It started here
100 Sapphire prizms arrived.
I have completed the following non-Steve portions of the pre-vent checklist [wiki-40m.ligo.caltech.edu]
All shutters are closed. Ready for Steve to check nuts and begin venting!
- checked all jam nuts
- checked all viewports are covered
- turned oplev servos off
- took pictures of medm screens: sus summs, aligned oplev centering, IFO& MC alignment biases and vac configuration
- checked particle counts
- checked crane operational safety
- closed V1, VM1, annuloses
- opened VV1 and vented with Airgas brand, Industrial Grade Nitrogen [ 99.99% ] to 25 Torr
- switched over to Airgas brand compressed air, Alphagas " AI UZ300 " with Total Hydro Carbon 0.1 PPM
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?
What about the found OSEM filters?
Ashley Fowler "high shool" student received basic 40m safety training and Lydia is her guarding angle.
Everybody is happy, except ITMY_UL or satalite box.
Gautam shows perfect form in the OMC chamber.
Tilted viewports installed in horizontal position. Atm2
Pumping again after 7 days at atmosphere.
BS, ITMY and OMC chambers were open only.
Checked: jam nuts, viewport covers and beam shutters.
Oplev servo turned off and medm screens shots taken.
New item in vacuum: green shade 14 glass beam block at IR-input [ from the PSL ] viewport to block green reflection-scatter.
Reminder: viewport is not AR coated for green!
IFO pressure 1.7E-4 Torr on new not logged cold cathode gauge. P1 <7E-4 Torr
Valve configuration: vac.normal with anunulossess closed off.
TP3 was turned off with a failing drypump. It will be replaced tomorrow.
Dry pump of TP3 replaced after 9.5 months of operation.[ 45 mTorr d3 ]
The annulosses are pumped.
Valve configuration: vac normal, IFO pressure 4.5E-5 Torr [1.6E-5 Torr d3 ] on new ITcc gauge, RGA is not installed yet.
Note how fast the pressure is dropping when the vent is short.
All time stamps are blank on the MEDM screens.
We may have a mouse in the lab. Do not leave any food scrap in trash ! Traps will be set.
Quad rods and ionizer kit: consisting of repeller cage, anode grid, focus plate and filament were replaced....... under repair # RGA200/12 ECA 100416-12967
The electronic ECU is not connected. It is beeing pumped at IFO ITcc 9.7E-6 Torr vacNormal
The RGA is removed for repaire. It's volume at atmophere and sealed.. P4 reading of 38 Torr is not correct.
Salton See is shaking again.
Building: Campus Wide
Date: Thursday 11/03/16 at Approx. 6:20 a.m.
Notification: Unplanned City Wide Power Glitch Affecting Campus
*This is to notify you that the Caltech Campus experienced a campus wide power glitch at approx. 6:20 a.m. this morning.
The city was contacted and they do not expect any further interruptions related to this event.
The vacuum was not effected. ITM sus damping restored. IFO room air conditions on.
PSL Innolight and ETMY Lightwave lasers turned on
I just realized that Gautam set this test up and turned damping off......He will explane the details
This is where the mammal came though. It is reach able from room 108 CES
After much trial and error with whitening gains, demod phases and overall loop gains, I was finally able to lock the DRMI on both 1f and 3f signals! I went through things in the following order tonight:
I have noted all the settings I used tonight, I will post them tomorrow. I was planning to try a DRFPMI lock if I was successful with the DRMI earlier tonight, but I'm calling it a night for now. But I think the DRMI locking is now back to a reliable level, and we can push ahead with the full IFO lock...
It remains to update the auto-configure scripts to restore the optimized settings from tonight, I am leaving this to tomorrow as well...
Vivitek D952HD sn2160130 was send out for warranty repair. It's hard to believe that it has a 5 year warranty...... RMA - WR16004483.....expected to be back by Friday, Dec 2
The projector failed just now with a pretty loud 'pop' sound - I've never been present when the lamp goes out, so I don't know if this is usual. I have left the power cable unplugged for now...
Replacement is ordered Nov 4
Last jump at rack Y2.
The Rga was turned on yesterday.
TP3 drypump replaced at 655 mTorr, no load, tp3 0.3A
This seal lasted only for 33 days at 123,840 hrs
The replacement is performing well: TP3 foreline pressure is 55 mTorr, no load, tp3 0.15A at 15 min [ 13.1 mTorr at d5 ]
Valve configuration: Vacuum Normal, ITcc 8.5E-6 Torr
The vacuum envelope ~1 C warmer today than 7 days ago. Bad peaks are coming down as normal.
400 days plot. Satelite amp ITMY has been swapped with ETMY
Unlabeled sat.amps are labeled. This plot only makes sense if you know the Cuh-Razy sat amp locations.
The new SOS sus wire finally is stored in a nitrogen filled dessicator. This was recommended by Ca. Fine Wire to minimize the aging - oxidation.
The dessicator was pumped down with " aux-drypump " to 1 Torr and than filled up with N2 to 760 Torr. This was repeated 2x and the dessicator was sealed off.
No damage. ITMY is glitching, so it has not been damped.
Valve configuration: vacuum normal
RGA head temp: 43.5 C
Vac envelope temp: 23 C
Sus damping restored.
There was a power glitch last night around 1:15am
The vacuum was not effected.
PSL laser turned on, PMC locked, PSL shutter opened and MC locked.
IR lasers at the ends turned on.
East arm air cond turned on.
The computers are all done.
The last power glitch was at Nov 3, 2016
Caltech Facilities promissed to email the 40m facility drawings in Cad format.
I organized the old of optical , vacuum and facility layout drawings on paper in the old cabinet.
Manasa pointed me to the CAD drawings in the 40m SVN and I've now uploaded them to the 40m DCC Tree so that EricG and SteveV can convert them into SolidWorks.
Vacuum envelope: 23C
Rga head: 44C
Jamie started the fm40m Raid rebuilding. It has been beeping since the power outage.
Summary pages have no reading since power glitch.
The door was not locked this morning.
Please do not use this door if you can not close it!
Last person leaving the lab should check that the latch is cut by the strike plate.
It was requested this morning.
This is one of those unsolved door lock acquisition problems. Its been happening for years.
Please ask facilities to increase the strength of the door tensioner so that it closes with more force.
Control room to outside door was realigned.
It is self closing now.
Control room to IFO door lock optimized to soft closing.
All other doors lubricated by Alex of the key shop.
The old control room AC has been stick in heating mode for about 2 months. It's thermostate and fan belt was finally replaced. It was calibrated and set to 71 F ( just behind 1X6 on west wall ) around 1pm.
Out belt; sad inside
at 4 pm Rana cried
It must be too tight.
As part of the ongoing debugging, I've switched the MC1 and MC3 satellite boxes. Both MC1 and MC3 have their watchdogs shudown for the moment.
In the last 3.5 hours, there has been nothing conclusive - no evidence of any glitching in either MC1 or MC3 sensor channels. I am going to hold off on doing the LEMO cable swap test for a few more hours, to see if we can rule out the satellite box.
We should be able to connect to this station
Gautam and Steve,
It is hanging in the midle of the PSL enclosure. Wired to 1X1 to get plus and minus 15V through fuse. It's output is connected to FB c17 input.
GV: C17 corresponds to "MIC 1" in the PEM model. So the output is saved as "C1:PEM-MIC_1_OUT_DQ"
I added an EM172 to my soldered circuit and it seems to be working so far. I have taken a spectra using the EM172 in ambient noise in the control room as well as in white noise from Audacity. My computer's speakers are not very good so the white noise results aren't great but this was mainly to confirm that the microphone is actually working.
Two day plot of glitching suspentions: MC3, ITMY and ETMX
ETMY He/Ne 1103P body temp is ~45 C The laser was seated loosely in the V-mount with black rubber padding.
The enclosure has a stinky plastic smell from this black plastic. This laser was installed on Oct 5, 2016 See 1 year plot.
Oplev servo turned off. Thermocouple attached to the He/Ne
It will be replaced tomorrow morning.
On the control room monitors, I noticed that the IR TEM00 spot was moving around rather a lot in the Y arm. The last time this happened had something to do with the ETMY Oplev, so I took a look at the 30 day trend of the QPD sum, and saw that it was decaying steeply (Steve will update with a long term trend plot shortly). I noticed the RIN also seemed rather high, judging by how much the EPICS channel reading for the QPD sum was jumping around. Attached are the RIN spectra, taken with the OL spot well centered on the QPD and the arms locked to IR. Steve will swap the laser out if it is indeed the cluprit.
The 3 pieces of Sapphire v-groove test cuts are back. They look good. The suspension wire 0.0017" ( 43 micron ) is show on some of the pictures.
This AmScope microscope would have 3.5x-180x magnification, calibratable measurement function, 5MP picture and good working distance to work on printed circuit boards.
The bottom 5 cable connections from Sat-Amp to Whittering Filter at 1X5 were clamped today.
received this note: at 4:11pm Tuesday, Feb 7, 2017
Date: Wednesday, February 8, 2017
Time: 7:30 AM – 8:30 AM
Contact: Rick Rodriguez x-2576
Pasadena Water and Power (PWP) will be performing a switching operation of the
Caltech Electrical Distribution System that is expected to be transparent to Caltech,
but could result in a minor power anomaly that might affect very sensitive equipment.
IMPACT: Negligible impact......?
There may be temporary power interruption tomorrow!
PS:we did not see any effect
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
This bulb was blown out on Feb 4, 2017 after 2 months of operation.
The microscope shipped back to the vendor for credit yesterday.
Vacuum envelope: 23.5 C
RGA head: 46.6 C