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ID Date Author Type Category Subjectdown
  8431   Tue Apr 9 14:55:13 2013 JamieUpdateCDSoverbooked test points cause of DAQ problems

Folks were complaining that they were getting zeros whenever they tried to open fast channels in DTT or Dataviewer.  It turned out that the problem was that all available test points were in use in the c1lsc model:

lsc-gds.png

There is a limit to how many test points can be open to a single model (in point of fact I think the limit is on the data rate from the model to the frame builder, not the actual number of open test points).  In any event, they was all used up.  The grid at the bottom right of the C1LSC GDS screen was all full of non-zeros, and the FE TRATE number was red, indicating that the data rate from this model had surpassed threshold.

The result of this overbooking is that any new test points just get zeros.  This is a pretty dumb failure mode (ideally one would not be able to request the TP at all with an appropriate error message), but it is what it is.  This usually means that there are too many dtt/dataviewers left with open connections.

We tried killing all the open processes that we could find that might be holding open test points, but that didn't seem to clear them up.  Stuck open test points is another known problem.  Referencing the solution in #6968 I opened the diag shell and killed all test points everywhere:

controls@pianosa:~ 0$ diag -l -z
Set new test FFT
NDS version = 12
supported capabilities: testing  testpoints  awg  
diag> tp clear * *
test point cleared
diag> quit
EXIT KERNEL
controls@pianosa:~ 0$
  14002   Fri Jun 22 00:06:13 2018 shrutiUpdateGeneralover-head fluorescent lights down

Two out of the four over-head fluorescent lights in the X end of the interferometer were flickering today.

  9028   Mon Aug 19 10:16:15 2013 PicassoMetaphysicsTreasureoutsider art

 ranasglory.png

  2633   Tue Feb 23 16:20:44 2010 steveConfigurationVACoutgassing + leak

Quote:

As preparation for the upcoming planned power outage we turned turbos, RGA off and closed valves.

IFO chamber is not pumped now. Small leaks and out gassing will push the pressure up slowly. At 3 mTorr of P1 the PSL output shutter

will be closed by the interlock.

It is OK to use light in the IFO up to this point.

 Our vacuum was not pumped for 4 days. The computers were not up when we started pumping again. The manual reading on P1 was 15 mTorr.

This means that our outgassing plus leakrate is  ~3.8 mTorr /day 

3-5 mTorr / day is normal

Attachment 1: outgleak.jpg
outgleak.jpg
  6856   Fri Jun 22 19:52:47 2012 JamieUpdateComputersottavia reconfigured as CDS workstation

ottavia has been reinstalled with Ubuntu 10.04 LTS, and has been configured as a CDS workstation.

I have been maintaining a script that takes a stock 10.04 install and configures it as a workstation.  I've attached it here, but it lives at:

/users/controls/workstation-setup.sh

The script is designed to be idempotent, i.e. it can be run on a machine that has already been configured and it will either have no affect or update.

Attachment 1: workstation-setup.sh
#!/bin/bash

# This is a CDS workstation setup script for Ubuntu 10.04 It is
# idempotent, so running it on an already configured workstation is
# fine.

########################################
### controls

if [[ $(id -u controls) != 1001 ]] ; then
... 111 more lines ...
  1071   Thu Oct 23 11:26:25 2008 steveBureaucracyVACoptosigma forks for vacuum
Nine short forks from OptoSigma were cleaned, baked and measured by Bob T.
They passed the LIGO vac compatiblity test as Rana predicted.
Remember: Thorlab and Newfocus forks failed this qualification process.
  5260   Thu Aug 18 00:58:40 2011 jamieUpdateSUSoptics kicked and left free swinging

ALL optics (including MC) were kicked and left free swinging at:

997689421

The "opticshutdown" script was also run, which should turn the watchdogs back on in 5 hours (at 6am).

 

  6190   Thu Jan 12 10:11:59 2012 steveUpdatePEMoptical table top with 1" wall

Quote:

3/4 " thick colored acrylic material will be used in this air tight design. Surgical tubing for o-ring. We may have to put an o-ring into the bottom to have it really air tight.

Feedtrouhs: www.roxtec.com

The top drawing is not ready. It will have handle and industrial grade L-handle lock pin to hold cover down. There will be 2  one inch od post in the midle of the table to hold the cover and lock  the ball pin.

I'm waiting for your inputs, so I can send this preliminary design out for quote.

 

 The present plan to go with clear cast acrylic plexiglass 1" thick side wall  and  two  clear  1/2 thick top cover.

The inside would be lined with light braun YAG safety window sheets 0.14"  VLT ~25%  OD 4 @ 532nm & OD 5 @ 1064nm

 

Attachment 1: 101122012atc.PDF
101122012atc.PDF
  6139   Tue Dec 20 15:49:21 2011 steveUpdatePEMoptical table top

3/4 " thick colored acrylic material will be used in this air tight design. Surgical tubing for o-ring. We may have to put an o-ring into the bottom to have it really air tight.

Feedtrouhs: www.roxtec.com

The top drawing is not ready. It will have handle and industrial grade L-handle lock pin to hold cover down. There will be 2  one inch od post in the midle of the table to hold the cover and lock  the ball pin.

I'm waiting for your inputs, so I can send this preliminary design out for quote.

 

Attachment 1: 05150901.PDF
05150901.PDF
  10071   Thu Jun 19 14:12:45 2014 steveUpdatesafetyoptical table scans

 

 PSL, AP, ETMY and ETMX optical tables were scanned for stay beam.

  9941   Mon May 12 14:42:25 2014 steveUpdateendtable upgradeoptical table enclosure wall proposal and table at ETMY

Quote:

 Sanwiched wall as shown: 1" clear acrylic, 2 layers of 0.004" thick "window tint", 1 layer of  0.007" thermashield  and  0.125" yellow acrylic

Visibility: 70 %,    Transmission of 1064 nm  2-3 % at 0-50 degrees incident,   power density  ~ 0.7 W/mm2

Max power 100 mW

        

More details about this east end  " acrylic + "   enclosure ( optical table cover ) can be found elog entry 6210, 7194 and  7106

 

Window tinted layer transmission plot is below.

 

We have a film which may meet your requirements and the values are shown below:

         

               Wavelength (nm)              Transmission                     Reflectance(front)            Reflectance (back)

 

                        1060                               .0772                               .604                                     .759

 

                        1070                               .0723                               .615                                     .772

 

These values are taken from the LBNL Optics 6 program and if you have access to that program, the NFRC ID for the film is 202.   If you do not have access to the program, I have a captured the graph which may be of some help.  I apologize for the appearance of the graph but someone at LBNL decided it would look better with a dark gray background – the yellow is the transmission curve, the blue is the reflectance (front) and the green is the reflectance (back).

 

 

The film is referred to as “Hilite 70” and has a 72% visible light transmission.  These results were obtained with the film mounted on 1/8” clear glass.

 

I

 

 

 

 

 

Saint-Gobain Performance Plastics

www.solargard.com

 

Please consider your environmental responsibility before printing this email.

 

 

 

Attachment 1: Hilite70.jpg
Hilite70.jpg
Attachment 2: ETMY-ISCT.jpg
ETMY-ISCT.jpg
Attachment 3: RoscoThermashield.pdf
RoscoThermashield.pdf
  4701   Thu May 12 09:00:23 2011 steveUpdateGeneraloptical table covers must be used

I found ITMX-ISCT and BS-ISCT ( IFO sensing-control table)  not covered this morning. Please do not leave tables open.

  7106   Tue Aug 7 16:11:23 2012 steveUpdateSUSoptical table box wall proposal

 Sanwiched wall as shown: 1" clear acrylic, 2 layers of 0.004" thick "window tint", 1 layer of  0.007" thermashield and  0.125" yellow acrylic

Visibility: 70 %,    Transmission of 1064 nm  2-3 % at 0-50 degrees incident  power density 0.7 W/mm2

Max power 100 mW

        

Attachment 1: IMG_1479.JPG
IMG_1479.JPG
Attachment 2: IMG_1478.JPG
IMG_1478.JPG
  7107   Tue Aug 7 16:21:16 2012 ranaUpdateSUSoptical table box wall proposal

Quote:

 Sanwiched wall as shown: 1" clear acrylic, 2 layers of 0.004" thick "window tint", 1 layer of  0.007" thermashield and  0.125" yellow acrylic

Visibility: 70 %,    Transmission of 1064 nm  2-3 % at 0-50 degrees incident  power density 0.7 W/mm2

Max power 100 mW        

 Good. The power density and max power are not important (especially since you don't define a quantitative way to spec them). We ONLY care about the transmission.

  1377   Mon Mar 9 17:11:38 2009 AlbertoConfigurationoplevsoptical levers centering

Yoichi, Alberto

this afternoon we centered the optical levers for all the optics.

To do that we first ran the alignment scripts for all the cavities.

  9156   Tue Sep 24 20:43:45 2013 masayukiSummarySUSoptical levers centering

I centered optical levers of ITMX,BS,ETMY. I also change the position of optical levers of ITMX, ETMY, ITMY, BS on Friday night(9/21), of ITMX, ETMY, BS on Monday night. Both are around 6:00 ~ 7:00.But centering on Monday was totally wrong, because I centered with not good IFO alignment.

The attachment is the 5 days trend of the opt lev of ITMX. First gap is alignment on Friday and Second gap is the alignment on Monday. Now I centered after  locking the FPMI.

The attachment 2 is the last 6 hours data.  The gap on 9/25 00:00 and 1:30(UTC)  is because the alignment of the cavity and the last gap is because of  centering of the optical lever.

Attachment 1: Screenshot-Untitled_Window.png
Screenshot-Untitled_Window.png
Attachment 2: Screenshot-Untitled_Window-1.png
Screenshot-Untitled_Window-1.png
  1020   Thu Oct 2 16:44:28 2008 steveSummaryoplevsoptical levers
The idea is to push the UGF to 10 Hz of the TM oplev servos with quiet HeNe laser.
We measured good intensity noise of JDS 1103P in May 2007 and converted most of the TM oplevs to it.
The ITMs still have the noisy 670nm , 1 mW, diode lasers to begin with.
In order to get 1 mW power returning to the qpds I measured the power going to TMs
and returning on qpds ...so we can select the appropriate laser power for the conversion.

40m optical lever lasers:

HeNe laser JDS 1103P, 633nm, linear polarization 500:1,

ETMX: qpd 0.12 mw (4%) reflected of 3 mW,
ETMY: qpd 0.1o (3.8%) " 2.6
BS: qpd 0.02 ( 2.5%) " 0.8
PRM: qpd 0.01 (1.3%) " 0.75
SRM: qpd 0.08 (10%) " 0.8

Coherent 670 nm Diode Lasers VLM-tm, 0.95 mW, linear polarization 100:1,

ITMX: qpd 0.1 mW (11%) reflected back from TM of 0.9 mW
ITMY: qpd 0.04 (7%) " " 0.6

It seems that JDS HeNe laser 633 nm, linear polarization 500:1, 10 mW will do the job
  4727   Mon May 16 15:46:05 2011 KojiUpdateGeneraloptical layout viewable on the online version of autocad

I have made my own AutoCAD WS account and put the latest 40m layout.
AutoCAD WS is a free cloud service which enable us to browse/edit the DWG files.

You can view/play/print it from the following link even without making the account.

https://www.autocadws.com/main/publish?link=RVFmNEtOd3EzNVFtRXcx

If you make your account you can actually save it although the editing capability is somewhat limited.

Notes:
- It needs the Flash plug-in and Internet connection.
- I think Safari is the most stable platform on Mac. (i.e. I had some malfunctions with Firefox and Chrome)

  2957   Thu May 20 12:34:46 2010 kiwamuConfiguration40m Upgradingoptical breadboards with legs

Yesterday Steve and I revived two legs to mount some optical breadboards outside of the end table.

These legs had been used as oplev's mounts many years ago, but now they are served for 40m upgrading. These are really nice.

By putting them on the side of the end table, a mirror mounted on the top of the leg can reflect the beam outside of the end table.

Once we pick off the green beam from the end table to its outside, the green beam can propagate through the 40m walkway along the Y-arm.

So that we can measure the beam profile as it propagates.

These legs are also going to be used during mode matching of the vacuum optics.

Attachment 1: leg1_small.png
leg1_small.png
Attachment 2: leg2_small.png
leg2_small.png
  6135   Sun Dec 18 23:00:22 2011 kiwamuUpdateSUSoplve recenterd

I have recentered the oplev beams, including BS, ITMs and ETMs.

  5261   Thu Aug 18 10:17:04 2011 kiwamu, steveUpdateSUSoplevs reestablished at Vertex

Kiwamu and Steve, from yesterday

PRM and BS oplev paths were relaid after setting 1/2 OSEM voltages. The incident beam on suspended optics are centered  within  ~ +- 2 mm

I noticed many unvected ss screws are used on the big Al table tops. The SS 1/4-20 screws

 used on the optical tables in vacuum MUST be VENTED!

Also, please use  SS clamps. Replace aluminum ones when you can. We have plenty baked ones.

 

 

  11224   Thu Apr 16 10:32:42 2015 SteveUpdateOptical Leversoplevs monitoring

The IFO_overview of oplevs seems ok, The servos are working fine. The green arms are locked, but master and oplev_summary monitoring screens are not.

I'm proposing to Erick G. to postpone the oplev noise measurement.

Attachment 1: oplevCond.png
oplevCond.png
  7242   Tue Aug 21 09:14:01 2012 SteveUpdateSUSoplevs centered

Oplevs centered in flashing condition, except PRM and SRM.  IP POS centered also,

I like this new summing screen of Jenne.

Attachment 1: OPLcentered.png
OPLcentered.png
  1644   Tue Jun 2 23:55:45 2009 AlbertoUpdateoplevsoplevs centerd

Tonight I centered the oplevs for ITMX/Y, SRM, PRM, BS.

After doing that I noticed that the BS drifted a little from where I had set it.

  7798   Fri Dec 7 19:24:43 2012 Den, AyakaUpdateSUSoplevs as acoustic and seismic noise couplers at high frequencies

We've provided acoustic excitation using speakers on the AS table and saw that PSD of YARM feedback signal increased in the frequency range 50 - 100 Hz. Meanwhile, XARM feedback signal did not change. Moreover, YARM noise is much higher at these frequencies compared to XARM.

The problem was with YARM oplev servos. Both ITMY and ETMY produced noise to YARM length. ITMY oplev signal had a huge resonance at 55 Hz. We measured coherence with accelerometers, it was 0.8. It turned out that one of the mirror mounts was not fixed in the oplev path. When we fixed it, noise has gone.

Note: speakers were on AS table but mirror mounts could steel feel it on ITMY table.

IMG_0111.JPG         YARM.png

Then we had a look on ETMY table. We saw a mirror on suspiciously long mirror mount that was used in the ETMY oplev path. We slightly kicked long mount with a small screwdriver and YARM control signal went up with resonance at 100 Hz.

IMG_0112.JPG        ETMY_olreso_copy.png

  7799   Fri Dec 7 20:34:31 2012 AyakaUpdateSUSoplevs as acoustic and seismic noise couplers at high frequencies

I will just leave the picture of spectrum that shows the injected acoustic sound effects due to the oplevs.

 YARM_acous_oplev.pdf

red line: POY error without oplev feedback nor acoustic noise
blue line: POY error without oplev feedback but with acoustic noise
brown line: POY error with oplev feedback but without acoustic noise
green line: POY error with oplev and acoustic noise

You can see there is noise only at green line around 70 - 100 Hz. And it does not look like the acoustic signal is injected directly to the arms but the acoustic sound couples to the original noise source.

  5082   Mon Aug 1 16:06:05 2011 steveUpdateSUSoplevs are centered

Kiwamu, Koji and Steve,

Arm aligned separatly and oplev qpds were centered  including BS. Than we realigned manually DRM and centered their qpds.

ALL SUS oplevs were centered to resonating cavities.

  6257   Mon Feb 6 17:06:11 2012 steveUpdateSUSoplev transferfunction of PIT: ETMY & ETMX

Kiwamu showed me how to do transferfunction of oplev pitch

Attachment 1: ETMX_PIT.png
ETMX_PIT.png
Attachment 2: ETMY_PIT.png
ETMY_PIT.png
  6320   Sat Feb 25 00:37:42 2012 kiwamuUpdateSUSoplev spectra during PRMI lock

Somehow the angular stability of the central part have not been so great.

Also the angular motions look fluctuating a lot and they seem to be related with the glitches.

I took the oplev spectra when the PRMI is locked and unlocked to see whether if something obviously crazy is going on or not.

They seem ok to me except that the PRM pitch shows an extra bump at around 2-3 Hz when the PRMI is locked. But I don't think it's prominent.

 


- The attached files show the oplev spectra. When the PRMI is locked the PRM and both ITMs are under the length control.

(red) pitch when PRMI is locked

(blue) yaw when PRMI is locked

(orange) pitch without any length controls

(cyan) pitch without any length controls

 

Attachment 1: oplev_PRMI.pdf
oplev_PRMI.pdf oplev_PRMI.pdf oplev_PRMI.pdf oplev_PRMI.pdf
  4731   Tue May 17 16:53:22 2011 kiwamuUpdateSUSoplev sign was wrong on ETMY

Last night I found that the sign of the oplev control of PITCH on ETMY was wrong. I flipped it to the correct sign.

We've been locking the Y arm by feeding a signal back to ITMY  because pushing ETMY somehow made the lock unstable in the angular motion.

After the correction of the oplev contol sign, I was able to keep the lock robustly by pushing ETMY.

  1612   Wed May 20 09:55:18 2009 steveUpdatePEMoplev servos turned off

All oplevs servos turned off to protect our suspentions from vibration due to drilling and pounding in CES high bay area.

This activity will be done from 10 am till 3 pm today.

 

Meanwhile our IFO-air conditions are turned off for maintenance.

Their performance of 6 months is shown on plot.

Attachment 1: ACpart6m.jpg
ACpart6m.jpg
  6964   Wed Jul 11 16:19:08 2012 yutaUpdateSUSoplev servo phiology

I heard that Steve did great work on oplev in Feb 2012.
Here's summary what happened to oplev since then.
Someone changed oplev filters and gain. I couldn't find elog about it. Does anyone know?

Quadrant sum:
  Quadrant sum (C1:SUS-XXX_OLSUM) for each optic now and in Feb 2012 is

  ITMX   ITMY   ETMX   ETMY     BS    PRM    SRM
  2456  14630   1476  14885   3650   4302   2937   counts (now)
  1300  14500    900   9000   3500   4000   2600   counts (Feb 6, 2012 elog
#6256)
 0.025  0.3    0.2    0.2    0.05   0.06   0.04    mW on QPD (Feb 6, 2012 elog
#6256)
  1350  15000   1500  15500   3500   4000   2600   counts (Feb 23, 2012 elog
#6744)

  ETMX oplev laser was replaced on May 22, 2012, and quadrant sum was 20500 counts at that time (elog #6656).


Oplev servo openloop transfer functions:
  In Feb 2012, gains were adjusted and filter settings are recorded by Steve.
  For all pitch OLTF, see elog #6309.
  For all yaw OLTF, see elog #6323.

  All the filters in Feb is listed in elog #6744.
  Filters now are messed up, as Jamie pointed out in elog #6743.
  Below is the current filter settings.

  I turned ELP and RLP filters on, which wasn't on to cut-off noises at higher frequencies.
  I left resonant gains of ETMs because I don't know what they are for.
  I put ELP35 for ITMs, BS, PRM and SRM. I put RLP80 for BS, PRM and SRM.
  I will leave ELP35 off for BS and SRM because they oscillate currently. ELP50 and ELP40 is on for a substitution. I will readjust them soon.

  I don't know who changed all gains (except for PRM, which I adjusted in elog #6952). It doen't look like it is because of change in quadrant sum.
  I also don't know who deleted 3.3 Hz resonant gain for BS.

  I put all similar filters in same place to make it organized. Now, basic fitlers are organized. We may need some resonant gains for each optics.

OPLEV SERVO 300^2:0 BR ELP RLP RES GAIN QPD counts
filter position FM1 FM5 FM9 FM4 FM3, FM4    
ETMY pit 300^2:0 BR 35 80

0.5 (off)

-0.2 (was -1.5) 14,900
ETMY yaw 300^2:0 BR 35 80 0.6 (off) -0.2 (was -1.0)  
ETMX pit 300^2:0 BR 35 80 0.5 (off) 0.5 1,500
ETMX yaw 300^2:0 BR 35 80 0.6 (off) 0.6 (was 1.0)  
ITMY pit 300^2:0 BR 35 80   2.1 (was 2.0) 14,600
ITMY yaw 300^2:0 BR 35 80   -2.0 (was -4.0)  
ITMX pit 300^2:0 BR 35 80   2.6 (was 1.0) 2,500
ITMX yaw 300^2:0 BR 35 80   -1.6 (was-2.0)  
BS pit 300^2:0 BR 50 (FM10) 80   0.6 (was 0.5) 3,700
BS yaw 300^2:0 BR 50 (FM10) 80 (3.3 is some how deleted) -0.6 (was -1.0)  
PRM pit 300^2:0 BR 35 80 3.3 (off) 0.15 (was 1.0) 4,300
PRM yaw 300^2:0 BR 35 80 3.3 (off),  4 (off) -0.2 (was 0.5)  
SRM pit 300^2:0 BR 40 (FM10) 80   -2.0 2,900
SRM yaw 300^2:0 BR 40 (FM10) 80   2.0  

  I also found Kiwamu's angular motion measurement during PRMI lock (elog #6320). They look different with my measurement yesterday (elog #6954).

  6370   Wed Mar 7 11:20:23 2012 steveUpdateSUSoplev qpd offsets zeroed

All oplev qpd quadrons were zeroed by offset  in blocked dark condition.

  10362   Mon Aug 11 10:23:39 2014 steveSummarySUSoplev laser summary updated

Quote:

 

                  2005              ALL oplev servos use Coherent DIODE LASERS # 31-0425-000, 670 nm, 1 mW

    Sep. 28, 2006              optical lever noise budget with DC readout in 40m,  LIGO- T060234-00-R, Reinecke & Rana

    May  22, 2007              BS, SRM & PRM  He Ne 1103P takes over from diode

    May  29, 2007              low RIN He Ne JDSU 1103P selected, 5 purchased sn: T8078254, T8078256, T8078257, T8078258 & T8077178 in Sep. 2007

    Nov  30, 2007               Uniphase 1103P divergence measured

    Nov. 30, 2007               ETMX old Uniphase 1103P  from 2002 dies: .............., running time not known......~3-5 years?

    May 19, 2008               ETMY old Uniphase 1103P from 1999 dies;.....................running time not known.....~    ?

    Oct.  2, 2008                ITMX & ITMY are still diodes, meaning others are converted to 1103P earlier

 

                     JDSU 1103P were replaced as follows:

   May 11, 2011                ETMX replaced, life time 1,258 days  or 3.4 years

   May 13, 2014               ETMX , LT 1,098 days or 3 y

   May 22, 2012               ETMY,  LT 1,464 days or  4 y

   Oct.  5, 2011                BS & PRM, LT 4 years,  laser in place at 1,037 days or 2.8 y

   Sep. 13, 2011               ITMY  old 1103P &    SRM    diode laser replaced by 1125P  ..........old He life time is not known, 1125P in place 1,059 days or 2.9 y

   June 26, 2013              ITMX 622 days or 1.7 y    note: we changed because of beam quality.........................laser in place 420 days or 1.2 y

 

  Sep. 27, 2013               purchased 3 JDSU 1103P lasers, sn: P893516, P893518, P893519 ......2 spares ( also 2 spares of 1125P of 5 mW & larger body )

 

      May  13, 2014             ETMX,  .............laser in place 90 d

      May  22, 2012             ETMY, 

     Oct.  7,  2013             ETMY,  LT  503 d  or  1.4 y............bad beam quality ?

     Aug. 8,  2014              ETMY,  .............laser in place   425 days  or  1.2 y

 

  10518   Thu Sep 18 10:08:07 2014 steveSummarySUSoplev laser summary updated

 

Quote:

 

Quote:

 

                  2005              ALL oplev servos use Coherent DIODE LASERS # 31-0425-000, 670 nm, 1 mW

    Sep. 28, 2006              optical lever noise budget with DC readout in 40m,  LIGO- T060234-00-R, Reinecke & Rana

    May  22, 2007              BS, SRM & PRM  He Ne 1103P takes over from diode

    May  29, 2007              low RIN He Ne JDSU 1103P selected, 5 purchased sn: T8078254, T8078256, T8078257, T8078258 & T8077178 in Sep. 2007

    Nov  30, 2007               Uniphase 1103P divergence measured

    Nov. 30, 2007               ETMX old Uniphase 1103P  from 2002 dies: .............., running time not known......~3-5 years?

    May 19, 2008               ETMY old Uniphase 1103P from 1999 dies;.....................running time not known.....~    ?

    Oct.  2, 2008                ITMX & ITMY are still diodes, meaning others are converted to 1103P earlier

 

                     JDSU 1103P were replaced as follows:

   May 11, 2011                ETMX replaced, life time 1,258 days  or 3.4 years

   May 13, 2014               ETMX , LT 1,098 days or 3 y

   May 22, 2012               ETMY,  LT 1,464 days or  4 y

   Oct.  5, 2011                BS & PRM, LT 4 years,  laser in place at 1,037 days or 2.8 y

   Sep. 13, 2011               ITMY  old 1103P &    SRM    diode laser replaced by 1125P  ..........old He life time is not known, 1125P in place 1,059 days or 2.9 y

   June 26, 2013              ITMX 622 days or 1.7 y    note: we changed because of beam quality.........................laser in place 420 days or 1.2 y

 

  Sep. 27, 2013               purchased 3 JDSU 1103P lasers, sn: P893516, P893518, P893519 ......2 spares ( also 2 spares of 1125P of 5 mW & larger body )

 

      May  13, 2014             ETMX,  .............laser in place 90 d

      May  22, 2012             ETMY, 

     Oct.  7,  2013             ETMY,  LT  503 d  or  1.4 y............bad beam quality ?

     Aug. 8,  2014              ETMY,  .............laser in place   425 days  or  1.2 y

 

      Sept. 5, 2014              new 1103P, sn P893516  installed at SP table for aLIGO oplev use qualification

     

  11148   Thu Mar 19 17:11:32 2015 steveSummarySUSoplev laser summary updated

           March  19, 2015   2  new  JDSU 1103P, sn P919645 & P919639 received from Thailand through Edmond Optics. Mfg date 12/2014............as spares

  12126   Mon May 23 15:51:32 2016 steveSummarySUSoplev laser summary updated

 

Quote:

 

Quote:

 

Quote:

 

                  2005              ALL oplev servos use Coherent DIODE LASERS # 31-0425-000, 670 nm, 1 mW

    Sep. 28, 2006              optical lever noise budget with DC readout in 40m,  LIGO- T060234-00-R, Reinecke & Rana

    May  22, 2007              BS, SRM & PRM  He Ne 1103P takes over from diode

    May  29, 2007              low RIN He Ne JDSU 1103P selected, 5 purchased sn: T8078254, T8078256, T8078257, T8078258 & T8077178 in Sep. 2007

    Nov  30, 2007               Uniphase 1103P divergence measured

    Nov. 30, 2007               ETMX old Uniphase 1103P  from 2002 dies: .............., running time not known......~3-5 years?

    May 19, 2008               ETMY old Uniphase 1103P from 1999 dies;.....................running time not known.....~    ?

    Oct.  2, 2008                ITMX & ITMY are still diodes, meaning others are converted to 1103P earlier

 

                     JDSU 1103P were replaced as follows:

   May 11, 2011                ETMX replaced, life time 1,258 days  or 3.4 years

   May 13, 2014               ETMX , LT 1,098 days or 3 y

   May 22, 2012               ETMY,  LT 1,464 days or  4 y

   Oct.  5, 2011                BS & PRM, LT 4 years,  laser in place at 1,037 days or 2.8 y

   Sep. 13, 2011               ITMY  old 1103P &    SRM    diode laser replaced by 1125P  ..........old He life time is not known, 1125P in place 1,059 days or 2.9 y

   June 26, 2013              ITMX 622 days or 1.7 y    note: we changed because of beam quality.........................laser in place 420 days or 1.2 y

 

  Sep. 27, 2013               purchased 3 JDSU 1103P lasers, sn: P893516, P893518, P893519 ......2 spares ( also 2 spares of 1125P of 5 mW & larger body )

 

      May  13, 2014             ETMX,  .............laser in place 90 d

      May  22, 2012             ETMY, 

     Oct.  7,  2013             ETMY,  LT  503 d  or  1.4 y............bad beam quality ?

     Aug. 8,  2014              ETMY,  .............laser in place   425 days  or  1.2 y

 

      Sept. 5, 2014              new 1103P, sn P893516  installed at SP table for aLIGO oplev use qualification

     

           May 23, 2016             ITMX dead laser sn P845648 replaced after 1062 days [2.9 yrs] by 1103P, sn P859884, with output output  2.6 mW, nicely round beam quality at 15 meters.

Attachment 1: oplSum.png
oplSum.png
  12341   Wed Jul 27 11:40:48 2016 steveSummarySUSoplev laser summary updated

 

Quote:

 

Quote:

 

Quote:

 

Quote:

 

                  2005              ALL oplev servos use Coherent DIODE LASERS # 31-0425-000, 670 nm, 1 mW

    Sep. 28, 2006              optical lever noise budget with DC readout in 40m,  LIGO- T060234-00-R, Reinecke & Rana

    May  22, 2007              BS, SRM & PRM  He Ne 1103P takes over from diode

    May  29, 2007              low RIN He Ne JDSU 1103P selected, 5 purchased sn: T8078254, T8078256, T8078257, T8078258 & T8077178 in Sep. 2007

    Nov  30, 2007               Uniphase 1103P divergence measured

    Nov. 30, 2007               ETMX old Uniphase 1103P  from 2002 dies: .............., running time not known......~3-5 years?

    May 19, 2008               ETMY old Uniphase 1103P from 1999 dies;.....................running time not known.....~    ?

    Oct.  2, 2008                ITMX & ITMY are still diodes, meaning others are converted to 1103P earlier

 

                     JDSU 1103P were replaced as follows:

   May 11, 2011                ETMX replaced, life time 1,258 days  or 3.4 years

   May 13, 2014               ETMX , LT 1,098 days or 3 y

   May 22, 2012               ETMY,  LT 1,464 days or  4 y

   Oct.  5, 2011                BS & PRM, LT 4 years,  laser in place at 1,037 days or 2.8 y

   Sep. 13, 2011               ITMY  old 1103P &    SRM    diode laser replaced by 1125P  ..........old He life time is not known, 1125P in place 1,059 days or 2.9 y

   June 26, 2013              ITMX 622 days or 1.7 y    note: we changed because of beam quality.........................laser in place 420 days or 1.2 y

 

  Sep. 27, 2013               purchased 3 JDSU 1103P lasers, sn: P893516, P893518, P893519 ......2 spares ( also 2 spares of 1125P of 5 mW & larger body )

 

      May  13, 2014             ETMX,  .............laser in place 90 d

      May  22, 2012             ETMY, 

     Oct.  7,  2013             ETMY,  LT  503 d  or  1.4 y............bad beam quality ?

     Aug. 8,  2014              ETMY,  .............laser in place   425 days  or  1.2 y

 

      Sept. 5, 2014              new 1103P, sn P893516  installed at SP table for aLIGO oplev use qualification

     

           May 23, 2016             ITMX dead laser sn P845648 replaced after 1062 days [2.9 yrs] by 1103P, sn P859884, with output output  2.6 mW, nicely round beam quality at 15 meters.

               July 27, 2016             2  new 1103P from Edmonds in: P947034 & P947039, manf. date April 2016,

  12753   Wed Jan 25 10:46:58 2017 steveSummarySUSoplev laser summary updated

                    Oct.  5, 2015              ETMY He/Ne replaced by 1103P, sr P919645,  made Dec 2014, after 2 years

                   Jan. 24, 2017              ETMY He/Ne replaced by 1103P,  sr P947049,  made Apr 2016,  after 477 hrs running hot

Attachment 1: oplev_sums.png
oplev_sums.png
  12892   Fri Mar 17 15:30:39 2017 SteveSummarySUSoplev laser summary updated

         March  17,  2017         ETMX laser replaced at LT 3y with 1103P, sn T8070866

Attachment 1: oplev_sums.png
oplev_sums.png
  12933   Mon Apr 10 09:58:35 2017 SteveSummarySUSoplev laser summary updated

 

Quote:

                    Oct.  5, 2015              ETMY He/Ne replaced by 1103P, sr P919645,  made Dec 2014, after 2 years

                   Jan. 24, 2017              ETMY He/Ne replaced by 1103P,  sr P947049,  made Apr 2016,  after 477 hrs running hot

    Jan. 26,  2017              RIN test stared with P947034, made Apr. 2016  

    Apr.  10,  2017              purchased two 1103P from Edmund:  sr P964438 & sr P964431, made 02/2017

   

  13126   Wed Jul 19 12:47:43 2017 SteveSummarySUSoplev laser summary updated

1103P, sn P893518 of  2013 vintage is dead at the sus  fiber demo

Quote:

 

Quote:

                    Oct.  5, 2015              ETMY He/Ne replaced by 1103P, sr P919645,  made Dec 2014, after 2 years

                   Jan. 24, 2017              ETMY He/Ne replaced by 1103P,  sr P947049,  made Apr 2016,  after 477 hrs running hot

    Jan. 26,  2017              RIN test stared with P947034, made Apr. 2016  

    Apr.  10,  2017              purchased two 1103P from Edmund:  sr P964438 & sr P964431, made 02/2017

   

     July  19,  2017             1103P, sn P964438 as new installed at the south end for the glass fiber illumination. Turn laser off when you are done.

  13128   Wed Jul 19 18:24:15 2017 ranaSummarySUSoplev laser summary updated

The $1000 HeNe should not be used for illuminating fibers.

You should purchase these (total price per laser less than $6):

  1. 10 red laser diodes for $2.39 total
  2. 3-5 Vdc adapters
  11792   Fri Nov 20 09:45:39 2015 steveSummarySUSoplev laser summary

 

Quote:

 

Quote:

 

      May  13, 2014             ETMX,  .............laser in place 90 d

      May  22, 2012             ETMY, 

     Oct.  7,  2013             ETMY,  LT  503 d  or  1.4 y............bad beam quality ?

     Aug. 8,  2014              ETMY,  .............laser in place   425 days  or  1.2 y

 

      Sept. 5, 2014              new 1103P, sn P893516  installed at SP table for aLIGO oplev use qualification

 

Attachment 1: oplev_summery.png
oplev_summery.png
  10350   Fri Aug 8 11:22:35 2014 steveSummarySUSoplev laser summary

 

                  2005              ALL oplev servos use Coherent DIODE LASERS # 31-0425-000, 670 nm, 1 mW

    Sep. 28, 2006              optical lever noise budget with DC readout in 40m,  LIGO- T060234-00-R, Reinecke & Rana

    May  22, 2007              BS, SRM & PRM  He Ne 1103P takes over from diode

    May  29, 2007              low RIN He Ne JDSU 1103P selected, 5 purchased sn: T8078254, T8078256, T8078257, T8078258 & T8077178 in Sep. 2007

    Nov  30, 2007               Uniphase 1103P divergence measured

    Nov. 30, 2007               ETMX old Uniphase 1103P  from 2002 dies: .............., running time not known......~3-5 years?

    May 19, 2008               ETMY old Uniphase 1103P from 1999 dies;.....................running time not known.....~    ?

    Oct.  2, 2008                ITMX & ITMY are still diodes, meaning others are converted to 1103P earlier

 

                     JDSU 1103P were replaced as follows:

   May 11, 2011                ETMX replaced, life time 1,258 days  or 3.4 years

   May 13, 2014               ETMX , LT 1,098 days or 3 y

   May 22, 2012               ETMY,  LT 1,464 days or  4 y

   Oct.  5, 2011                BS & PRM, LT 4 years,  laser in place at 1,037 days or 2.8 y

   Sep. 13, 2011               ITMY  old 1103P &    SRM    diode laser replaced by 1125P  ..........old He life time is not known, 1125P in place 1,059 days or 2.9 y

   June 26, 2013              ITMX 622 days or 1.7 y    note: we changed because of beam quality.........................laser in place 420 days or 1.2 y

 

  Sep. 27, 2013               purchased 3 JDSU 1103P lasers, sn: P893516, P893518, P893519 ......2 spares ( also 2 spares of 1125P of 5 mW & larger body )

 

  12932   Mon Apr 10 09:49:32 2017 SteveUpdateOptical Leversoplev laser RIN test planning

We are planning to test 3 identical 1103Ps RIN with  continous temp monitoring and control later.

Selected  temp sensor   Platinum RTD 1PT100KN1515CLA   or           RTD-830 

Temp controller  with analoge output 0-10Vdc, CNi854  and external dc pulse driven  relay

Temperature Measurement Comparison Chart
Criteria Thermocouple RTD Thermistor
Temp Range -267°C to 2316°C -240°C to 649°C -100°C to 500°C
Accuracy Good Best Good
Linearity Better Best Good
Sensitivity Good Better Best
Cost Best Good Better

Order placed 4-12-17 for sensor  RTD-830,  controller CNi8-5-4 and relay  SSRL240DC25 = ~$500.

Still need: fuse, fuse housing, on/off switch, female  AC receptical, chassy box and AC power cord.

 

  12934   Mon Apr 10 14:21:57 2017 ranaUpdateOptical Leversoplev laser RIN test planning

I'm suspicious of this temperature sensor comparison. Usually, what they mean by accuracy is not the same as what we mean. I would not buy these yet. How about we just use what Caryn used several years ago (elog search) ?

  PS  Steve LM34             

  12858   Wed Mar 1 08:28:04 2017 SteveUpdateOptical Leversoplev laser RIN

Gautam and Steve,

New JDSU 1103P HeNe oplev laser RIN was measured on the SP table with cover on.

This is the beginning of an effort to improve oplev laser noise.

 

Attachment 1: RIN_1103P.png
RIN_1103P.png
Attachment 2: RIN_HeNe.png
RIN_HeNe.png
  12863   Thu Mar 2 13:59:04 2017 SteveUpdateOptical Leversoplev laser RIN

The laser got much better at low frequency as it warmed up. This laser is almost as good as the electronics?

Dark noise cal was the same today as it was 2 days ago.

 

Attachment 1: 1103P@2d.png
1103P@2d.png
  12864   Thu Mar 2 17:58:45 2017 ranaUpdateOptical Leversoplev laser RIN

This measurement looks bogus - the difference between dark and not dark is not significant enough to believe. Need to figure out how to match better into the ADC range.

ELOG V3.1.3-