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  40m Log, Page 162 of 344  Not logged in ELOG logo
ID Date Authorup Type Category Subject
  12549   Tue Oct 11 10:15:04 2016 SteveUpdateSUSPRM LR problematic again

It started here

 

Attachment 1: PRMalfoiled.png
PRMalfoiled.png
  12550   Tue Oct 11 10:38:51 2016 SteveUpdateSUS wire standoffs update

100 Sapphire prizms arrived.

 

Attachment 1: A028_-_20161010_170319.jpg
A028_-_20161010_170319.jpg
Attachment 2: A027_-_20161010_170202.jpg
A027_-_20161010_170202.jpg
  12557   Thu Oct 13 09:30:38 2016 SteveUpdateGeneralvent 79 is happening
Quote:

I have completed the following non-Steve portions of the pre-vent checklist [wiki-40m.ligo.caltech.edu]

  • Center all oplevs, transom QPDs (and IPPOS + IPANG if they are set up)
  • Align the arm cavities for IR and align the green lasers to the arms.
  • Update the SUS Driftmon values
  • Reconcile all SDF differences
  • Reduce input power to no more than 100mW (measured at the PSL shutter) by adjusting wave plate+PBS setup on the PSL table BEFORE the PMC. (Using the WP + PBS that already exist after the laser.)
  • Replace 10% BS before MC REFL PD with Y1 mirror and lock MC at low power.
  • Close shutter of PSL-IR and green shutters at the ends

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

Attachment 1: vent79precond.png
vent79precond.png
Attachment 2: venting.png
venting.png
  12559   Thu Oct 13 16:48:34 2016 SteveUpdateVACvent 79 is completed

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?

 

Attachment 1: vent_79.png
vent_79.png
  12565   Mon Oct 17 14:48:12 2016 SteveUpdatesafetysafety training

Ashley Fowler  "high shool" student received basic 40m safety training and Lydia is her guarding angle.

 

  12569   Wed Oct 19 08:28:11 2016 SteveUpdateSUSITMY_UL

Everybody is happy, except ITMY_UL or satalite box.

Gautam shows perfect form in the OMC chamber.

Attachment 1: 12hrs.png
12hrs.png
Attachment 2: vent79.jpg
vent79.jpg
  12570   Wed Oct 19 14:43:15 2016 SteveUpdateGeneral Viewports & coating of 2001

Tilted viewports installed in horizontal position. Atm2

Attachment 1: vacViewp2001.PDF
vacViewp2001.PDF vacViewp2001.PDF
Attachment 2: tiltedViewport.PDF
tiltedViewport.PDF
  12574   Thu Oct 20 09:17:08 2016 SteveUpdateVACPumpdown 80 has started

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!

 

 

 

Attachment 1: readyPd80.png
readyPd80.png
Attachment 2: beforePd80.png
beforePd80.png
Attachment 3: pd80at1h.png
pd80at1h.png
Attachment 4: 7d_atm.png
7d_atm.png
  12575   Thu Oct 20 15:59:52 2016 SteveUpdateVACPumpdown 80 has completed

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.

Attachment 1: 7hPd80.png
7hPd80.png
Attachment 2: 8hPd80.png
8hPd80.png
Attachment 3: 9hPd80.png
9hPd80.png
  12577   Fri Oct 21 09:28:21 2016 SteveUpdateVACVac Normal reached

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.

Quote:

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.

All time stamps are blank on the MEDM screens.

Attachment 1: VacNormal.png
VacNormal.png
  12582   Thu Oct 27 09:38:32 2016 SteveUpdatePEMmouse

We may have a mouse in the lab.  Do not leave any food scrap in trash ! Traps will be set.

 

Attachment 1: mouse.jpg
mouse.jpg
  12589   Mon Oct 31 16:20:50 2016 SteveUpdateVACRGA is reinstalled

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

Quote:

The RGA is removed for repaire. It's volume at atmophere and sealed.. P4 reading of 38 Torr is not correct.

 

 

  12590   Tue Nov 1 09:03:08 2016 SteveUpdateSUSseismic activity is up

Salton See is shaking again.

 

Attachment 1: seismicActivity.png
seismicActivity.png
  12593   Thu Nov 3 08:07:52 2016 SteveUpdateGeneralpower glitch

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

 

Attachment 1: powerGlitch.png
powerGlitch.png
  12601   Mon Nov 7 08:00:11 2016 SteveUpdateSUSSRM -PRM sat. amp swap

I just realized that Gautam set this test up and turned damping off......He will explane the details

 

Attachment 1: SRM.jpg
SRM.jpg
Attachment 2: SRM-UR_OK.png
SRM-UR_OK.png
  12605   Tue Nov 8 08:51:59 2016 SteveUpdatePEMmouse hole sealed

This is where the mammal came though. It is reach able from room 108 CES

Quote:

We may have a mouse in the lab.  Do not leave any food scrap in trash ! Traps will be set.

 

 

Attachment 1: CES108rs.jpg
CES108rs.jpg
  12620   Wed Nov 16 08:14:43 2016 SteveUpdateLSCDRMI locked on 1f and 3f signals

Nice job.

Quote:

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:

  1. Lock the arms, dither align
  2. Lock the PRMI on carrier and dither align the PRM to get good alignment
  3. Tried to lock the DRMI on 1f signals - this took a while. I realized the reason I had little to no success with this over the last few days was because I did not turn off the automatic unwhitening filter triggering on the demod screens. I had to tweak the SRM alignment while looking at the AS camera, and also adjust the demod phases for AS55 (MICH is on AS55Q) and REFL55 (SRCL is on REFL55I). Once I was able to get locks of a few seconds, I used the UGF servos to set the overall loop gain for MICH, PRCL and SRCL, after which I was able to revert the filter triggering to the usual settings
  4. Once I adjusted the overall gains and demod phases, the DRMI locks were very stable - I left a lock alone for ~20mins, and then took loop shape measurements for all 3 loops
  5. Then I decided to try transfering to 3f signals - I first averaged the IN1s to the 'B' channels for the 3 vertex DOFs using cds avg while locked on the 1f signals. I then set a ramp time of 5 seconds and turned the gain of the 'A' channels to 0 and 'B' channels to 1. The transition wasn't smooth in that the lock was broken but was reacquired in a couple of seconds.
  6. The lock on 3f signals was also pretty stable, the current one has been going for >10 minutes and even when it loses lock, it is able to reacquire in a few seconds

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...

 

 

Attachment 1: 5hrs.png
5hrs.png
  12626   Fri Nov 18 15:10:06 2016 SteveUpdateGeneral projector shipped out for repair

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

Quote:

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

 

  12629   Mon Nov 21 11:30:01 2016 SteveUpdatePEMrat is cut and removed

Last jump at rack Y2.

Attachment 1: rat#2.png
rat#2.png
  12633   Tue Nov 22 11:31:52 2016 SteveUpdateVACRGA is running again

The Rga was turned on yesterday.

Quote:

The RGA is removed for repaire. It's volume at atmophere and sealed.. P4 reading of 38 Torr is not correct.

 

 

Attachment 1: RGAisBack33d.png
RGAisBack33d.png
Attachment 2: pd80-560Hz-d33.png
pd80-560Hz-d33.png
Attachment 3: afterRepair1d.png
afterRepair1d.png
  12636   Wed Nov 23 11:32:13 2016 SteveUpdateVACTP3 drypump replaced again

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

Quote:

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.

Quote:

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.

All time stamps are blank on the MEDM screens.

 

  12642   Mon Nov 28 09:45:44 2016 SteveUpdateVACRGA scan at pumpdown day 40

The vacuum envelope ~1 C warmer today than 7 days ago. Bad peaks are coming down as normal.

 

Attachment 1: RGAscan_d40.png
RGAscan_d40.png
Attachment 2: d2_&_d7scan.png
d2_&_d7scan.png
Attachment 3: RGAd2.png
RGAd2.png
  12644   Tue Nov 29 11:07:37 2016 SteveUpdateLSCITMY UL glitches are back

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.

Attachment 1: gliching400d.png
gliching400d.png
  12650   Wed Nov 30 14:53:56 2016 SteveUpdateSUSnew sus wire stored in N2 filled dessicator

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.

Attachment 1: dessicatorC.jpg
dessicatorC.jpg
Attachment 2: wireN2c.jpg
wireN2c.jpg
  12654   Thu Dec 1 08:02:57 2016 SteveUpdateLSCglitching ITMY_UL_LL

 

 

Attachment 1: ITMY_UL_LL.png
ITMY_UL_LL.png
  12673   Thu Dec 8 07:56:05 2016 SteveUpdatePEMEQ6.5m Northen CA

No damage. ITMY is glitching, so it has not been damped.

 

Attachment 1: eq6.5FerndaleCA.png
eq6.5FerndaleCA.png
Attachment 2: 16d_glitching-_trend.png
16d_glitching-_trend.png
Attachment 3: EQ6.5_&4.7mFerndaleCa.png
EQ6.5_&4.7mFerndaleCa.png
  12674   Thu Dec 8 10:13:43 2016 SteveUpdateLSCglitching ITMY_UL has a history

 

 

Attachment 1: glitching__ITMY-UL_2007.png
glitching__ITMY-UL_2007.png
  12681   Thu Dec 22 09:37:20 2016 SteveUpdateVACRGA scan at day 63

Valve configuration: vacuum normal

RGA head temp: 43.5 C

Vac envelope temp: 23 C

 

Attachment 1: pd80-d63.png
pd80-d63.png
Attachment 2: pd80-580Hz-d63.png
pd80-580Hz-d63.png
  12687   Thu Dec 29 10:24:56 2016 SteveUpdatePEMEQ5.7mHawthorn NV

Sus damping restored.

 

Attachment 1: eq5.7HawthorneNV.png
eq5.7HawthorneNV.png
  12696   Mon Jan 9 09:18:47 2017 SteveUpdatePEMpower glitch

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

 

 

Attachment 1: MondayMorning.png
MondayMorning.png
  12697   Mon Jan 9 16:12:30 2017 SteveUpdateGeneralOptical Layout in DCC

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. 

Quote:

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.

 

Attachment 1: drawings_on_paper.jpg
drawings_on_paper.jpg
  12698   Tue Jan 10 14:24:09 2017 SteveUpdateVACRGA scan at day 82

Valve configuration: vacuum normal

Vacuum envelope: 23C

Rga head: 44C

 

Attachment 1: pd80VNd82.png
pd80VNd82.png
  12699   Tue Jan 10 16:20:11 2017 SteveUpdateCDSpower glitch......Raid is rebuilding

Jamie started the fm40m Raid rebuilding. It has been beeping since the power outage.

Summary pages have no reading since power glitch.

 

Attachment 1: rebuilding_in_progress.png
rebuilding_in_progress.png
  12705   Thu Jan 12 10:14:49 2017 SteveHowTosafetyclosing a door

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.

Attachment 1: odc.jpg
odc.jpg
Attachment 2: howtocloseadoor.jpg
howtocloseadoor.jpg
  12707   Thu Jan 12 13:45:58 2017 SteveHowTosafetyclosing a door

It was requested this morning.

Quote:

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.

 

  12711   Fri Jan 13 10:53:03 2017 SteveUpdatePEMdoors are fixed

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.

  12712   Fri Jan 13 14:18:28 2017 SteveUpdatePEMair condition fixed

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.

Attachment 1: PEM_120d.png
PEM_120d.png
  12737   Thu Jan 19 08:25:12 2017 SteveUpdateSUSMC1 SUS electronics investigation
Quote:
Quote:

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.

No change.

Attachment 1: MC1_MC3_ITMY_ETMX_sensors.png
MC1_MC3_ITMY_ETMX_sensors.png
Attachment 2: sensors_UL.png
sensors_UL.png
  12743   Fri Jan 20 14:42:12 2017 SteveUpdatePEMCaltech weather station

We should be able to connect to this station

  12744   Fri Jan 20 17:12:37 2017 SteveUpdatePEMEM172 mic is hooked up in the PSL

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"

Quote:

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.

white_v_ambient.pdf

 

Attachment 1: EM172c.jpg
EM172c.jpg
  12745   Mon Jan 23 10:24:01 2017 SteveUpdateSUSMC1 SUS electronics investigation

Two day plot of glitching suspentions: MC3, ITMY and ETMX

Attachment 1: 3glitchingSUS.png
3glitchingSUS.png
  12747   Mon Jan 23 17:24:26 2017 SteveUpdateOptical LeversETMY Oplev HeNe is running hot

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.

Quote:

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.

 

Attachment 1: ETMY_oplev__lasers.png
ETMY_oplev__lasers.png
  12760   Fri Jan 27 14:50:04 2017 SteveUpdateSUS wire standoffs update

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.

  12788   Thu Feb 2 12:17:48 2017 SteveUpdateGeneral USB microscope

This AmScope microscope would have 3.5x-180x magnification, calibratable measurement function, 5MP picture and good working distance to work on printed circuit boards.

 

  12802   Mon Feb 6 10:05:28 2017 SteveUpdateSUSclamped cables

The bottom 5 cable connections from Sat-Amp to Whittering Filter at 1X5 were clamped today.

Attachment 1: clamped.jpg
clamped.jpg
  12808   Tue Feb 7 16:23:49 2017 SteveUpdateGeneralpower interruption tomorrow

                                                                                                                                   received this note: at 4:11pm Tuesday, Feb 7, 2017

**PLEASE POST**

 

Building:         Campus

    

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   

  12813   Thu Feb 9 08:03:08 2017 SteveUpdateGeneral USB microscope ordered

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

Quote: CWQ6-020817

 

 

  12843   Tue Feb 21 17:05:14 2017 SteveUpdateGeneralProjector lamp replaced

This bulb was blown out on Feb 4, 2017 after 2 months of operation.

 

Attachment 1: blownup.jpg
blownup.jpg
  12848   Thu Feb 23 14:50:26 2017 SteveUpdateGeneral USB microscope returned

The microscope shipped back to the vendor for credit yesterday.

Quote:

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

Quote: CWQ6-020817

 

 

 

  12853   Mon Feb 27 15:33:10 2017 SteveUpdateVACRGA scan at day 130

Valve configuration: vacuum normal

Vacuum envelope: 23.5 C

RGA head: 46.6 C

 

Attachment 1: rgascan@130d.png
rgascan@130d.png
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