ID |
Date |
Author |
Type |
Category |
Subject |
12705
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Thu Jan 12 10:14:49 2017 |
Steve | HowTo | safety | closing 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
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Attachment 2: howtocloseadoor.jpg
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12707
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Thu Jan 12 13:45:58 2017 |
Steve | HowTo | safety | closing 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.
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12711
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Fri Jan 13 10:53:03 2017 |
Steve | Update | PEM | doors 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
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Fri Jan 13 14:18:28 2017 |
Steve | Update | PEM | air 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
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12737
|
Thu Jan 19 08:25:12 2017 |
Steve | Update | SUS | MC1 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.
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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.

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No change. |
Attachment 1: MC1_MC3_ITMY_ETMX_sensors.png
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Attachment 2: sensors_UL.png
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12743
|
Fri Jan 20 14:42:12 2017 |
Steve | Update | PEM | Caltech weather station |
We should be able to connect to this station |
12744
|
Fri Jan 20 17:12:37 2017 |
Steve | Update | PEM | EM172 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
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Attachment 1: EM172c.jpg
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12745
|
Mon Jan 23 10:24:01 2017 |
Steve | Update | SUS | MC1 SUS electronics investigation |
Two day plot of glitching suspentions: MC3, ITMY and ETMX |
Attachment 1: 3glitchingSUS.png
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12747
|
Mon Jan 23 17:24:26 2017 |
Steve | Update | Optical Levers | ETMY 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.
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Attachment 1: ETMY_oplev__lasers.png
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12760
|
Fri Jan 27 14:50:04 2017 |
Steve | Update | SUS | 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 |
Steve | Update | General | 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.
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12802
|
Mon Feb 6 10:05:28 2017 |
Steve | Update | SUS | clamped cables |
The bottom 5 cable connections from Sat-Amp to Whittering Filter at 1X5 were clamped today. |
Attachment 1: clamped.jpg
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12808
|
Tue Feb 7 16:23:49 2017 |
Steve | Update | General | power 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 |
Steve | Update | General | 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
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12843
|
Tue Feb 21 17:05:14 2017 |
Steve | Update | General | Projector lamp replaced |
This bulb was blown out on Feb 4, 2017 after 2 months of operation.
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Attachment 1: blownup.jpg
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12848
|
Thu Feb 23 14:50:26 2017 |
Steve | Update | General | 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
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12853
|
Mon Feb 27 15:33:10 2017 |
Steve | Update | VAC | RGA scan at day 130 |
Valve configuration: vacuum normal
Vacuum envelope: 23.5 C
RGA head: 46.6 C
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Attachment 1: rgascan@130d.png
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12858
|
Wed Mar 1 08:28:04 2017 |
Steve | Update | Optical Levers | oplev 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.
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Attachment 1: RIN_1103P.png
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Attachment 2: RIN_HeNe.png
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12860
|
Wed Mar 1 17:25:28 2017 |
Steve | Update | LSC | MCREFL condition pictures |
Gautam and Steve,
Our MCREFL rfpd C30642GH 2x2mm beeing investigated for burned spots.
Atm1, unused - brand new pd
Atm2,3,4 MCREFL in place was not moved
More pictures will be posted on 40m Picassa site later.
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Attachment 1: IMG_3646.JPG
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Attachment 2: mcRefl_1.jpg
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Attachment 3: mcRefl_3.jpg
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Attachment 4: mcRefl_5.jpg
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12863
|
Thu Mar 2 13:59:04 2017 |
Steve | Update | Optical Levers | oplev 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.
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Attachment 1: 1103P@2d.png
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12866
|
Fri Mar 3 17:24:21 2017 |
Steve | Update | Optical Levers | oplev laser RIN |
Corrected oplev laser RIN plot at day 3
RXA:
- to measure RIN, the lever arm should be really short, not long.
- the beam should be 3x smaller than the active area of the diode
- the specular beam should be dumped on a razor dump.
- we need to make a summary page for HeNe laser testing so that we can see 24 hour specgrams of these things for ~3-4 lasers at the same time.
- We should add specgram stuff for the existing HeNe SUM channels on the active OLs.
GV: The channel the PD Steve is using is hooked up to C1:ALS-FC_X_F_IN. As I found out today, there can be considerable RF pickup between the C1:ALS-FC_X_F_IN and C1:ALS-FC_Y_F_IN channels, which share a common 4-pin LEMO cable - this is because the rise time of the square wave output of the Wenzel dividers is <1us, so suitability of this particular channel for the RIN measurement set up has to be reconsidered. Perhaps we can use one of the six spare PEM channels over at 1X6. |
Attachment 1: 3march17.pdf
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12868
|
Mon Mar 6 09:12:59 2017 |
Steve | Update | safety | crane inspection 2017 |
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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Attachment 1: inspection_2017.jpg
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12871
|
Mon Mar 6 16:32:36 2017 |
Steve | Update | General | old NPRO |
16 years old Lightwave NPRO M126-1064-700, sn 415 power output is tripping continously to zero.
The Lightwave Controller 125/126-OPN-POS sn516 was used in this test. Settings were lowered to close to nominal values without any success.
One can not determine what is broken: head or controller. This NPRO head was under Manasa's desk.
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12872
|
Tue Mar 7 15:17:19 2017 |
Steve | Bureaucracy | General | property tag |
Property tag found. |
Attachment 1: property_tag.jpg
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12873
|
Wed Mar 8 15:28:37 2017 |
Steve | Update | Optical Levers | oplev laser RIN |
Gautam and Steve,
Quote: |
Corrected oplev laser RIN plot at day 3
RXA:
- to measure RIN, the lever arm should be really short, not long.
- the beam should be 3x smaller than the active area of the diode
- the specular beam should be dumped on a razor dump.
- we need to make a summary page for HeNe laser testing so that we can see 24 hour specgrams of these things for ~3-4 lasers at the same time.
- We should add specgram stuff for the existing HeNe SUM channels on the active OLs.
GV: The channel the PD Steve is using is hooked up to C1:ALS-FC_X_F_IN. As I found out today, there can be considerable RF pickup between the C1:ALS-FC_X_F_IN and C1:ALS-FC_Y_F_IN channels, which share a common 4-pin LEMO cable - this is because the rise time of the square wave output of the Wenzel dividers is <1us, so suitability of this particular channel for the RIN measurement set up has to be reconsidered. Perhaps we can use one of the six spare PEM channels over at 1X6.
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We did the following:
1, switched data channel from C1:ALS-FC_X_F_IN to C1:PEM-MIC_1_OUT_DQ Actual connection at 1X7 rack, input C17
Tested channel with 1Hz, 100 mV sine wave through DV
2, placed BS into the beam path so the reflected value on the PDA100A 0.1mW, beam od ~1mm, beam path lenght 11 cm, gain 20dB 3.7Vdc
The full output of this 1103P 2.8 mW was saturating the PDA100A
Summery :finding it to be too good to be this good |
Attachment 1: RIN.jpg
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Attachment 2: RIN_1103P_rotated.pdf
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12876
|
Thu Mar 9 17:26:43 2017 |
Steve | Update | General | attempted ETMY picture taking |
I removed the video monitoring can and replaced it with Olympus SP-570UZ camera. It has no IR blocker. The OSEM light are dominant because I can not zoom in more.
I left the camera in place so you can try it. Leave the LEXAN plate on the glass window so no accident can happen. The illuminator is on and you can turn it off-on with the manual switch, close to the camera. Camera manual is on my desk.
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12881
|
Fri Mar 10 18:00:22 2017 |
Steve | Update | General | attempted ETMY picture taking |
Your technique works Koji |
Attachment 1: P3100044.JPG
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Attachment 2: P3090024.JPG
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12884
|
Mon Mar 13 16:47:41 2017 |
Steve | Update | PEM | Y-arm air conditon belts replaced |
The east end AC unit is arching over and running rough at CES. Called for mechanic.......
Both belts were replaced and the unit is running happily. |
12885
|
Tue Mar 14 09:08:11 2017 |
Steve | Update | Optical Levers | ETMX HeNe is dead |
ETMX oplev laser is dead. It will be replaced this after noon. Sus damping recovered. |
Attachment 1: this_morning.png
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12886
|
Tue Mar 14 10:40:30 2017 |
Steve | Update | SUS | OSEM filters are in |
We have 50 pieces in the clean cabinet. |
Attachment 1: filters.jpg
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12888
|
Tue Mar 14 15:05:18 2017 |
Steve | Update | Optical Levers | history of ETMX oplev laser |
Quote: |
ETMX oplev laser is dead. It will be replaced this after noon. Sus damping recovered.
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This 3 years old HeNe [ JDS 1103P, sn 351889 ] has been dying for some time or just playing possum at age 1,126 days
I did not replace the ETMX oplev laser because I was unable to bring up the the C1ASC_ETMX_OPTLEV_SERVO medm screen on laptops. |
Attachment 1: ETMX_1103P_3y.png
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12889
|
Thu Mar 16 08:22:16 2017 |
Steve | Update | SUS | ETMX damping |
Finally I see what kicks the sus damping off
Quote: |
Huh? So should we ask them to put the container back? Or do you have some other theory about ETMX tripping that is not garbage related?
Quote: |
ETMX sus damping recovered.
Note: The giant metal garbage container was moved from the south west corner of CES months ago.
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Attachment 1: laser_power_glitch.png
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12890
|
Fri Mar 17 10:47:16 2017 |
Steve | Update | Optical Levers | ETMX oplev laser replaced |
JDSU 1103P. sn T8070866, made March 2007, output power 2.7 mW, on pd 17,750 counts,
GV 17 March 3pm: I found the Innolight NPRO was off when I walked down to the X end earlier, possibly was accidentally tripped during the Oplev laser replacement. I turned it back on.
Quote: |
Quote: |
ETMX oplev laser is dead. It will be replaced this after noon. Sus damping recovered.
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This 3 years old HeNe [ JDS 1103P, sn 351889 ] has been dying for some time or just playing possum at age 1,126 days
I did not replace the ETMX oplev laser because I was unable to bring up the the C1ASC_ETMX_OPTLEV_SERVO medm screen on laptops.
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12892
|
Fri Mar 17 15:30:39 2017 |
Steve | Summary | SUS | oplev laser summary updated |
March 17, 2017 ETMX laser replaced at LT 3y with 1103P, sn T8070866 |
Attachment 1: oplev_sums.png
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12908
|
Mon Mar 27 15:36:27 2017 |
Steve | Update | PEM | particle counter inside of PSL enclousure |
Quote: |
The logging script is multiplying by 100 instead of 10 !
Quote: |
The MET#1 particle counter was moved from CES wall at ITMX to PSL enclousure south west corner at 11am.
The HEPA filter speed at the Variac was turned down to 20V from 40
This counter pumps air for 1 minute in every 20 minutes. Soft foam in bags used to minimize this shaking as it is clamped.
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Some one turned up the PSL HEPA rotation voltage from 20 V to 33 ( 120V Variac ) and X-arm AC set temp lowered to 68F
Effects at 12" height from optical table :
1.0, 0.5 & 0.3 micron particle count goes to zero and temperature fluctuaion increased
Rotation speed voltage was set to 30V
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Attachment 1: HEPA_flow_effects.png
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12909
|
Mon Mar 27 16:01:55 2017 |
Steve | Update | PEM | X arm AC set to 68F |
The X arm air conditioner was not regulating properly. The arm temp was warmer than usual. I requested thermistor calibration.
The mechanic reset the thermostate to 68F last week. It was 70-71F before.
The ETMX oplev laser now running 4 C lower at 30 C inside the enclousure.
The ETMX optical table top is 5 C cooler at 21 C
The ETMX concrete wall temp 20 C at 9am with flow bench on.
ETMY conrete wall temp 23 C at 9am |
12913
|
Tue Mar 28 16:47:40 2017 |
Steve | Update | safety | Projector bulb is out again |
Three replacement bulbs ordered
Rana can discribe how it happened.
IF A LAMP EXPLODES
If a lamp explodes, the gas and broken shards may scatter inside the projector and they may comeout of the exhaust vent.
The gas contains toxic mercury.
Open windows and doors for ventilation.
If you inhale the gas or the shardsof the broken lamp enter your eyes or mouth, consult the doctorimmediately.
Quote: |
This bulb was blown out on Feb 4, 2017 after 2 months of operation.
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12915
|
Wed Mar 29 09:24:28 2017 |
Steve | Update | lore | summery pages |
The summery pages are working at a slow motion speed. It's response time 12 minutes. |
12917
|
Wed Mar 29 16:38:00 2017 |
Steve | Omnistructure | Treasure | sus fiber illluminated |
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Attachment 1: fiber.jpg
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12921
|
Fri Mar 31 10:16:07 2017 |
Steve | Update | safety | laser safety glasses annual inspection |
Laser safety glasses cleaned in " Dawn Ultra " mild soap - water solution and measured for 1064 nm transmission at 150 mW
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Attachment 1: march2017.jpg
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Attachment 2: 2017march.jpg
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12922
|
Fri Mar 31 16:10:33 2017 |
Steve | Update | Treasure | Les Guthman |
Les Guthman interviews gradstudent Graig.
Main laser emergency shut off was acuated by accident during this fiming. The laser is turned on. |
12927
|
Tue Apr 4 11:24:21 2017 |
Steve | Update | safety | Projector bulb is out again |
Shipped out for repair.
Quote: |
Three replacement bulbs ordered
Rana can discribe how it happened.
IF A LAMP EXPLODES
If a lamp explodes, the gas and broken shards may scatter inside the projector and they may comeout of the exhaust vent.
The gas contains toxic mercury.
Open windows and doors for ventilation.
If you inhale the gas or the shardsof the broken lamp enter your eyes or mouth, consult the doctorimmediately.
Quote: |
This bulb was blown out on Feb 4, 2017 after 2 months of operation.
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It is back and running fine witth bulb 4-13-2017 |
12930
|
Thu Apr 6 15:35:44 2017 |
Steve | Update | PEM | envioirmental noise |
Building: Central Engineering Services
Date: Monday, 04/10/17
Time: 7:00 AM TO 9:00 AM
Notification: Crane Activity
Contact: Ben Smith, X-4190 Brad Nielsen, X-8751
Contractors will be removing the large vaporizer located on the South
side of CES. Vehicle access will be restricted due to crane placement
and operation, but there will be a single traffic lane available. This
work may create minor noise and vibrations. |
12931
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Fri Apr 7 13:46:23 2017 |
Steve | Update | SUS | ETMX enclosure feedthough |
ETMX enclosure feedtrouh cabeling corrected. |
Attachment 1: bad.jpg
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Attachment 2: good.jpg
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12932
|
Mon Apr 10 09:49:32 2017 |
Steve | Update | Optical Levers | oplev 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.
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12933
|
Mon Apr 10 09:58:35 2017 |
Steve | Summary | SUS | oplev 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
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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
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12941
|
Thu Apr 13 09:48:37 2017 |
Steve | Update | SUS | ITMY-UL and ETMX sensors |
Why ITMY UL can not see this earth quake? SRM and PRM are misaligned. ETMX is still not well.
We have to remember to check OSEM - magnet alignment when vented. |
Attachment 1: ITMY.png
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Attachment 2: ITMY-UL.png
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Attachment 3: ETMX?.png
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12953
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Thu Apr 27 17:55:33 2017 |
Steve | Update | Cameras | which camera to use for IR scatterring pictures |
Yesterday I failed to take good pictures of ETMY resonant arm of 1064 nm with Cannon Rebel T3i in RAW 22-27Mp & JPG dual- format. UFRaw file converter worked well. The IR blocker filter seems to be too good.
Today I used Olympus SP-570UZ ( without IR blocker), in raw format of 15Mp, fl 22.4mm, 15s including 2-3s flashlight, f/8 and auto focus This is just too much scattered IR for the Olympus.
Overexposed raw picture' jpg is shown at the PSL with diffraction patter of the camera.
I'll go back using the Nikon D40 with zoom 55-200mm as this Atm2 of May 2007 : manual focus, 15s, f/4-5.6, ISO 560, 826KB |
Attachment 1: P4270081RAWolym.jpg
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Attachment 2: Img0344.jpg
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12961
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Mon May 1 17:14:58 2017 |
Steve | Update | Cameras | ETMY & MC2 ccd cameras removed |
MC2 ccd camera is replaced by Olympus 570 zoom temporarly.
So as the ETMY ccd camera is replaced by Cannon Rebel.
Both viewport are under Lexan protection and covered by Aluminum foil....still, turn all lighting off if you do not want room light in the IFO
Do not remove Lexan shield!
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12964
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Wed May 3 16:02:36 2017 |
Steve | Update | General | PI pzt inventory check |
One is broken, two are ready to steer green and 3 available in un known condition
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Attachment 1: IMG_3678.JPG
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Attachment 2: PIpztETMYgreen.jpg
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