40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 155 of 339  Not logged in ELOG logo
ID Date Authorup Type Category Subject
  11610   Thu Sep 17 08:36:14 2015 SteveUpdatePEMearth quake

No damage. The BS sensor UR 0.220 V has been low for some times.

Dataviewer does not work for long term trend.

Attachment 1: Chilian_eq_8.3M.png
Chilian_eq_8.3M.png
Attachment 2: BS_UR_0.220V.png
BS_UR_0.220V.png
Attachment 3: LowSensingV_BS-UR.png
LowSensingV_BS-UR.png
  11612   Thu Sep 17 16:04:09 2015 SteveUpdatePEMGurs

ETMY - Guralp (B-MIT) was covered with copper lined can yesterday afternoon. It's long cable is connected to ADC interface box input 1

The vertex Trillium was covered just ~2 days before Ignacio left.

ETMX - Guralp (A-Caltech) is not covered. The long 40m cable is disconnected at the the south end.

 

  11625   Mon Sep 21 11:12:14 2015 SteveUpdateVACcold cathode is flaky

CC4 cold cathode gauge jump triggered interlock to close VM1 valve to protect the RGA.

The IFO pressure is 1e-5 Torr

Vac normal was recovered by opening VM1

 

Attachment 1: cc4jumps.png
cc4jumps.png
  11633   Tue Sep 22 08:58:38 2015 SteveUpdateVACcold cathode is flaky

The cold cathode gauge is back to normal. cc4 is the last gauge is "functioning"

MKS is not responding. The spare controller and gauges are back for repair.

 

Attachment 1: 4and80days.png
4and80days.png
  11642   Fri Sep 25 11:08:33 2015 SteveUpdateSUSwire standoffs

Our last effort to change the existing Al-6061 wire standoffs was at April 2012

We requested sapphire and/or ruby materials with smaller R at the bottom of the  groove. Groove polishing was asked for.

Insaco Inc. quote 84740 as " best effort " NO POLISHING.  The groove cut to be with eximer laser.

Jeff Lewis as 9-12-2012:  the LIGO sapphire prisms grooves were NOT POLISHED  but Resonatics used the corner of a rasor blade to scrape off the

ablated material wich was redeposited in and around the grooves.
 

Attachment 1: wireStandOff_SOS.PDF
wireStandOff_SOS.PDF
  11643   Fri Sep 25 14:52:08 2015 SteveUpdateSUSETMX is not drifting

We have talked about the drift of ETMX sus on the Wednesday meeting.

It has stopped moving on Jan 8, 2015 and it has been reasanable stable since than.

 

Attachment 1: ETMXstoppedDrifting.png
ETMXstoppedDrifting.png
Attachment 2: 25daysArmsT.png
25daysArmsT.png
  11644   Fri Sep 25 17:00:38 2015 SteveUpdateVACcold cathode is flaky

The IFO pressure is estimated ~1E-6 Torr with modified Vac normal valve configuration.

CC4 is in a jumping mode between 2e-5 and 1e-6 Torr

 Pressure based interlock kicks in to close VM1   at 2e-5 Torr to protect the RGA.

I did open VM1 repeatedly in the last few mornings but as cc4 jumps VM1 closes.

As VM1  closed to RGA scans are not seeing the IFO. I will look at some scans on Monday.

Mean while I opened VM2 to lower the pressure for the RGA. This change will be read by "Current Status: Undefined State"

So do not panic, the IFO pressure is normal.

I need someone's help to raise the interlock threshold to 5e-5 Torr

I'm buying a new cold cathode gauge on Monday.

 

note: cc1 is out of order!

         just read P1  the pressure is < 7e-4 Torr  This gauge is very reliable and it is at the low end of it's range.

 

Attachment 1: flakyCC4.png
flakyCC4.png
  11654   Wed Sep 30 15:44:06 2015 SteveUpdateGeneralSun Fire X4600

Gautam and Steve,

The decommissioned server from LDAS is retired to the 40m   with 32 cores and 128GB of memory in rack 1X7   http://docs.oracle.com/cd/E19121-01/sf.x4600/

  11659   Fri Oct 2 15:11:08 2015 SteveUpdatePEMcable squashed

Cable numbered #53 from Accelerometer 4 to 1X7 / DAQ input c26 was squased while removing network card from Sun Fire x4600 today.

This cable has to be tested.

  11660   Fri Oct 2 15:33:09 2015 SteveUpdatesafetysafety training

Gautom has received 40m specific basic safety training today.

  11666   Mon Oct 5 10:11:35 2015 SteveUpdateVACRGA scan pd78 day 386

RGA background scan.

The IFO is closed off from RGA with VM1

CC4 ( and CC1)  is still flaky and it's interlock closes VM1

 

Attachment 1: RGA_background.png
RGA_background.png
  11668   Mon Oct 5 16:41:22 2015 SteveUpdateSUSETMY OL laser replaced

This JDSU 1103P laser, sn P892324 lived for 2 years. It's power output is 0.05 mW now

It was replaced with brand new JDSU 1103P,  sn P919645, Mfg date 12/2014 with 2.75 mW output.

There is 0.14 mW  light returning to the qpd = 7,250 counts without AR 632 lenses

  11695   Fri Oct 16 18:27:52 2015 SteveUpdateVAC vacuum normal condition

Vacuum normal configuration with VM1-closed, VM2-open valve positions. Power load normal 24V 0.2A

Maglev rotation 560 Hz at room temp body temp.

"NO COMM" error message on medm screen. Gauge controller pressures are read able.

All vac comp LEDs are green. We have to reboot on Monday to enable communication.

 

Attachment 1: oct16Fpm2015.png
oct16Fpm2015.png
  11705   Wed Oct 21 10:03:15 2015 SteveUpdateVACafter running out of N2

 

Quote:

[ericq, Gautam, Steve]

Following roughly the same procedure as ELOG 11354, c1vac1 and c1vac2 were rebooted. The symptoms were identical to the situation in that ELOG; c1vac1 could be pinged and telneted to, but c1vac2 was totally unresponsive. 

The only change in the linked procedure was that we did not shut down the maglev. Since I unwittingly had it running for days without V4 open while Steve was away, we now know that it can handle shorter periods of time than that...

Upon reboot, many channels were readable again, unfortunately the channels for TP2 and TP3 are still blank. We were able to return to "Vacuum normal state," but because of unknowned communication problems with VM1's interlock, we can't open VM1 for the RGA. Instead we opened VM2 to expose the RGA to the main IFO volumn, but this isn't part of the "Normal" state definite, so things currently read "Undefined state".

Precondition:

1, Pressure gauges had no communication ( NO COMM ) with c1vac2

 

2, Lost N2 supply on Oct 9 This triggered a normal all valve closed condition. At this point you replace N2 cylinders and manually swich valves to recreate VAC NORMAL configuration in the correct sequential order.

   The very last thing you do is open V1 gate valve.

   a, check TP2 that is the forepump of the Maglev. Foreline pressure to drypump  ~ 10- 100 mTorr, rotation speed 50 Krpm

   b, open V4 if P2 <1Torr

   c, check Maglev rotating at 560 Hz

   d, open V1 if P1 <500 mTorr

   e, check TP3 foreline, rotation speed and open V5 if P3 <1 Torr with VA6 closed

   f, open VA6 if PAN <1 Torr

  g, open annulos valves one by one , like VASE if PASE <1 Torr and so on...........Now the Current State: should read Vac Normal

 

3, Maglev run for 7 days with V4 closed. This encreased its foreline pressure to estimated few Torrs  and its body temp rose ~30C on the outside.

   So it was sweating and it may be back streamed.

The present RGA data is indicating that it had to be very mild.

The RGA will have better sensitivity with VM1 open and VM2 closed.

The PSL output shutter stayed open during these period is pointing  to IFO pressure stayed P1 <3 mTorr

PROBLEM: P1 and P2 plot should show nothing where there is no communication.http://nodus.ligo.caltech.edu:8080/40m/151016_182003/oct16Fpm2015.png

                   How do we check if pressure based software interlocks are working in this no communication condition?

Attachment 1: 1d_after_reboot.png
1d_after_reboot.png
  11706   Wed Oct 21 15:42:56 2015 SteveUpdateVACvacuum gauge check

Convectron gauge check:

Brand new 10 years old convectron gauge at atm was swapped into the place of existing gauges to see if they read close to 760 Torrs

They did reasonable well at the low end. I tried to imitate calibration and bring down the high end with little success.

( P1 and P2  were reading 7e-4 to ~660 Torr  The correction of the upper end pushed up the lower end too. I will correct this later

P3 and P4 high ends are way off )

The point is that they work.  Convectron gauges will be replaced and calibrated at the next vent.

Interlocks were not triggered during this test. I was expected to close the PSL shutter when P1 was reading 760 Torr

This hide some problem or  not understanding.

It was good to see CC1 and CC4 working at the moment

 

Somehow I succeded opening VM1 and closed VM2 = vacuum normal

I just hope it stays open overnight to get comparable RGA scan.

 

Attachment 1: Gauges.png
Gauges.png
  11707   Thu Oct 22 08:52:04 2015 SteveUpdateVACclean RGA scan after sweaty Maglev

Clean comparable scan at vacuum normal. There was no backstreaming.

Attachment 1: clean_scan.png
clean_scan.png
  11708   Fri Oct 23 09:55:50 2015 SteveUpdateLSCstable days
Attachment 1: stable4days.png
stable4days.png
  11719   Tue Oct 27 10:08:12 2015 SteveUpdateVAC CC vacuum gauges

CC1 and CC2 are working again. Why did they start working  again ?

 

Attachment 1: gauges_5y_vs_8d.png
gauges_5y_vs_8d.png
Attachment 2: 13.9yCC1&4.png
13.9yCC1&4.png
  11724   Fri Oct 30 17:49:27 2015 SteveUpdateSUSETMX kicked up

The oplev and  the LSC are off.

Attachment 1: ETMXkicking.png
ETMXkicking.png
Attachment 2: ETMXkickedbyOpPerror.png
ETMXkickedbyOpPerror.png
Attachment 3: ETMXstillKicking.png
ETMXstillKicking.png
Attachment 4: ETMXkickingCond.png
ETMXkickingCond.png
Attachment 5: 7hrsETMX-Y.png
7hrsETMX-Y.png
  11728   Wed Nov 4 08:04:53 2015 SteveUpdatesafetysafety training

Yutaro Enamoto, visiting graduate student of Seiji received 40m specific basic safety training.

 

Attachment 1: Yutaro.jpg
Yutaro.jpg
  11730   Wed Nov 4 15:48:58 2015 SteveUpdatePEMETMX wirestadoff vs EQ

ETMX was not much effected by this 8.3 M Chilian earthquake. It was kicked up and it was kicking for hours after it. This is a sign of instability but it maintaind it's position.

The 24 hours plot follows the tempeerature.

 

Attachment 1: 8.3mChili.png
8.3mChili.png
  11739   Mon Nov 9 09:27:44 2015 SteveUpdatePSLMC is not happy

I just turned off the PSL enclousure lights.
 

Attachment 1: ioo8d.png
ioo8d.png
  11755   Thu Nov 12 09:15:56 2015 SteveUpdateSUSITMX osems

The ITMX OSEMS are oscillating.

Attachment 1: ITMX.png
ITMX.png
  11756   Thu Nov 12 09:41:02 2015 SteveUpdatePSLPMC

The PMC is not happy and the ITMX UL OSEM is moving too much

 

Attachment 1: PMC_ITMX.png
PMC_ITMX.png
  11757   Thu Nov 12 10:22:33 2015 SteveUpdatePEMpossible vibration for 4days

Building:         San Pasqual walkway East to West

                  (Between Holliston & Wilson)         

 

Date:             Thursday 11-12-15 to Wednesday 11-18-15

 

Time:             Between 6:00 a.m. and 4:00 p.m. each day        

 

Notification:     Possible Noise Vibration

 

Contact:          Ken Lewis (626) 298-2037       

 

* Plumbing contractor will be inspecting and water jetting Storm drains

Type of interruption: (Some vehicle noise and small vibrations limited to close surrounding area)

Areas effected: San Pasqual walkway from Holliston Street to Wilson)

Potential effects: storm drain loss of use

Reason for interruption: Storm drain cleaning in preparation for rainy season

 

  11760   Fri Nov 13 15:20:24 2015 SteveUpdateSUSOSEMs

Are they oscillating or not ?

Quote:

The ITMX OSEMS are oscillating.

ETMX, ETMY and MC2 POS _biases are off. Why ?

The Epics MEDMs screens are going blank in  ~3-5 minutes reluctantly.

Attachment 1: OSEMs.png
OSEMs.png
Attachment 2: POSbiasOFF.png
POSbiasOFF.png
  11771   Tue Nov 17 10:06:53 2015 SteveUpdateGeneralwater leak in east arm
Quote:

A Caltech maintenance staff dropped by at around noon today, and told me that he had seen a small puddle of water on the other side of the door along the Y-arm that is kept locked (about 10m from the end-table, on the south side of the arm). He suspected a leak in the lab. Koji and I went down to the said door and observed that there was indeed a small puddle of water accumulated there. There isn't any obvious source of a leak on our side of the door, although the walls tiles in the area suggest that there could be a leak in one of the pipes running through the wall/under the floor. In any case, the leak doesn't seem too dramatic, and we have decided to consult Steve as to what is to be done about this once he is back on Wednesday.

The leak was found inside the wall. Fortunately the plumbers were able to access it from CES room 108

This has been leaking for sometimes. The damaged wall area is about 18 ft long and 1 ft high.

Attachment 1: eastArmLeakyPipeInsideWall.jpg
eastArmLeakyPipeInsideWall.jpg
Attachment 2: wd18ft.jpg
wd18ft.jpg
  11830   Tue Dec 1 10:52:52 2015 SteveUpdateGeneralDataviewer

Dataviewer x axis end is not there.

On ( 2600 days) longer plots it is missing 8 moths and on (100 days) shorther plot it is missing 1 month.

Attachment 1: xAxisEndMissing.png
xAxisEndMissing.png
  11832   Tue Dec 1 16:55:04 2015 SteveUpdateVACDataviewer fixed

Q adjusted the Dataviewer so it is not chopping of data any more. Thanks.

 

Cold cathode gauge reading of 10 years.

 

Attachment 1: 10yrsCC1&4M.png
10yrsCC1&4M.png
  11858   Mon Dec 7 11:17:51 2015 SteveUpdateVACnoisy RGA scan at day 433

 

Quote:

CC1 and CC2 are working again. Why did they start working  again ?

 

 

Attachment 1: 433dRGAscan.png
433dRGAscan.png
  11863   Tue Dec 8 15:40:48 2015 SteveUpdateVACglitchy RGA scan at day 434

The noise floor of the Rga scan is glitching less today

 

Attachment 1: lessGlichingToday.png
lessGlichingToday.png
  11866   Wed Dec 9 11:25:55 2015 SteveUpdateVACnormal RGA scan at day 435-436

Glitches are gone. Rga scan is good

 

Attachment 1: glichesGone.png
glichesGone.png
Attachment 2: d436.png
d436.png
  11878   Mon Dec 14 14:08:49 2015 SteveUpdateSUSRuby wire standoffs update

Two companies are willing to  make the ruby grooves and the third one is still working on their quote.

The price is ~$100 each. The cost goes down 10% if we  order 50 instead of 30 pieces.

How many should we get ?

  11885   Wed Dec 16 10:22:14 2015 SteveUpdateIOOthis morning

c1sus and c1ioo were restarted. PMC locked.
 

Attachment 1: PMClocked.png
PMClocked.png
  11895   Mon Dec 21 14:31:41 2015 SteveUpdatePEMRat traps set

Two mechanical and two sticdky traps were set to catch univited visitor.

Absolutely no food or food remains into inside garbage cans!!!!!!!!!!!!!!!!!!!!!!!!!

Quote:

A small rat / large mouse just ran through the control room. Ugh.

 

Attachment 1: ratsNC.jpg
ratsNC.jpg
  11897   Tue Dec 22 16:39:42 2015 SteveUpdateendtable upgradeETMY optical table enclosure

I think there should be a scientifically based aveluation of the ETMY enclosure so we can make the ETMX better.

Meanwhile I'm counting pieces to move on with the south end table cover.

 

Attachment 1: IMG_0028.JPG
IMG_0028.JPG
Attachment 2: IMG_0027.JPG
IMG_0027.JPG
Attachment 3: ETMY-ISCT_EISOL.jpg
ETMY-ISCT_EISOL.jpg
  11902   Sat Dec 26 10:34:43 2015 SteveUpdateGeneraltoday

PMC locked manually and PRM sus damping restored.

Attachment 1: 1d.png
1d.png
  11903   Mon Dec 28 14:12:23 2015 SteveUpdateSUS4.2M EQ

Suspensions are recovered after 4.2 Mag earth quake. No obvoius sign of damage.

 

Attachment 1: 4.2Meq.png
4.2Meq.png
Attachment 2: recovered4.2M.png
recovered4.2M.png
  11904   Wed Dec 30 11:09:52 2015 SteveUpdateSUS4.4M EQ

Suspensions recovered after 4.4 Mag EQ

 

Attachment 1: 4.4MeqDevore.png
4.4MeqDevore.png
Attachment 2: free.png
free.png
  11909   Tue Jan 5 09:48:52 2016 SteveUpdatePEMRat trap moved

Our janitor confirmed that Q was not hallucinating about this animal. The dropping size indicating a good size one in the IFO room.

One of the mechanical traps moved from the control room to the east arm, close to the " machine shop " door.

I'm going to get more traps.

Quote:

Two mechanical and two sticdky traps were set to catch univited visitor.

Absolutely no food or food remains into inside garbage cans!!!!!!!!!!!!!!!!!!!!!!!!!

Quote:

A small rat / large mouse just ran through the control room. Ugh.

 

 

  11911   Tue Jan 5 15:48:16 2016 SteveUpdatesafetyRat trap locations

Please look around when working close to these five locations. Use flashlights or leave lights on.

These mechanial traps are HAZARDOUS !

No visitors or tours till Monday, Jan 11  2016

Attachment 1: Control_Room.jpg
Control_Room.jpg
Attachment 2: EarmCESdoor.jpg
EarmCESdoor.jpg
Attachment 3: 1Y1.jpg
1Y1.jpg
Attachment 4: MC2.jpg
MC2.jpg
Attachment 5: XarmMaglev.jpg
XarmMaglev.jpg
  11914   Wed Jan 6 08:09:04 2016 SteveUpdatePEM4.5 Mag Banning EQ

IFO restored after 4.5 Mag Banning, Ca earthquake.

Attachment 1: 4.5Mag__Banning.png
4.5Mag__Banning.png
  11915   Wed Jan 6 10:58:03 2016 SteveUpdateGeneral projector light bulb is out

Projector light bulb ordered

Quote:

 

[ Manasa, Ericq and Steve ]

 Vivitek D952HD with 186 hours installed.

 

  11927   Tue Jan 12 07:54:23 2016 SteveUpdateSUSETMX damping restored

PMC locked and ETMX suspension damping restored.

  11928   Tue Jan 12 08:40:06 2016 SteveUpdatePEMAir cond maintenance

Air condition maintenance is happening. It should be done by 10am

  11932   Thu Jan 14 13:44:05 2016 SteveUpdateSUS earthquake 3.6M

No obvious sign of damage.

 

Attachment 1: 3.6M_JohannesburgCA.png
3.6M_JohannesburgCA.png
Attachment 2: ETMX_3.6_M.png
ETMX_3.6_M.png
  11935   Tue Jan 19 10:25:53 2016 SteveUpdateSUSEQ 3.6M Ludlow

Just an other local earthquake 3.6 Mag Ludlow, Ca

No obvious sign of damage

 

Attachment 1: EQ_3.6M_Ludlow.png
EQ_3.6M_Ludlow.png
  11939   Wed Jan 20 09:36:11 2016 SteveUpdateSUSETMX damping restored

ETMX suspension damping restored.

 

Attachment 1: EQ.png
EQ.png
  11948   Mon Jan 25 08:36:46 2016 SteveUpdateSUSPRM damping restored

PRM suspension damping restored after 4.1 Mag Ludlow earthquake.

 

Attachment 1: EQ4.1mLudlow.png
EQ4.1mLudlow.png
Attachment 2: EQ7.1mAlaska_4.1mLudlow.png
EQ7.1mAlaska_4.1mLudlow.png
Attachment 3: 7.1_4.1.png
7.1_4.1.png
  11949   Mon Jan 25 11:06:08 2016 SteveUpdatePEMnoisy fan belt replaced

The noisy fan belt on the roof of the control room was finally replaced on Friday, Jan 22 2016

Quote:

Air condition maintenance is happening. It should be done by 10am

 

ELOG V3.1.3-