40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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ID Date Authorup Type Category Subject
  226   Mon Jan 7 09:01:39 2008 steveUpdateSUSBS sus damping restored
The BS sus damping was lost at 8am Sunday morning.
Attachment 1: bssdl.jpg
bssdl.jpg
  232   Thu Jan 10 10:38:02 2008 steveUpdateSUSetmy damping restored
The IST building onstruction has really started yesterday and continuing today with big heavy ground breaking
machinary. The MC is holding lock and the suspentions are hanging on.

ETMY does not like this.

SUS-MC2_LLPD_VAR monitor is a good indicator of seismic activity on this 12 days plot
Attachment 1: etmysus.jpg
etmysus.jpg
Attachment 2: sustrend16d.jpg
sustrend16d.jpg
  233   Thu Jan 10 12:08:23 2008 steveUpdateSUSwhy did the BS move?
Attachment 1: bshopped.jpg
bshopped.jpg
  235   Thu Jan 10 15:04:04 2008 steveUpdateSUSilluminator light effect on BS position
The bs chamber illuminator light was turned on this morning and left on.
Earlier on Rana noticed that the bs moved.
I follwed up to see what happened. I turned off oplev servo and tried to recenter on oplev pd
by adjusting pitch and yaw biases. It did not move. I looked at suspention and realized that the
illuminator was still on. I turned it off and to my amazement the the AP spot started flashing
Attachment 1: bssusilum.jpg
bssusilum.jpg
  237   Mon Jan 14 14:41:09 2008 steveUpdateSUSetmy sus damping restored & mz relocked
Tree days trend of MZ HV drift is typical these days.
So as the etmy sus inability to hold damping for longer then 2-3 days.
Attachment 1: etmysus&mzhvtrend.jpg
etmysus&mzhvtrend.jpg
  254   Wed Jan 23 09:27:55 2008 steveUpdate etmy sus damping restored
Seismis event trips etmy
Attachment 1: etmysus.jpg
etmysus.jpg
  255   Wed Jan 23 11:41:06 2008 steveUpdatePEMsulfur smell in 40m
Led - acid car batteries were overcharged in the machine shop next door
and sulfuric acid smell is coming over to the ifo room.

Entry room 103 is specially bad.
  258   Thu Jan 24 11:52:56 2008 steveUpdatePEMthe mud is cleaned up & MOPA shutter is opened
Safety glasses are required again!

I have just opened the mopa shutter.
One janitor came to help with muddy floor.
Rack 1x1 toward ITMX chamber and the south wall of these area
were completely covered by mud. I wiped the floor of bottom of the rack
with towels. The cables were lifted and still should be wiped.

The bottom of LSC rack got less water, only on the west side.

We are ready to bring up the computers.

Thanks to ALL with the clean up, including Alan Rice
who was really helpful.

  264   Fri Jan 25 09:22:21 2008 steveUpdatePEMburned toast award goes to
DYM for collaborating with the enemy.

In order to minimize the number of ants visiting our lab we have to take out side the lab
all food left over and organic waste. If you are eating here do not expect someone else
to clean up after you.

Thanks for your cooperation.
  299   Wed Feb 6 09:17:31 2008 steveUpdatePEMIST building construction continoues
The bulldosers at work
Attachment 1: seismic8d.jpg
seismic8d.jpg
Attachment 2: seisioo.jpg
seisioo.jpg
  308   Mon Feb 11 14:24:19 2008 steveUpdatePEMmore earthquakes
ITMX and ITMY sus damping restored after Baja earthquake 5.1 mag at 10:29 this morning.

The ground preparation for The ITS building is almost finished.
Activity is winding down, however the Baja California_ Mexico earthquake zone
"Guadala Victoria" started acting up on Friday.

http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/special/California_Nevada_eqs.php
Attachment 1: eqfeb11.jpg
eqfeb11.jpg
  322   Tue Feb 19 10:14:13 2008 steveUpdateVACrga logging needs help
The rga head and controller are running fine, but the data logging is not.
  325   Wed Feb 20 11:34:17 2008 steveUpdatePSLlaser head temp is up
MOPA head temp is running at 20.3C now
Nomally it is at 18.5C
Attachment 1: htempup.jpg
htempup.jpg
  326   Wed Feb 20 16:24:37 2008 steveUpdatePSLthe laser is recovering slowly
Head temp is still 20.5C and decreasing slowly.
Power output 2.9W
NPRO power 22 mW is increasing as head is cooling down
Attachment 1: laserecoverring.jpg
laserecoverring.jpg
  327   Thu Feb 21 09:56:26 2008 steveUpdatePSLthe laser is back
The laser and the psl recovered.
The water chiller temp is 19.98C and head temp 18.4C
Power 3.2W
PMC_T 3.1

c1iovme was restarted and the mc is locking now
Attachment 1: laserisback.jpg
laserisback.jpg
  335   Fri Feb 22 14:45:06 2008 steveUpdateMOPAlaser power levels

At the beginning of this 1000 days plot shows the laser that was running at 22C head temp
and it was send to LLO

The laser from LHO PA#102 with NPRO#206 were installed at Nov. 29, 2005 @ 49,943 hrs
Now,almost 20,000 hrs later we have 50% less PSL-126MOPA_AMPMON power
Attachment 1: lpower1000d.jpg
lpower1000d.jpg
  351   Mon Mar 3 09:25:33 2008 steveUpdateVACrga scan logging is working now

Quote:

Quote:
The rga head and controller are running fine, but the data logging is not.


It should run tonight at 1:25 AM. To get the cron job to work properly on op340m, I had to make wrapper sh script which defines the perl library before calling the actual RGAlogger script.




Thanks to Rob, it is working !

The baked, calibrated rga head
model# M206M, s/n #c128035 was reinstalled at the 40m ifo on Feb. 8, 2008
Faraday mode dwell time was increased from 2 to 16 sec
Rga head temp at top silver gaskit 45.2 C
The noise floor is at 1E-12 Torr

There is more detail in logbook VMI-14 p 107

pd65-m-d119
Attachment 1: rgalogworks.jpg
rgalogworks.jpg
Attachment 2: cc1.jpg
cc1.jpg
  352   Mon Mar 3 13:58:10 2008 steveUpdateComputers RFM Network are down
The CODAQ_RFNETWORK are down, except C1SUSVME & AWG
  365   Fri Mar 7 19:04:39 2008 steveOmnistructurePSLlaser pointer
Green laser pointer was found in my desk.
I blamed Rana for not returning it to me after a conference talk.
It is surprisingly bright still.
I will bring sweets for Wednesday meeting.
  385   Thu Mar 20 15:28:20 2008 steveUpdateVACtp2 's drypump replaced
The fore pump of tp2 was replaced at fore line pressure 998m Torr
  388   Fri Mar 21 09:02:03 2008 steveUpdateVACtp 2 failed
Small turbo #2 is the forepump of the maglev.
It failed last night, shut down the maglev and interlock closed V1
Ifo pressure is 20 mTorr now. The Yarm was still locked at 8am this morning.
The PSL beam to MC was blocked just before the output periscope.
The psl mechanial shutter did not work from epic screen.
  409   Wed Apr 2 15:03:51 2008 steveUpdateGeneralreflectivity of black glass
The reflectivity of black glass, shade 12 was supplied by Donald O'Shea
of Emerald Glass Inc., Westlake, OH 44145

The reflectivity of this glass was measured as shown

Old 1064 nm Crysta Laser with poor beam quality was the source.
Attachment 1: bg12refl.pdf
bg12refl.pdf
Attachment 2: bg12refsetup.pdf
bg12refsetup.pdf
  417   Mon Apr 7 18:58:49 2008 steveUpdateGeneralreflectivity of SS304
The reflectivity of stainless steel 304 super polished # 8 was measured the same way as elog entry 409

The reflectivity: 74 +- 1 % from incident angle 10 to 80 degrees
Attachment 1: ss304s8refl.pdf
ss304s8refl.pdf ss304s8refl.pdf
  418   Tue Apr 8 09:08:54 2008 steveConfigurationPEMweather station disconnected
We can not leave cables in the walkways and go on vacation.
I disconnected the weather station from the DAQ
Every Tuesday is janitor day in the 40m.
We have to give him free space for doing a good job.

Burned toast award goes to Andrey.
Attachment 1: toast.jpg
toast.jpg
  423   Thu Apr 17 15:00:59 2008 steveUpdateVACvac controller computer to be replaced
Now that Rosalba is up and running someone should step forward to volunteer for this job.

Old desk top at the Vacuum Rack should be replaced by a functional less old computer so
the vacuum controller can count on an emergency situation. It's only has to be able to run medm
The existing one is dying.
  443   Thu Apr 24 15:57:53 2008 steveConfigurationSAFETYSafety at AP-ISCT
I measured the output power of the psl after the mechanical shutter.

It was 1.1 W with Ophir power meter, than unlocked the MC and measured
the power at the MC-REFL Beam Dump at the AP-ISCT 0.9 W
Power on MC-REFL photodiode 92 mW

High power metal beam shields were installed around the beam path of
MC-REFL between AP-Viewport and MC-REFL Beam Dump.
Placed HIGH POWER LASER BEAM PATH warning signs on table frame and top
covers.

Last week I placed a small monitor on the top of the OOC that
monitors the resonant spot of MC2. Please keep an eye on this monitor
when working on the AP-ISCT

AP table should NOT be left uncovered. One experienced laser operator
has to be present if the top is removed and IR-viewer scan required.
We need your full cooperation to keep this lab safe.
Attachment 1: P1020197.JPG
P1020197.JPG
Attachment 2: mcrefl3.JPG
mcrefl3.JPG
  450   Fri Apr 25 15:44:21 2008 steveUpdatePSLscattering measurments
In pursuit of a low back scattering, high power beam dump we looked at materials such:
polished copper, polished aluminum, diamond cut aluminum, variety of polished & heat treated stainless steel and shades of black glasses.
Black glass is ideal at low power. Superpolished SS 304 #8 is the only material that measures close to bg
We are still looking for a conductive low back scattering material that would be ideal for a good high power beam trap.

Black glass-shade 12, ss304 superpolished #8 and white paper-B98-24lbs back scattering were compared at 1064 nm

Atm 1: data plot numbers from front panel of SR830 display,
sensitivity: 1x1 mV for bg and ss
1x1 V for wp

Atm 2: drawing of measurement set up
Atm 3: SR830 lock.amp settings
Atm 4: view from steering mirror
Atm 5: view from black glass trap
Atm 6: white paper
Attachment 1: scatmeas20080425.xls
Attachment 2: scattring_set_up_20080425.ppt
Attachment 3: sr830settings.pdf
sr830settings.pdf
Attachment 4: viewfmirror.pdf
viewfmirror.pdf
Attachment 5: viewfbgtrap.pdf
viewfbgtrap.pdf
Attachment 6: wpnmount.pdf
wpnmount.pdf
  462   Thu May 1 08:31:51 2008 steveUpdateSUSearthquake trips etmy & mc1
Earthquake at Lake Isabel magnitude 4.4 at 1am today shakes the 40m
ETMY and MC1 watchdogs tripped.
Sus damping restored.
  465   Mon May 5 15:53:14 2008 steveUpdateVACdrypump replaced & readbacks are out
The small turbo pump of the annulus system is tp3
It's drypump was replaced at 1.4 Torr after 8 months of operation.
The rebuilding cost of this SH100 drypump is getting ridiculously high $1349.
I'll look for a replacement.

Joseph rebooted c1vac2 card on Apr 24 entry#441
This restarted the readbacks of the turbos and ion pumps for a while.
That was nice. The readbacks are not working again

  472   Fri May 9 08:40:24 2008 steveUpdateSUSETMY sus damping restored
ETMY lost damping at 19:10 last night.
There was no seismic event than.
Sus damping was restored this morning.
  474   Tue May 13 10:15:52 2008 steveUpdateSUSrestored damping of BS & PRM
I think our janitor was cleaning too heavy handedly.
The BS and PRM sus damping were lost.
They were restored.
  475   Tue May 13 10:38:28 2008 steveUpdateComputersrfm network is down
The RFM network went down yesterday around 5pm
Only c1susvme1 is alive but it's timing is off.
Andrey is bringing the network up.

Andrey wants to make an addition first that our situation is very much similar to that described by Rana in his elog entry # 353 (March 03). All of the rectangular boxes are red, except for SUS1-c1susvme1 and AWG (only these two rectangles are green).
  478   Thu May 15 10:40:21 2008 steveHowToGeneralLisa Goggin, PhD
Lisa Goggin successfully defended her thesis on May, 13 2008

"A Search For Gravitational Waves from Perturbed Black Hole Ringdowns in Ligo Data"

She started out as a surf student in the 40m.

Congratulation!
Attachment 1: lisa.JPG
lisa.JPG
  487   Mon May 19 11:49:57 2008 steveUpdateSUSetmy oplev laser replaced
The 9 years old Uniphase HeNe was replaced by a new JDSU 1103P
Power output ~3.5 mW, reflected light back on qpd ~140 microW, 12,800 counts
Andrey will get the ~2.5 mm od spot on the qpd smaller by replacing
the f1000 lens
  488   Tue May 20 09:28:42 2008 steveBureaucracySAFETYsafety traning for 40m
Tara Chalernsongsak, new gradstudent for K. Libbrecht was introduced to the basics of the 40m operations.
  491   Thu May 22 11:21:45 2008 steveBureaucracySAFETYearly surf sudent
Caltech under grad Eric Mintun received the 40m safety training.
Now he has to read and sign SOP of laser and ifo.
He'll be working with GigE cameras with Joe
  502   Wed May 28 14:19:47 2008 steveUpdatePSLkaleidoscope of psl
atm 1: scattering psl table optics from the top of the output periscope f4, 60s @MOPA 3 W
atm 2: scattering psl table optics from the top of the output periscope f4, 20s
atm 3: competing GigE cameras on the north end of psl table
atm 4: yellow "soft" washer to be replaced on psl output periscope
atm 5: ETMY-ISCT in disarray
Attachment 1: pslscat.png
pslscat.png
Attachment 2: pslscat2.png
pslscat2.png
Attachment 3: 2GigEs.png
2GigEs.png
Attachment 4: perwash.png
perwash.png
Attachment 5: etmydisarray.png
etmydisarray.png
  504   Thu May 29 16:32:09 2008 steveUpdateSUSetmy oplev is back
I relayed the optics for ETMY-oplev as shown in pictures below.
The reflected beam goes directly to the qpd
Attachment 1: P1020417.png
P1020417.png
Attachment 2: P1020420.png
P1020420.png
  505   Thu May 29 16:49:49 2008 steveBureaucracyPhotosYoichi has arrived
Yoichi had his first 40m meeting. We welcomed him and Tobin, who is visiting, by sugar napoleons that
Bob made.
Attachment 1: yoichi.png
yoichi.png
Attachment 2: bobsn.png
bobsn.png
  516   Wed Jun 4 10:18:52 2008 steveUpdatePSLwedged SS beam trap
I moved the SS trap over to the psl table.
Texas super # 8 was used from the large shipment.
TXs#8 scattering measured as before, meaning the polishing is good.

Go's squeezing power pick up 350 mW was used.
I made two ~30 degrees wedge traps using 6" x 4" and 12" x 4" SS 0.039" thick
with copper backing of similar size.

There was too much scattering and I could not minimize them all.
It is very helpful to have so much space on the psl table.
It shows more of the weakness of this kind of trap.
I did not dare to turn up the power.
Attachment 1: trap1.png
trap1.png
Attachment 2: trap2.png
trap2.png
  523   Fri Jun 6 15:56:00 2008 steveBureaucracySAFETYYoichi received safety training
Yoichi Aso received 40m specific safety training.
  524   Fri Jun 6 16:10:51 2008 steveUpdatePSLHEPA filters are running at 100%
The psl HEPA filters were turned up to run at 100% to accommodate beam trap work on Tuesday, June 3, 2008
  528   Tue Jun 10 08:37:18 2008 steveUpdatePSLbeam trap is being tested
High power beam trap is being tested just west of FSS area on psl enclosure.

When the pmc is operating at low power that means that the rest of the 3W is going into the
circular SS trap.

Please beware of the high power beam trap test
Attachment 1: trapss3w.png
trapss3w.png
  529   Wed Jun 11 11:45:25 2008 steveUpdatePSLss trap works
The trap works well at 3 W level. No back reflected beam coming out of the trap on low power
sensing card level. The back scattering was not measured. The trap is insensitive to small pointing variations.
The SS surface did not show any visible degradation after 16 hrs of 3w exposure at elliptical beam size 4x8 mm

It is ready to be placed into the 35 W beam.
Attachment 1: P1020534.png
P1020534.png
Attachment 2: P1020533.png
P1020533.png
  550   Fri Jun 20 17:42:48 2008 steveUpdatePSLSS trap scattering compared to black glass trap
Circular SS304 trap was compared to wedged black glass trap.

The measurement set up of entry 529 was changed to define polarization.
CrystaLaser was remounted in horizontal position and half wave plate was placed after it.
These measurements were done in horizontal polarization.

atm1: the cSSt and wBGt was moved horizontally, ~90 degrees of the incident beam
atm2: traps were rotated around the incident beam, ~20 degrees each direction
atm3: set up
atm4: top view of traps
atm5: side view of trap
Attachment 1: cSSt_1.png
cSSt_1.png
Attachment 2: cSSt_2.png
cSSt_2.png
Attachment 3: scatset_61908.png
scatset_61908.png
Attachment 4: cSSt&wBGt.png
cSSt&wBGt.png
Attachment 5: cSStbeam.png
cSStbeam.png
  581   Fri Jun 27 09:20:15 2008 steveFrogsPEMdust particle count is up & alarm handler is on
This 3 years plot show the trend of seasons.
When outside air quality goes bad ( 0.5 micron > 1 million ) the lab follows.
I will demonstrate this effect with a 4th of July fire works calibration.
Let's do not forget the construction activity next door either.

The alarm handler is busy:
It's sound level were reset to a modest level yesterday.
It would be nice to change the alarm sound so it can play Wagner:Der Ring des Nibelungen:
Das Rheingold, Die Walkure & Siegfried and Gotterdammerung
or something more appropriate than the present frog call

1, half micron count is climbing ( it's close to 16k now )
2, MZ refl signal is too high
3, MC lenght servo LO is too
Attachment 1: dust3y.jpg
dust3y.jpg
  600   Mon Jun 30 08:59:23 2008 steveUpdateIOOIOO-MC_DEMOD_LO is low
The alarm handler is beeping relentlessly: asking for help in high partical count and low demod signal
Attachment 1: demlo.jpg_____
demlo.jpg_____
  608   Tue Jul 1 09:26:33 2008 steveUpdateComputersRFM network is down
  609   Tue Jul 1 10:15:22 2008 steveUpdatePSLeventfull two days
The laser recovered from a short temp rise. The MZ was aligned and realigned. The suspentions were kicked up accidentally.
Now the computers are down.
Attachment 1: 2d.jpg
2d.jpg
  624   Wed Jul 2 15:14:42 2008 steveUpdateGeneraladded beam traps
I placed baked razor beam trap after INJ_SM1 and flipper in the injection path on the AP table


Quote:
I have constructed the beam injection optics for the abs length measurement.

The injection beam was coarsely aligned to the interferometer. The reflected beam from SRM was already seen at AS CCD.
I have attached the optical configration for this measurement and the optics layout at the AP table.

I am going to go to LHO for three weeks. During the absence Alberto tunes the mode matching and the alignment of the interferometer.

In the process of making this report, I noticed that one of the iris apertures is about disturbing the beam for OMCR CCD. I will check this before I go to Hanford. Also an RF spectrum analyzer is at the AP table. I try to return this near the PSL on Monday morning.

Attachment 1: Optical configuration for the abs length measurement.
1) One of the arms is locked to the PSL beam by the main control system (red).
2) A laser beam is injected from the AS port (blue). This laser essentially has different frequency from that of PSL.
3) The injected beam and the outgoing PSL beam appear at the output of the faraday in the injection system.
4) They beat each other at the frequency difference of those two lasers.
5) A PLL is used to lock the frequency difference to a local oscillator (LO).
6) The LO frequency is swept at around 3.87MHz, that is the approximate FSR frequency of the arm cavity.
7) If the LO frequency hits the FSR within the resonant width, the beating also appears at the transmitted light as the injected beam also becomes resonant to the arm cavity.
8) Amplitude of the beating at the transmitted light is measured by a RF spectrum analyzer as a function of the LO frequency. We get the FSR frequency (= the arm cavity length) from the top of the resonance.

Attachment 2: Optics at the AP table for the laser injection
700mW NPRO, laser source. vertically polarized.
Periscope, to raise the beam 1 inch to make the beam at the 4 inch elevation.
INJ_SM1/INJ_SM2, steering mirrors to align the injection beam to the IFO beam.
HWP1, half wave plate to make the beam to the farady horiz-polarized. nominal 42deg on the readout.
FI, Faraday isolator for protection of the NPRO from the returning light, for obtaining the returning light.
HWP2, to make the beam from the Faraday horiz-polarized. nominal 357deg on the readout.
MM_Lens, f=125mm to match the laser mode to the IFO beam.
SM1/SM2, steering mirrors to align the IFO beam to the Farady Isolator.
IRIS1/IRIS2, for the coarse alignment of the injection beam.
FLIP, flipper mount to turn on/off the injection optics.

Alignment procedure of the injection system
0) Ignite NPRO several hours before the experiment so that the laser frequency can be stable.
1) Turn up FLIP. Close the shutter of NPRO.
2) Adjust SM1/SM2 so that the ifo beam can appear at the output of FI.
3) Adjust height and position of IRIS1/IRIS2 with regard to the ifo beam so that the ifo beam goes through IRIS1/IRIS2 even when they are closed.
4) Turn down FLIP. Open the shutter of NPRO.
5) Adjust INJ_SM1/INJ_SM2 so that the injection beam can go through IRIS1/IRIS2 even when they are closed.
6) At this time, it is expected that the reflection of the injection beam from SRM appears at AS CCD, if SRM is aligned.
7) Adjust INJ_SM1/INJ_SM2 so that the injection beam at AS CCD can overlap to the IFO beam.
8) Confirm the beam at the output of the FI also overlaps.
---- We are here ----
9) Change the ifo configuration to the X or Y arm only.
10) Scan the crystal temperature of the 700mW NPRO in order to try to have the beating of the two beams at the PD. AS OSA may be useful to obtain the beating.
11) Once the beating is obtained, adjust INJ_SM1/INJ_SM2 such that the beating amplitude is maximized.
ELOG V3.1.3-