| ID |
Date |
Author |
Type |
Category |
Subject |
|
12
|
Wed Oct 24 08:58:09 2007 |
steve | Other | PSL | laser headtemp is up |
C1:PSL-126MOPA_HTEMP is 19.3C
Half of the chiller's air intake was covered by loose paper |
| Attachment 1: htempup.jpg
|
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17
|
Fri Oct 26 09:10:17 2007 |
steve | Routine | PEM | PEM &PSL trend |
The fires are out, lab particle counts are up.
Psl HEPAs are at 100% and mobel HEPAs are just turned on
20 days plot and 5 hrs plot below |
| Attachment 1: counts&psl.jpg
|
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| Attachment 2: 5dcounts.jpg
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23
|
Mon Oct 29 09:16:31 2007 |
steve | Routine | VAC | the rga is back |
We had no filament current since last power glitch of Oct. 8, 2007
First I thought that the filament was lost, but it was only bad contact.
The rga head pins were oxidized. Rga was turned back on last Friday.
It's temp is 55.3C normal |
| Attachment 1: rgaisback.jpg
|
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24
|
Mon Oct 29 09:46:50 2007 |
steve | Routine | VAC | vac & pem trend |
Pumpdown 64 pumped by maglev for 125 days
pd64-m-d125
Rob, can you tell me, when did the fire start on this plot? |
| Attachment 1: pd64md125.jpg
|
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44
|
Thu Nov 1 09:17:27 2007 |
steve | Routine | VAC | vent 64 |
Yesterday before vent I could not lock MC, therfore I could not measure the
transmitted power at MC2
The vent went well. We had lots of help.
We could not find the Nikon D40
PLEASE BORROW THINGS when taking them away
and bring them back promtly.
The laser was turned off for better visibility.
I see clean room frorks laying around here and there.
Please put them away so we do not carry excess particles into the chamber. |
| Attachment 1: vent64.jpg
|
|
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57
|
Fri Nov 2 08:59:30 2007 |
steve | Bureaucracy | SAFETY | the laser is ON |
| The psl laser is back on ! |
|
65
|
Tue Nov 6 09:14:37 2007 |
steve | Summary | VAC | pump down 65 |
8 hr plot,
precondition: 5 days at atm,
vent objective: drag wiping mc1, mc2 & mc3 accomplished,
hardware changes: IOO access connector, mc2 chamber door south & west
were removed and reinstalled
pump down mode: slow to avoid steering up dust
One roughing pump was used with closed down valve position in the first 4 hrs
Andrey was very helpful |
| Attachment 1: pd65.jpg
|
|
|
66
|
Tue Nov 6 09:45:22 2007 |
steve | Summary | SUS | vent sus trend |
The mc optics dragwippings were done by locking optics by eq stops and rotating-moving
cages so access were good. This technic worked well with mc1 & mc2
MC3 osems were reoriented only. |
| Attachment 1: ventsustrend.jpg
|
|
|
76
|
Wed Nov 7 09:38:01 2007 |
steve | Update | VAC | rga scan |
| pd65-m-d2 at cc1 6e-6 torr |
| Attachment 1: pd65d2.jpg
|
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|
81
|
Wed Nov 7 16:07:03 2007 |
steve | Update | PSL | PSL & IOO trend |
1.5 days of happy psl-ioo with litle bumps in C1:PSL-126MOPA_HTEMP |
| Attachment 1: psl1.5dtrend.jpg
|
|
|
83
|
Thu Nov 8 11:40:21 2007 |
steve | Update | PEM | particle counts are up |
I turned up the psl HEPA filter to 100%
This 4 days plot shows why |
| Attachment 1: pslhepaon.jpg
|
|
|
88
|
Fri Nov 9 09:37:55 2007 |
steve | Update | PSL | head temp hiccup |
Just an other PSL-126MOPA_HTEMP hiccup.
The water chiller is at 20.00C |
| Attachment 1: headtempup.jpg
|
|
|
113
|
Fri Nov 16 18:46:49 2007 |
steve | Bureaucracy | PSL | MOPA was turned off & on |
The "Mohana" boys scouts and their parents visited the 40m lab today.
The laser was turned off for their safety.
It is back on ! |
|
114
|
Mon Nov 19 14:19:25 2007 |
steve | Omnistructure | PEM | jackhammer |
The construction personal successfully jackhemmered a fence around the "Drever's parking slot"
There is no parking space available close by |
| Attachment 1: jackhammer.jpg
|
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| Attachment 2: jackhammer2.jpg
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115
|
Mon Nov 19 14:32:10 2007 |
steve | Bureaucracy | SAFETY | grad student safety training |
John Miller and Alberto Stochino has received the 40m safety bible.
They still have to read the laser operation manual and sign off on it. |
|
122
|
Mon Nov 26 10:17:31 2007 |
steve | Omnistructure | SUS | etmy sus damping restored |
20 days plot is showing etmy loosing damping 4 times.
I zoomed in with each event. Three of them could of been triggered
by garbage loading just outside. However attachment 2 plot demonstrating that small earthquake or seismic event
did not tripped etmy damping.
The fourth event was preceded by a 4-5 hrs of continous rise of the rms motion at C1:SUS-ETMY_LLPD_VAR |
| Attachment 1: etmyrms20d.jpg
|
|
| Attachment 2: etmyrmseq.jpg
|
|
|
129
|
Wed Nov 28 08:47:29 2007 |
steve | Omnistructure | VAC | rga is out of order |
The rga is not working since Nov 10
The controller is broken.
pd65-m-d23 |
| Attachment 1: pd65d23.jpg
|
|
|
200
|
Wed Dec 19 11:31:01 2007 |
steve | Omnistructure | PEM | aircond filter maintenance |
Jeff is working on all air condiontion units of the 40m lab
This we do every six months. |
| Attachment 1: acfilters6m.jpg
|
|
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203
|
Wed Dec 19 16:40:12 2007 |
steve | Update | SAFETY | laser safety glasses measured |
I measured the coarse transission at 1064nm of the 40m safety glasses today.
12 pieces of UVEX # LOTG-YAG/CO2 light green, all plastic construction, ADSORBANT
3 pieces of 6KG5, Scott colored filter glass type,
individual prescription glasses: alan, bob, ben, jay and steve
7 pieces of dual waveleght glasses
These glasses showed 0.00mW transmission out of 170mW Crysta Laser 1064 |
|
220
|
Thu Jan 3 08:53:55 2008 |
steve | Update | SUS | etmy vs etmx |
Rana have corrected sus gain damping setting of ETMY 8 days ago
gain settings: pos, pit, yaw & sd
etmx: 4,2,2,& -16
etmy: 4,2,2,& 50 |
| Attachment 1: sus.jpg
|
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221
|
Thu Jan 3 09:12:59 2008 |
steve | Update | PSL | MZ servo |
Here is MZ trend for one year and 40 days.
Now days it runs out of range on the low side.
This is the weakest link in the psl today. |
| Attachment 1: mz1y.jpg
|
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| Attachment 2: mz40d.jpg
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222
|
Thu Jan 3 09:55:11 2008 |
steve | Update | SUS | etmy sus damping restored |
| ETMY watch dog was lost at midnight |
| Attachment 1: etmy12h.jpg
|
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225
|
Fri Jan 4 08:42:03 2008 |
steve | Update | SUS | etmy trips again |
ETMY sus damping tripped at 6am this morning
It was reset. We should put an accelerometer to the south end to see
the garbage dumping effect. |
| Attachment 1: etmy20m.jpg
|
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| Attachment 2: etmy120s.jpg
|
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| Attachment 3: etmysenV.jpg
|
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226
|
Mon Jan 7 09:01:39 2008 |
steve | Update | SUS | BS sus damping restored |
| The BS sus damping was lost at 8am Sunday morning. |
| Attachment 1: bssdl.jpg
|
|
|
232
|
Thu Jan 10 10:38:02 2008 |
steve | Update | SUS | etmy 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
|
|
| Attachment 2: sustrend16d.jpg
|
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233
|
Thu Jan 10 12:08:23 2008 |
steve | Update | SUS | why did the BS move? |
|
| Attachment 1: bshopped.jpg
|
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235
|
Thu Jan 10 15:04:04 2008 |
steve | Update | SUS | illuminator 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
|
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|
237
|
Mon Jan 14 14:41:09 2008 |
steve | Update | SUS | etmy 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
|
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|
254
|
Wed Jan 23 09:27:55 2008 |
steve | Update | | etmy sus damping restored |
| Seismis event trips etmy |
| Attachment 1: etmysus.jpg
|
|
|
255
|
Wed Jan 23 11:41:06 2008 |
steve | Update | PEM | sulfur 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 |
steve | Update | PEM | the 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 |
steve | Update | PEM | burned 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 |
steve | Update | PEM | IST building construction continoues |
| The bulldosers at work |
| Attachment 1: seismic8d.jpg
|
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| Attachment 2: seisioo.jpg
|
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308
|
Mon Feb 11 14:24:19 2008 |
steve | Update | PEM | more 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
|
|
|
322
|
Tue Feb 19 10:14:13 2008 |
steve | Update | VAC | rga 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 |
steve | Update | PSL | laser head temp is up |
MOPA head temp is running at 20.3C now
Nomally it is at 18.5C |
| Attachment 1: htempup.jpg
|
|
|
326
|
Wed Feb 20 16:24:37 2008 |
steve | Update | PSL | the 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
|
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|
327
|
Thu Feb 21 09:56:26 2008 |
steve | Update | PSL | the 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
|
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|
335
|
Fri Feb 22 14:45:06 2008 |
steve | Update | MOPA | laser 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
|
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351
|
Mon Mar 3 09:25:33 2008 |
steve | Update | VAC | rga 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
|
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| Attachment 2: cc1.jpg
|
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352
|
Mon Mar 3 13:58:10 2008 |
steve | Update | Computers | RFM Network are down |
| The CODAQ_RFNETWORK are down, except C1SUSVME & AWG |
|
365
|
Fri Mar 7 19:04:39 2008 |
steve | Omnistructure | PSL | laser 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 |
steve | Update | VAC | tp2 's drypump replaced |
| The fore pump of tp2 was replaced at fore line pressure 998m Torr |
|
388
|
Fri Mar 21 09:02:03 2008 |
steve | Update | VAC | tp 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 |
steve | Update | General | reflectivity 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
|
|
| Attachment 2: bg12refsetup.pdf
|
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|
417
|
Mon Apr 7 18:58:49 2008 |
steve | Update | General | reflectivity 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
|
|
|
418
|
Tue Apr 8 09:08:54 2008 |
steve | Configuration | PEM | weather 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
|
|
|
423
|
Thu Apr 17 15:00:59 2008 |
steve | Update | VAC | vac 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 |
steve | Configuration | SAFETY | Safety 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
|
|
| Attachment 2: mcrefl3.JPG
|
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|
450
|
Fri Apr 25 15:44:21 2008 |
steve | Update | PSL | scattering 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
|
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| Attachment 4: viewfmirror.pdf
|
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| Attachment 5: viewfbgtrap.pdf
|
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| Attachment 6: wpnmount.pdf
|
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