 Thu May 15 10:40:21 2008, steve, HowTo, General, Lisa Goggin, PhD 
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Lisa Goggin successfully defended her thesis on May, 13 2008
"A Search For Gravitational Waves from Perturbed Black Hole Ringdowns in Ligo Data"
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Mon May 19 11:49:57 2008, steve, Update, SUS, etmy oplev laser replaced
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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
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Tue May 20 09:28:42 2008, steve, Bureaucracy, SAFETY, safety traning for 40m
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| Tara Chalernsongsak, new gradstudent for K. Libbrecht was introduced to the basics of the 40m operations. |
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Thu May 22 11:21:45 2008, steve, Bureaucracy, SAFETY, early surf sudent
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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 |
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Wed May 28 14:19:47 2008, steve, Update, PSL, kaleidoscope of psl
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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
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Thu May 29 16:32:09 2008, steve, Update, SUS, etmy oplev is back
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I relayed the optics for ETMY-oplev as shown in pictures below.
The reflected beam goes directly to the qpd |
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Thu May 29 16:49:49 2008, steve, Bureaucracy, Photos, Yoichi has arrived
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Yoichi had his first 40m meeting. We welcomed him and Tobin, who is visiting, by sugar napoleons that
Bob made. |
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Wed Jun 4 10:18:52 2008, steve, Update, PSL, wedged SS beam trap
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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.
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Fri Jun 6 15:56:00 2008, steve, Bureaucracy, SAFETY, Yoichi received safety training
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| Yoichi Aso received 40m specific safety training. |
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Fri Jun 6 16:10:51 2008, steve, Update, PSL, HEPA filters are running at 100%
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| The psl HEPA filters were turned up to run at 100% to accommodate beam trap work on Tuesday, June 3, 2008 |
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Tue Jun 10 08:37:18 2008, steve, Update, PSL, beam trap is being tested
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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
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Wed Jun 11 11:45:25 2008, steve, Update, PSL, ss trap works
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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
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Fri Jun 20 17:42:48 2008, steve, Update, PSL, SS trap scattering compared to black glass trap
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Circular SS304 trap was compared to wedged black glass trap.
The measurement set up of entry 529 was changed to define polarization.
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Fri Jun 27 09:20:15 2008, steve, Frogs, PEM, dust particle count is up & alarm handler is on
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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.
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Mon Jun 30 08:59:23 2008, steve, Update, IOO, IOO-MC_DEMOD_LO is low
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| The alarm handler is beeping relentlessly: asking for help in high partical count and low demod signal |
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Tue Jul 1 09:26:33 2008, steve, Update, Computers, RFM network is down
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Tue Jul 1 10:15:22 2008, steve, Update, PSL, eventfull two days
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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. |
 Wed Jul 2 15:14:42 2008, steve, Update, General, added beam traps
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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.
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Mon Jul 7 16:30:08 2008, steve, Update, PSL, PSL-PEM 16 days trend
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This morning the laser head temp was up to 20.3C because the laser chiller was overflowing.
I removed 700 cc water.
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Tue Jul 8 08:16:56 2008, steve, Update, PSL, PMC problem
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The PMC is unhappy. PMC auto locker is not working.
DC output slider adjust has to be moved from rail to rail before it locks.
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Tue Jul 8 10:20:10 2008, steve, Update, PEM, HEPA turned on
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It is specially important to run the PSL-HEPA filters when inside counts is peaking at 30,000 counts
There is a small label at the hepa on/off switch:
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Wed Jul 9 15:04:22 2008, steve, Metaphysics, Photos, SURFs helping hands
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| Surf students are helping out with baffle cleaning. |
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Fri Jul 11 09:29:02 2008, steve, Update, PSL, the PMC still hangs up
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Morning alarms:
PMC high voltage is railing, it's auto locker is frosen
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Tue Jul 15 09:47:09 2008, steve, Update, PEM, lab temps and particles
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All air condtion units were serviced last Friday.
AC filters are trying to control our particle counts but they have no capacity to match bad Pasadena conditions.
IFO room filters at CES were really clean.
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Tue Jul 15 10:24:57 2008, steve, Update, PSL, PMC temp & pzt voltage
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The PMC pzt HV was happy with no HEPA temp stability.
Can we thermally insulate the pmc ? |
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Wed Jul 16 09:27:17 2008, steve, Update, ALARM, PSL-FSS_RMTEMP alarm is false
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Morning alarm sound is good for people who does not drink coffee.
Our 40m alarm is on every morning.
Those whom are not here in the morning thinks that this beeping sound is inspirational.
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Thu Jul 17 08:30:15 2008, steve, Update, PSL, PMC relocked manually
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The PMC pzt HV and the servo gain adj. are railing at max this morning
Why is it on the decreasing side of FSS_RTTEMP slope? |
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Mon Jul 21 10:00:42 2008, steve, Update, PEM, ifo room temp
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Five years of temp trend with 5 C fluctuation. The campus chilled water supply was upgraded ~ 1 year ago.
I requested our thermostats to be calibrated. |
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Mon Jul 21 15:52:22 2008, steve, Bureaucracy, SAFETY, fire alarms test
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The fire alarm test and evacuation drill was successfully completed at 13:45 Wednesday, July 16, 2008
Everybody was on time for the 40m meeting. |
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Tue Jul 22 09:24:17 2008, steve, Update, PSL, laser power
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| Laser power reality of 120 days |
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Tue Jul 22 16:50:09 2008, steve, Metaphysics, Environment, professorial clean up of work bench
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Atm1: is showing the spiritual satisfaction after work bench clean up by the professor himself.
Atm2: some items are still waiting to be placed back to their location |
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Mon Aug 4 12:12:20 2008, steve, Configuration, VAC, the ifo is at atm
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The 40m vac envelope was vented this morning.
P1 is at 760 Torr |
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Tue Aug 5 10:23:00 2008, steve, Update, SUS, earthquake and venting effects
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atm 1, EQ
atm 2, vent 7 days later: venting kicks optic into place to be free,
PRM: LR magnet gets pushed in and it is stocked, side in free |
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Wed Aug 13 17:00:59 2008, steve, Configuration, SUS, BS sat amp removed
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The PRM sat amp is broken. Ben is working on it.
The BS sat amp was removed from the BS sus and it is used with the PRM in
order to damp it for wire stand-off alignment. |
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Thu Aug 14 10:26:45 2008, steve, HowTo, SUS, sus cable pin cheater for out of vac damping
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The 40m D25 vacuum feed troughs give you a mirror image pin count.
Sus damping outside of the vacuum envelope require this cheater cable where
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Thu Aug 14 11:39:06 2008, steve, Update, PEM, particle counter is out of order
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| The 40m ifo paricle counter sensor failed last night. |
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Fri Aug 15 14:12:31 2008, steve, Bureaucracy, SAFETY, safety glasses required
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The MOPA shutter is opened,
the PSL enclosure is switched to bypass mode,
manual block removed from PMC,
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Fri Aug 15 19:32:49 2008, steve, Configuration, VAC, pumpdown complete
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I have just reached vacuum normal. The maglev peaked at 49.8C body temp with aux fan on at 3.2 Torr
cc1 1e-4Torr
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Mon Aug 18 09:19:55 2008, steve, Summary, VAC, 11 days at atm
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It took 11 days to fix earth quake triggered sus problems of ITMX, SRM and PRM
Only ITMX north and BSC north vac doors were removed.
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Thu Aug 21 10:24:20 2008, steve, Configuration, SAFETY, laser safe mode condition
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The MOPA and PSL shutters are closed.
Manual beam blocks are in place.
Enclosure interlock is enabled.
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Thu Aug 21 16:28:59 2008, steve, Configuration, SAFETY, safety glasses required
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I just opened the MOPA shutter so PA is warming up.
High power beam path is cleared and laser safety glasses required. |
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Fri Aug 22 16:06:29 2008, steve, Update, PEM, particle counter replaced, flowbenches & HEPAs checked
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MetOne #2 counter was swapped in (on the top of IOC, facing SW direction, at ~75 deg upwards)
with channel one size 0.3 micron and channel two size 1.0 micron.
Sampling time was reduced from 60s to 6 sec at 0.1 cf/min at 25 min rate.
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Mon Aug 25 10:23:53 2008, steve, HowTo, General, cable killer
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Rack 1Y7 double violation:
BNC cables left to be jammed by door
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Mon Aug 25 10:51:06 2008, steve, Update, PSL, psl headtemp is coming down
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The laser water cooler was overflowing this morning.
I removed 500 cc water from the chiller.
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Tue Aug 26 09:58:59 2008, steve, Omnistructure, COC, ETMX is #03
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| This is the picture of ETMX from the upper south west viewport |
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Tue Aug 26 15:06:16 2008, steve, Configuration, VAC, rga scan
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Pumpdown 66 PRM-maglev vac normal -day 11
short form: pd66PRM-m-d11 |
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Fri Aug 29 15:01:45 2008, steve, Update, PSL, MOPA_HTEMP in increasing
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The laser chiller temp is 21.9C ( it should be 20.0C )
Control room temp 73F ok, no obvious block
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Tue Sep 2 10:09:03 2008, steve, Update, PSL, head temp is cooling down
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The chiller was over flowing this morning.
800 cc of water was removed.
PSL-126MOPA_HTEMP peaked at 20.7 C (normal is 18.7 C) |
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Fri Sep 5 08:34:03 2008, steve, Update, PSL, MZ locked
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The MC is happy.
The MZ can be locked if you move the slider by hand. |
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Fri Sep 5 10:36:34 2008, steve, Update, PEM, thermostate setting changed
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Some one changed the thermostat (old control room ) setting behind 1Y6 from 73 to 79F
It should be in the elog.
The temp changed from freezing 20 to sunny 25 C |