10 2012, Koji, Update, SUS, PITCH damping needed
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| Wow... This is even more complicated than the original "Y" design... |
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Mon Oct 29 18:14:55 2012, Den, Update, SUS, PITCH damping needed
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We've received all parts that we need for eddy current damping. I've made an estimate of Q with dirty tip-tilt. It looks fine (Q~1)
We need to check ring magnets for vacuum compatibility. Bob start baking on Friday. |
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Wed Feb 22 08:54:17 2017, steve, Update, PEM, PSL enclousure particle count
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ETMX sus damping recovered. PSL enclousure is dusty at 20V rotation speed. Rainy days as outside condition.
Quote:
The MET#1 particle counter |
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Tue Jan 16 11:05:51 2018, gautam, Update, PSL, PSL shelf - AOM power connection interrupted
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While moving the RefCav to facilitate the PSL shelf install, I bumped the power cable to the AOM driver. I will re-solder
it in the evening after the shelf installation. PMC and IMC have been re-locked. Judging by the PMC refl camera image, I may also have bumped the camera
as the REFL spot is now a little shifted. The fact that the IMC re-locked readily suggests that the input pointing can't have changed significantly |
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Tue Jan 16 21:46:02 2018, gautam, Update, PSL, PSL shelf - AOM power connection interrupted
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Johannes informed me that he touched up the PMC REFL camera alignment. I am holding off on re-soldering the AOM driver power as I could use another pair
of hands getting the power cable disentangled and removed from the 1X2 rack rails, so that I can bring it out to the lab and solder it back on.
Is anyone aware of a more robust connector solution for the type of power pins we have on the AOM driver? |
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Fri Jan 12 10:26:24 2018, Steve, Update, PSL, PSL shelf work schedule
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Measurements for good fit were made. The new shelf will be installed on next Tuesday at 2pm
The reference cavity ion pump is in the way so the cavity will be moved 5" westward. The shelf height space will be 10"
Under shelf working height 18" to optical table. |
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Wed Oct 17 08:30:49 2012, Steve, Update, SUS, PTICH damping needed
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Quote:
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Mon Mar 3 13:58:10 2008, steve, Update, Computers, RFM Network are down
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| The CODAQ_RFNETWORK are down, except C1SUSVME & AWG |
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Mon Mar 3 19:34:40 2008, rana, Update, Computers, RFM Network are down
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[quote]The CODAQ_RFNETWORK are down, except C1SUSVME & AWG[/quote]
All of the FE machines were found to be down this afternoon. I called Alex and he suggested several
things which didn't work (restart EPICS tasks, power cycle RFM switch, etc.).
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Thu Jun 6 15:46:10 2013, Max Horton, Summary, General, Smart UPS 2200 Batteries Replaced
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Replaced the batteries successfully in the control room. We just had to switch the clips from the old batteries to the new one, which we didn't
know was possible until now. |
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Wed Mar 23 11:55:47 2016, Steve, Update, General, Smart UPS 2200 Battery Replaced
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Batteries replaced in control room UPS after 3 years from replaceUPSbattery.com
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Thu Apr 27 16:41:13 2017, Eric Gustafson, Update, LSC, Status of the 40 m PD Frequency Response Fiber System
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There two reports in the DCC describing the state of the system as of October 2014 including: (1) Alex Cole’s “T1300618 Automated
photodiode Frequency Response Measurement System” and a Wiki created by Alex Cole where there are some instructions on the Master Script at https://wiki.ligo.caltech.edu/ajw?AlexanderCole
And (2) |
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Tue Apr 9 21:27:48 2013, Jenne, Update, 40m Upgrading, TRY temporarily in place
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Quote:
I've used a Y1 mirror to steer the Y transmission to an R98% BS. The reflected beam falls on PDA520 and the transmitted beam is steered to |
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Thu Feb 2 12:17:48 2017, Steve, Update, General, USB microscope
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This AmScope microscope
would have 3.5x-180x magnification, calibratable measurement function, 5MP picture and good working distance to work on printed circuit boards.
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Thu Feb 9 08:03:08 2017, Steve, Update, General, USB microscope ordered
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http://www.amscope.com/3-5x-180x-boom-stand-trinocular-zoom-stereo-microscope-with-144-led-ring-light-and-10mp-camera.html
will be ordered today.
The actual unit we are getting has lockable zoom for better repeatability after calibration: SM-3NTPZZ-144 |
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Thu Feb 23 14:50:26 2017, Steve, Update, General, USB microscope returned
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The microscope shipped back to the vendor for credit yesterday.
Quote:
http://www.amscope.com/3-5x-180x-boom-stand-trinocular-zoom-stereo |
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Wed Oct 19 14:43:15 2016, Steve, Update, General, Viewports & coating of 2001
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| Tilted viewports installed in horizontal position. Atm2 |
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Thu Jul 26 15:11:18 2018, Steve, Update, General, Viewports & coating of 2001
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New optical quality BK-7 windows in 2001 [4 substrates ] AR coated R<0.75 % for 630-1064nm "
Azury BLue" broadband : TRX, TRY, ITMY-Oplev & ITMX-Oplev viewports.
The BS-Oplev and PRM-Oplev 10" CF with 5.38" diameter view was coated the same way. The window here is |
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Wed Oct 19 17:02:34 2016, rana, Update, General, Viewports & coating of 2016
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These old specs are not so bad. But we now want to get replacements for the TRX and TRY and PSL viewports that are R <0.1% at 532 and 1064 nm.
I don't know of any issues with keeping BK-7 as the substrate. |
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Wed Jun 11 08:57:49 2014, Steve, Update, PEM, air cond maintenance tomorrow morning
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The 4th week of no wet mopping of the floor and no wet wiping the vacuum envelope. |
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Fri Aug 26 10:45:17 2011, steve, Update, General, crane at ETMY is fixed
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The horizontal trolley drive stopped working at the east end this morning. It is working intermittently. In the worst case we can take |
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Mon Mar 6 09:12:59 2017, Steve, Update, safety, crane inspection 2017
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All 3 cranes inspected by professional Fred Goodbar of Konecranes and load tested with 450 lbs at max reach on Friday, March 3, 2017
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Mon Feb 12 14:56:00 2018, Steve, Update, safety, crane inspection 2018
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Our 3 cranes passed professional inspection. Fred Goodbar of Konacrane with 450 lbs load at full extension.
Certificates will be posted in 40m wiki as they arrive.
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Fri Mar 4 11:07:10 2016, Steve, Update, safety, crane inspection completes 2016 safey audit
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All 3 cranes inspected by professional and load tested with 450 lbs at max reach.
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Fri Dec 2 10:57:08 2016, steve, Update, PEM, door seal replaced
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The south end door leaky weather seals replaced.
The aim is here to get some overpressure inside / outside so the lab partical count would not depend on outside condition.
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Thu Aug 12 10:56:31 2010, steve, Update, Environment, dusty floor work in progres
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I powered down 1Y1 and 1Y2 instrument racks of MC and RF-systems this morning.
Both racks, SP table, clean tools-parts boxes and MC2 area are also covered with plastics.
Bertin Bros. Construction, Inc is working on the floor preparation. Their head man is Robby Bertin, cell 626. 831.2264 |
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Thu Feb 4 10:14:52 2016, Steve, Update, SUS, earthquake 3.5M
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Thu Jan 14 13:44:05 2016, Steve, Update, SUS, earthquake 3.6M
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No obvious sign of damage.
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Tue Sep 3 14:23:21 2013, Steve, Update, PEM, earthquakes
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~Vancuver, Canada earthquakes: magnitude 6, 5 and more shaking
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