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ID Date Authorup Type Category Subject
  6429   Tue Mar 20 09:59:01 2012 steveUpdateIOOLaser tripped off

Today is janitor day. It still does not explain why the 2W Innolight tripped off about an hour ago. All back to normal.

.......................................................I asked Keven later, he admitted hitting the emergency shut off next to the chemical storage cabinet.

  6430   Tue Mar 20 16:53:48 2012 steveUpdatePEMcranes maintenance & certified inspection of 2012

Fred Goodbar of Konecrane has completed the annual certified crane inspection and maintenance of our cranes as required in safety document.

They are in good working condition and safe to use.

  6432   Wed Mar 21 10:31:28 2012 steveUpdateSAFETYAC power to ETMY turned off

ETMY sus damping was disabled. Green locking laser and associated electronics turned off. Computers and power supplies turned off at rack 1Y4

The electricians picking up ac power from 1Y4 manual disconnect box and installing conduit line to ISCT-ETMY east end optical table.

There will be no more daisy chaining this way. 

  6433   Wed Mar 21 11:32:47 2012 steveUpdateSAFETYAC power to ETMX turned off

Quote:

ETMY sus damping was disabled. Green locking laser and associated electronics turned off. Computers and power supplies turned off at rack 1Y4

The electricians picking up ac power from 1Y4 manual disconnect box and installing conduit line to ISCT-ETMY east end optical table.

There will be no more daisy chaining this way. 

 The power is back on at ETMY . c1iscey has not been restarted.

Now I'm turning ac power off at ETMX for the same job to be done.

  6434   Wed Mar 21 19:12:27 2012 steveUpdateComputersAC power back on both ends

Quote:

Quote:

ETMY sus damping was disabled. Green locking laser and associated electronics turned off. Computers and power supplies turned off at rack 1Y4

The electricians picking up ac power from 1Y4 manual disconnect box and installing conduit line to ISCT-ETMY east end optical table.

There will be no more daisy chaining this way. 

 The power is back on at ETMY . c1iscey has not been restarted.

Now I'm turning ac power off at ETMX for the same job to be done.

 The power was turned back on at 4pm It took some time for Suresh to restart the computers. We have damping but things are not perfect yet. Auto BURTH did not work well.

  6435   Thu Mar 22 08:14:21 2012 steveUpdateGreen Lockingdichroic mirror quotes with large wedge

Quote:

Dichroic mirror quotes are in the wiki.

ATF is pricy.

We got a good price from Laseroptik, but the wedges are 5 arcminutes. The fused silica grade is 0F, meaning the  homogeneity is 5 ppm instead of 1ppm.  I requested an other large wedge quote on the substrates.We may have to get substrates from somebody else and ship it to Germany

MLT quote is outrageously high

REO is not interested in this low volume job.

 

 The Laseroptik quote is here.The 2 degrees wedge cost is $40 on each optics!  See wiki

  6469   Fri Mar 30 08:58:37 2012 steveUpdateSAFETYSafety glasses checked

Bob cleaned all safety glasses in 10 % Liquinox soap in water solution first.  The  transmittance of glasses were checked at 100 mW 1064 nm S polarization, beam diameter  0.5 mm at 0-20 deg incident.

Coherent FieldMate power meter measured T= < 1 mW of all glasses.

  6470   Fri Mar 30 09:37:13 2012 steveUpdateSAFETYsafety audit 2012 CORRECTIONS

Quote:

Correction list by visiting safety committee, Haick Issaian is not shown:

1,  update laser, crane operator list and post it

2,  check fire extinguishers monthly, date and initials must be on the tags

3,  move drinking water tower so it does not block fire extinguisher

4,  post updated crane doc at cranes

5,  post present phone lists at IFO room phones

6,  emergency laser shutoff at the south end must be mounted without C-clamp

7,  use heavy cable tie to insure position of  mag-fan on cabinet top

 

Additional to do list:

a,  safety glasses to be cleaned

b, let the electrical shop fix Rack-AC power to optical tables at the ends

c, measure transmission of  laser safety glasses

d, update  IFO outside door info signs

e, update laser inventory and post it

f,  schedule annual crane inspection and renew maintenance contract

g, PSL enclosure  inner shelf needs a good clean up so it is earthquake safe

 

 Completed with the exception of d and g

  6472   Fri Mar 30 10:24:14 2012 steveUpdateSUSnew OSEM locking plunger

Quote:

Quote:

Our existing 300 series SS plungers from McMastercar #8476A43 are silver plated as Atm2 shows.

Problems:  1, they become magnetized after years being close to the magnets

                     2, they oxidize by time so it is hard to turn them

                    

I looked around to replace them.

Titanium body, nose and beryllium copper spring. None magnetic for UHV enviorment.

Can be made in 7 weeks at an UNREASONABLE $169.00 ea at quantity of 50

 In order to get a better price from Vlier's Tom Chen I changed Ti body back to SS304L-siver plated and music wire spring. The price is still ~$120 ea. at quantity 50

I will talk to Mike G about modifying the  McMaster plunger with a hex nut.

 Conclusion: There is no need to silver plate the SS plunger at the torque level we hold the OSEMs

Mike Gerfen will be done with 50 pieces by April 4 and he will give them to Bob for cleaning. They should be cleaned and baked in a jig so the springs would be compressed for better venting.

  6473   Fri Mar 30 17:37:09 2012 steveUpdateGeneralcutting green welding glass for beam dumps

Quote:

Schott, green welding glass, shade 14, 3 mm thick  was measured in the beam path of 1.2W, S polarization of 1064nm at ~1 mm diameter size as MC reflected path.

Absorption 95%, R 5% at incident angle 25-50 degrees. It looks like the perfect material for beam trap.

 

 The CIT Chemistry Glass Shop cuts turned out to be sloppy using diamond disc blade  cutter.

East coast Precision Glass & Optics  offered scribed cut and polished side. Their quote price was high and time consuming.

The GLASS HOUSE  shop in Pasadena 626 / 796-9151 on Walnut did a good and cheap job. Oscar the cutter will finish the rest of the cutting by next Friday, April 6

He used scribed cutting technic and his 1" x  0.5"  pieces are good. Bob will pick up them up.

  6558   Tue Apr 24 09:58:37 2012 steveUpdatePEMearthquake 3.9 magnitude

Local eq shakes the lab

  6559   Tue Apr 24 11:27:51 2012 steveUpdatePEMnew chairs

We received 6 new  chairs stools for the work benches that have 36" heights.

The control room east side and general office desks require 18" seat height. The new chairs stools have  minimum seat heights  26"

Please label chairs that we are getting rid of.

P4241026.JPG

  6571   Thu Apr 26 09:22:17 2012 steveUpdate under the east end optical table

Quote:

I added an U channel based bottom shelf at the south end today.

 I'm working on similar shelf at ETMY.  Precondition: NPRO in bypass mode, heater for doubling in bypass........since power outage?  Optical level servo turned off.......

U-channel based shelf in place.  Oplev servo is back on at 11:15am    The table may moved.  The oplev return is missing the quad by a few milimeter.

  6577   Fri Apr 27 08:11:19 2012 steveUpdateCDSc1ioo condition

 

 

  6643   Mon May 14 08:49:47 2012 steveUpdateSUSETMY damping restored

ETMY sus damping restored.

  6644   Tue May 15 08:44:55 2012 steveUpdateSUSETMX damping restored

ETMX sus damping restored

  6647   Wed May 16 14:06:49 2012 steveUpdateSUSTemperature rules

Guralp 1  is on the south side of IOO chamber

  6648   Thu May 17 15:31:22 2012 steveUpdateGeneralbeam trap posts & clamps for vacuum

 Aluminum posts and SS clamps for green glass traps in vacuum will be out of the shops by June 6, 2012 the latest

 

  6649   Fri May 18 11:19:17 2012 steveUpdateSUSETMY oplev laser is dead

 

 The typical sign of a dying gas laser is that it glows for a few minutes only. The power supplies are fine.

Two new  JDS - Uniphase 1103P lasers ( NT64-104 )  arriving on Monday, May 21

  6650   Fri May 18 15:25:15 2012 steveUpdateSUSAR coated lens swapped in at ETMX oplev

Quote:

 ETMX oplev had 6 mm diameter beam on the qpd.  I relayed the beam path with 2 lenses  to get back  3 mm beam on the qpd

BRC 037  -100 Bi _concave lens and PCX 25  200 VIS do the job. Unfortunately the concave lens has the AR 1064.

 

 

 The uncoated bi-concave lens was replaced by AR coated one: KBC 037 -100 AR.14 resulting 35% count increase on qpd

  6652   Mon May 21 07:45:39 2012 steveUpdateIOOPMC locked

I locked the PMC and the MC followed instantly.

  6656   Tue May 22 08:03:01 2012 steveUpdateSUSETMY oplev gets new laser

Quote:

 

 The typical sign of a dying gas laser is that it glows for a few minutes only. The power supplies are fine.

Two new  JDS - Uniphase 1103P lasers ( NT64-104 )  arriving on Monday, May 21

 Yesterday I swapped in new He/Ne laser with output power 3.5 mW  The return spot on qpd is large ~6mm in diameter and 20,500 counts

The spot size reduction require similar layout as ETMX oplev.

  6665   Wed May 23 10:40:21 2012 steveUpdateIOOPMC locked

Quote:

I locked the PMC and the MC followed instantly.

 

  6666   Wed May 23 11:30:39 2012 steveUpdatePEMnew emergency back up lights installed

New self checking emergency back up lights were installed at 13 locations in the 40m lab.

  6672   Thu May 24 10:10:04 2012 steveUpdateIOOPMC locked

 The PMC  behavior is not changed.

 

  6678   Thu May 24 16:39:47 2012 steveUpdateGeneralsteve's webpage example

3 strip charts monitoring on 24 hours time scale: Vac,  PSL-IFO,  SUS and 10 channel video monitoring inside - outside  of 40m lab

  6700   Tue May 29 10:08:21 2012 steveUpdateIOOcentered IOO monitoring qpds

IOO Angle & IOO Position QPDs centered.

  6706   Tue May 29 15:55:22 2012 steveUpdateSUSETMY oplev spot size reduced

Quote:

Quote:

 

 The typical sign of a dying gas laser is that it glows for a few minutes only. The power supplies are fine.

Two new  JDS - Uniphase 1103P lasers ( NT64-104 )  arriving on Monday, May 21

 Yesterday I swapped in new He/Ne laser with output power 3.5 mW  The return spot on qpd is large ~6mm in diameter and 20,500 counts

The spot size reduction require similar layout as ETMX oplev.

 The oplev path is relayed and the spot size on the qpd is reduced. I still have to clean up and replace "Miki Mouse" lens holder.

There was no IP-ANG coming out of the chamber at this time!

  6729   Thu May 31 11:02:14 2012 steveUpdateLockingETMX 1064 trans camera

Quote:

Quote:

...will be helpful for acquiring lock after the vent.  We should install a camera at ETMX.

 Do that.

 Jenne and Steve

Sony CCD in place needs alignment and ND filter

  6738   Fri Jun 1 08:01:46 2012 steveUpdateComputersc1sus and c1iscex are down

Quote:

Something bad happened to c1sus and c1iscex ~20 min ago.  They both have "0x2bad" 's.  I restarted the daqd on the framebuilder, and then rebooted c1sus, and nothing changed.  The SUS screens are all zeros (the gains seem to be set correctly, but all of the signals are 0's).

If it's not fixed when I get in tomorrow, I'll keep poking at it to make it better.

 

 

  6739   Fri Jun 1 08:17:47 2012 steveUpdateIOOPMC trends

Quote:

IOO Angle & IOO Position QPDs centered.

 PMC trend of 400 and 1200 days

The Innolight 2W based PSL- IOO was implemented in the ~ summer of 2010

  6741   Fri Jun 1 10:00:03 2012 steveOmnistructureGeneral40m Wireless Network

Quote:

Mike Pedraza came by today to install a new wireless network router configured for the 40m lab network.  It has a 'secret' SSID i.e. not meant for public use outside the lab.  You can look up the password and network name on the rack.  Pictures below show the location of the labels.

40m_Wifi.png

 Mike P swapped in a new network router Linksys E1000

  6744   Fri Jun 1 18:07:32 2012 steveUpdateSUSOplevs servo values

Quote:

For some reason the state of the oplevs is completely different for almost every suspension.  They have different sets of filters in the bank, and different filters engaged.  wtf?  How did this happen?  Is this correct?  Do we expect that the state of the oplevs should be different on all the different suspensions?  I wouldn't have thought so.

I discovered this because the PRM is unstable with the oplevs engaged.  I don't think it was yesterday.  Is something hidden changing the oplev settings?

 As of February 23, 2012 when oplev PIT and YAW transfer functions were taken

 

OPLEV SERVO 300^ 2:0 BR ELP RLP RES GAIN QPD counts OD mm           
                   
ETMY pit 300^ 2:0 BR 35 80 0.5 -1.5 15,500 ~1  
ETMY yaw 300^ 2:0 BR 35 80 0.6 -1.0      
ETMX pit 300^ 2:0 BR 35 80 0.5 0.5 1,500 ~1.5  
ETMX yaw 300^ 2:0 BR 35 80 0.6 1.0      
ITMY pit 300^ 2:0 BR   80   2.0 15,000 ~2.5  
ITMY yaw 300^ 2:0 BR   80   -4.0      
ITMX pit 300^ 2:0 BR   80   1.0 1,350 ~1.5  
ITMX yaw 300^ 2:0 BR   80   -2.0      
BS pit 300^ 2:0 BR 50     0.5 3,500 ~1  
BS yaw 300^ 2:0   50   3.3 -1.0      
PRM pit 300^ 2:0 BR     3.3 1.0 4,000 ~2  
PRM yaw 300^ 2:0 BR 35   3.3,  4 -0.5      
SRM pit 300^ 2:0 BR 40     -2.0 2,600 ~2.5  
SRM yaw 300^ 2:0 BR 40     2.0      

 

  6752   Tue Jun 5 09:32:12 2012 steveUpdateSUSPRM oscillation

What not to do:

The PRM oplev servo was left on and it was driving this oscillation overnight.

  6753   Tue Jun 5 09:44:14 2012 steveUpdatePSLref cavity ion pump must be pumped

Quote:

The ref cavity ion pump was running at 7.7kV instead of 5kV

This Digitel SPC-1 20 l/s ion pump should be running at 5kV

 I noticed that the ion pump was turned off.

It was turned ON. It showed 0.00 microA at 5kV  The current display is not sensitive enough. There must be some small outgassing or leak. It adds up if we stop pumping.

We want to keep the reference cavity in pristine condition. It required the ion pump running all times.

  6754   Tue Jun 5 14:17:14 2012 steveUpdatePEMair cond maintenance

 

 Air conditioning maintenance is scheduled for tomorrow from 8 to 11am

  6764   Wed Jun 6 09:27:09 2012 steveUpdateSUSPRM damping restored

Quote:

What not to do:

The PRM oplev servo was left on and it was driving this oscillation overnight.

 Oplev servo turned off and sus damping restored. What is kicking up the PRM?

  6765   Wed Jun 6 14:17:56 2012 steveUpdateComputersiMac ordered

Rana, Steve,

 


from Apple Store on line

  • $2,139.00

27-inch iMac

  • Part number: Z0M6

Configuration

  • 2.7GHz Quad-Core Intel Core i5
  • 16GB 1333MHz DDR3 SDRAM - 4x4GB
  • 1TB Serial ATA Drive
  • AMD Radeon HD 6770M 512MB GDDR5
  • Apple Mouse
  • Apple Keyboard with Numeric Keypad (English) & User's Guide
  • Accessory Kit
  6766   Wed Jun 6 14:36:58 2012 steveUpdateSUSETMY oplev work finished

Quote:

Quote:

Quote:

 

 The typical sign of a dying gas laser is that it glows for a few minutes only. The power supplies are fine.

Two new  JDS - Uniphase 1103P lasers ( NT64-104 )  arriving on Monday, May 21

 Yesterday I swapped in new He/Ne laser with output power 3.5 mW  The return spot on qpd is large ~6mm in diameter and 20,500 counts

The spot size reduction require similar layout as ETMX oplev.

 The oplev path is relayed and the spot size on the qpd is reduced. I still have to clean up and replace "Miki Mouse" lens holder.

 Late entry for Monday morning June 4, 2012

Cables were stress relieved. Cable entry - exit ports enlarged. Air gaps were minimized.

  6781   Thu Jun 7 08:12:20 2012 steveUpdateSUSPRM is still oscillating

Quote:

Quote:

What not to do:

The PRM oplev servo was left on and it was driving this oscillation overnight.

 Oplev servo turned off and sus damping restored. What is kicking up the PRM?

 The PRM oscillation stopped by turnig off oplev servo.

Do not turn Oplev Servo on when PRM is missaligned !

 

  6782   Thu Jun 7 09:52:05 2012 steveUpdatePEMair cond maintenance

Quote:

 

 Air conditioning maintenance is scheduled for tomorrow from 8 to 11am

 Jeff checked and  replaced filters  as needed. Job completed this morning.

  6790   Fri Jun 8 15:24:08 2012 steveUpdateVACRGA scan at day 276 and pressure plots

Quote:

We tried not to open chambers above 10,000 particles of 0.5 micron cf/min

New items going in:                       2 rasor beam traps, 5 badly oxidized old silver plated  setscrew with spring loaded tips......to be replaced in the future, viton tips for eq screws....some are lose, gold plated allen wrench installed at ITMX bottom, reglued magnet on ITMX

Bad hardware things found:          nylon ball "locking elements" on OSEM locking set screws with screwdriver  slot, lose  1064 nm filter on OSEM pd

 40m - pumpdown 71- maglev pumping speed - at day 276........all normal

  6791   Mon Jun 11 09:37:16 2012 steveUpdateIOOPMC locked

Quote:

Quote:

IOO Angle & IOO Position QPDs centered.

 PMC trend of 400 and 1200 days

The Innolight 2W based PSL- IOO was implemented in the ~ summer of 2010

 The PMC was locked and the MC followed intantly

  6804   Tue Jun 12 16:33:32 2012 steveUpdateSUSPRM oplevs servo ON for confirmation

Quote:

Yuta claims he fixed the PRM oplev by centering it the other day, but no one has left it on and watched it for a long while, to make sure it's okay.  We watched it now for ~2 min, and it was good, but we're leaving the oplevs off anyway for the night.  Tomorrow we should restore PRM (it's currently restored), turn on the oplevs, and let it sit to make sure it doesn't go crazy.

 

 PRM oplev servo was turned on with PITgain 0.5  and YAWgain  -0.7

Note: gain settings were PIT  1.0  and  YAW --0.5   on Jun 1, 2012 that I measured Feb 23, 2012

  6805   Tue Jun 12 17:04:55 2012 steveUpdateSUSPRM oplevs servo is still bad

Quote:

Quote:

Yuta claims he fixed the PRM oplev by centering it the other day, but no one has left it on and watched it for a long while, to make sure it's okay.  We watched it now for ~2 min, and it was good, but we're leaving the oplevs off anyway for the night.  Tomorrow we should restore PRM (it's currently restored), turn on the oplevs, and let it sit to make sure it doesn't go crazy.

 

 PRM oplev servo was turned on with PITgain 0.5  and YAWgain  -0.7

Note: gain settings were PIT  1.0  and  YAW --0.5   on Jun 1, 2012 that I measured Feb 23, 2012

 It is still oscillating. Gains turned down to zero.

  6814   Wed Jun 13 11:19:05 2012 steveUpdateSUSIDC receptacles clamped

The MC_ IDC 64 pin cables from sat. amplifiers to junction-interface-board towards  whitening - dewhitening at the back of rack 1 X 5 are finally  clamped with

All other sus cables of the same kind have the correct short latch arm to lock them in for reliable contact.

  6844   Thu Jun 21 09:01:18 2012 steveUpdateSTACISthe resurrection of STACIS -surf

There is a small wood cabinet under the south end flow bench, labeled STACIS.

Unit is complete with extension cards and cables.

  6845   Thu Jun 21 09:10:08 2012 steveUpdatePEMflow bench must be running all times

The south end flow bench HEPA filter should be run all times. You can turn it off for a measurement or two but remember we are storing clean optics there.

The zero count bench will reach  room particle count  ~ 10,000 in one minute.

  6848   Thu Jun 21 15:00:55 2012 steveUpdateSAFETYSURFs 2012 safety training

Masha, Eric, Yaakov, Liz and Sasha received 40m specific basic safety training.

  6860   Sat Jun 23 18:44:15 2012 steveUpdateGeneralpower surge has no effect on the lab

I was notified by CIT Utilities that there was a power surge or short power outage this after noon.

Lab conditions are normal:  c1ioo is down.  The south arm AC was off......I turned it back on.

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