| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1565
|
Fri May 8 15:40:44 2009 |
pete | Update | Locking | progressively weaker locks | the align script was run after the third
lock here. it would have been interesting
to see the arm powers in a 4th lock |
|
|
1566
|
Fri May 8 16:03:31 2009 |
Jenne | Update | PEM | Update on Jenne's Filtering Stuff | To include the plots that I've been working
on in some form other than on my computer,
here they are: |
|
|
1567
|
Fri May 8 16:29:53 2009 |
rana | Update | Computer Scripts / Programs | elog and NDS | Looks like the new NDS client worked. Attached
is 12 hours of BLRMS. |
|
|
1568
|
Sat May 9 00:15:21 2009 |
Yoichi | Update | PSL | Laser head temperature oscillation | After the laser cooling pipe was unclogged,
the laser head temperature has been oscillating
in 24h period.
|
|
|
1569
|
Sat May 9 02:20:11 2009 |
Jenne | Update | PSL | Laser head temperature oscillation | [quote]After the laser cooling pipe was unclogged,
the laser head temperature has been oscillating
in 24h period.
|
|
|
1570
|
Sat May 9 15:19:10 2009 |
rana | Update | PSL | Laser head temperature oscillation | This is 8 days of 10-minute trend.
DTEC is just the feedback control signal |
|
|
1571
|
Sun May 10 13:34:32 2009 |
caryn | Update | PEM | Unplugged Guralp channels | I unplugged Guralp EW1b and Guralp Vert1b
and plugged in temp sensors temporarily.
Guralp NS1b is still plugged in. |
|
|
1572
|
Sun May 10 13:41:17 2009 |
steve | Update | VAC | ETMY damping restored, VC1 opened | ETMY damping restored.
Cryo interlock closed VC1 ~2
days ago. P1 is 6.3 mTorr. Cryo temp 12K |
|
|
1573
|
Mon May 11 11:49:20 2009 |
steve | Update | PSL | MOPA cooling water lines are backwards | [quote]This is 8 days of 10-minute trend.
DTEC is just the feedback control signal |
|
|
1574
|
Mon May 11 12:25:03 2009 |
josephb,Alex | Update | Computers | fb40m down for patching | The 40m frame builder is currently being
patched to be able utilize the full 14 TB
of the new raid array (as opposed to being |
|
|
1575
|
Tue May 12 01:11:55 2009 |
Yoichi | Update | LSC | DARM response (DC Readout) | I measured the DARM response with DC readout.
This time, I first measured the open loop |
|
|
1576
|
Tue May 12 01:22:51 2009 |
Yoichi | Update | LSC | Arm loss | Using the armLoss script (/cvs/cds/caltech/scripts/LSC/armLoss),
I measured the round trip loss (RTL) of the
arms.
|
|
|
1577
|
Tue May 12 15:22:09 2009 |
Yoichi | Update | LSC | Arm Finesse | [quote]
It looks as if the measured DARM response
is skewed by an extra low pass filter at |
|
|
1578
|
Tue May 12 17:26:56 2009 |
pete | Update | oplevs | etmy oplev quad was bad | Pete, Rob
After looking at some oplev noise
spectra in DTT, we discovered that the ETMY |
|
|
1579
|
Wed May 13 02:53:12 2009 |
rob | Summary | lore | Channel Hopping: That ancient enemy (MC problems) | We were stymied tonight by a problem which
began late this afternoon. The MC would
periodically go angularly unstable, breaking |
|
|
1580
|
Wed May 13 03:05:13 2009 |
pete | Update | oplevs | etmy oplev quad was bad |
|
|
|
1581
|
Wed May 13 12:41:14 2009 |
josephb | Update | Cameras | Timing and stability tests of GigE Camera code | At the request of people down at LLO I've
been trying to work on the reliability and
speed of the GigE camera code. In my |
|
|
1582
|
Wed May 13 14:43:29 2009 |
rob | Summary | lore | Channel Hopping: That ancient enemy (MC problems) |
|
|
|
1583
|
Wed May 13 21:15:04 2009 |
rana | Summary | SUS | Channel Hopping: That ancient enemy (MC problems) | The MC side problem could also be the side
tramp unit problem. Set the tramp to 0 and
see if that helps. |
|
|
1584
|
Thu May 14 00:15:39 2009 |
rob | Summary | SUS | Channel Hopping: That ancient enemy (MC problems) | [quote]The MC side problem could also be the
side tramp unit problem. Set the tramp to
0 and see if that helps.[/quote]
|
|
|
1585
|
Thu May 14 02:36:05 2009 |
pete | Update | Locking | unstable IFO | It seems that the MC3 problem is intermittent
(one-day trend attached). I tried to
take advantage of a "clean MC3" |
|
|
1586
|
Thu May 14 15:28:28 2009 |
steve | Summary | SUS | April 24 earthquake effect on MC2 | [quote][quote]The MC side problem could also
be the side tramp unit problem. Set the tramp
to 0 and see if that helps.[/quote]
|
|
|
1587
|
Thu May 14 16:07:20 2009 |
pete | Summary | SUS | Channel Hopping: That ancient enemy (MC problems) | [quote][quote]The MC side problem could also
be the side tramp unit problem. Set the tramp
to 0 and see if that helps.[/quote]
|
|
|
1588
|
Fri May 15 00:02:34 2009 |
pete | Update | SUS | ETMX coils look OK | I checked the four rear coils on ETMX by
exciting XXCOIL_EXC channel in DTT with amplitude
1000@ 500 Hz and observing the oplev PERROR |
|
|
1589
|
Fri May 15 14:05:14 2009 |
Dmass | HowTo | Computers | How To: Crash the Elog | The Elog started crashing last night. It
turns out I was the culprit, and whenever
I tried to upload a certain 500kb .png picture, |
|
|
1590
|
Fri May 15 16:47:44 2009 |
josephb | Update | Cameras | Improved camera code | At Rob's request I've added the following
features to the camera code.
The camera server, which can be started |
|
|
1591
|
Fri May 15 17:30:00 2009 |
rob | Update | LSC | arms, coils, locks | This is the two arms locked, for an hour.
No integrator in either loop, but from this
it looks like ETMY may have a bigger length2angle |
|
|
1592
|
Sat May 16 16:20:33 2009 |
rob | Update | LSC | arms, coils, locks, #2 |
|
|
|
1593
|
Sun May 17 14:35:52 2009 |
Yoichi | Update | VAC | VC1 opened | I found the VC1 was closed and the pressure
was 4.5e-3 torr.
I tweaked the optical sensor (cryopump temperature), |
|
|
1594
|
Sun May 17 20:50:38 2009 |
rob | Omnistructure | Environment | mag 5.0 earthquake in inglewood | 2009 May 18 03:39:36 UTC
Details
|
|
|
1595
|
Sun May 17 21:45:40 2009 |
rob | Update | ASC | ITMX oplev centered | |
|
|
1596
|
Sun May 17 23:22:19 2009 |
rana | Update | Environment | seisBLRMS for the past 3 weeks | Looks like Chris Wipf's fix of using fclose
worked for the NDS client.
The attached plot shows the minute trend |
|
|
1597
|
Mon May 18 01:54:35 2009 |
rana | Update | PEM | Unplugged Guralp channels | To see if Caryn's data dropouts were happening,
I looked at a trend of all of our temperature
channels. Looks OK now.
|
|
|
1598
|
Mon May 18 02:18:17 2009 |
rana | Summary | SEI | Using STACIS w/ a good position sensor | [FONT=Verdana]WE turned off STACIS a few years
ago because we noticed that it was causing
noise below a few Hz and making
|
|
|
1599
|
Mon May 18 10:06:56 2009 |
caryn | Update | PEM | Temp sensor | [quote]To see if Caryn's data dropouts were
happening, I looked at a trend of all of
our temperature channels. Looks OK now.
|
|
|
1600
|
Mon May 18 15:31:11 2009 |
rana | Update | PEM | Temp sensor | [quote]Picture of cooler for posterity is
attached[/quote]
|
|
|
1601
|
Mon May 18 19:44:52 2009 |
rana, steve | Configuration | VAC | Cryo Pump turned off and valved off: 1 beer can only | I was seeing some excess noise in the ETMY
oplev yaw and so we turned off the cryo and
restarted c1vac2 to get the turbo pump channels |
|
|
1602
|
Mon May 18 20:16:20 2009 |
rana | Configuration | VAC | not it | There was essentially no change in the ETMY
oplev spectrum with the cryo off!
|
|
|
1603
|
Mon May 18 21:34:18 2009 |
rana | Configuration | SUS | ETMY f2pRatio script run | Now that the ETMY optical lever is not so
bad, I ran the f2pRatio script and it seems
to have worked.
|
|
|
1604
|
Tue May 19 09:34:29 2009 |
steve | Configuration | VAC | IFO is not pumped & CRYO is being regenerated | Morning Vacuum condition: IFO is not being
pumped, P1 pressure is 1.8 mTorr and rising
(see P1 pressure plot of 100 min ).
|
|
|
1605
|
Tue May 19 12:30:41 2009 |
rob | Configuration | SUS | ETMY f2pRatio script run | [quote]Now that the ETMY optical lever is
not so bad, I ran the f2pRatio script and
it seems to have worked.
|
|
|
1606
|
Tue May 19 15:54:29 2009 |
Jenne | Update | PEM | More Plots for the S5 H1:DARM Wiener Filtering.... | Even more plots for the Wiener filtering!
We have a set of spectrograms, which
show (in color) the amplitude spectrum, at |
6x |
|
1607
|
Tue May 19 15:57:07 2009 |
steve | Update | IOO | MC2 damping restored after EQ | Earthquake mag 4.0 at Lennox, Ca
trips MC2 watchdogs
http://quake.usgs.gov/recenteqs/Quakes/ci10411545.html |
|
|
1608
|
Tue May 19 16:08:03 2009 |
rana | Summary | SEI | EUCLID | From Stuart Aston, I've attached a picture
of the EUCLID position sensor: |
|
|
1609
|
Tue May 19 16:18:45 2009 |
steve | Configuration | VAC | IFO pressure is 4.2e-7 Torr with CRYO pump | [quote]Morning Vacuum condition: IFO is not
being pumped, P1 pressure is 1.8 mTorr and
rising (see P1 pressure plot of 100 min ).
|
|
|
1610
|
Wed May 20 01:41:19 2009 |
pete | Update | VAC | cryopump probably not it | I found some neat signal analysis software
for my mac (http://www.faberacoustical.com/products/),
and took a spectrum of the ambient noise |
|
|
1611
|
Wed May 20 01:53:48 2009 |
rob, pete | Update | Locking | violin mode filters in drstep_bang | Recently the watch script was having difficulty
grabbing a lock for more than a few seconds.
Rob discovered that the violin notch filters |
|
|
1612
|
Wed May 20 09:55:18 2009 |
steve | Update | PEM | oplev servos turned off | All oplevs servos turned off to protect
our suspentions from vibration due to drilling
and pounding in CES high bay area. |
|
|
1613
|
Wed May 20 10:43:17 2009 |
steve | Omnistructure | Environment | accelerometers sensitivity |
|
|
|
1614
|
Wed May 20 16:03:52 2009 |
steve | Omnistructure | Environment | using OSEMs to look at seismic activity | Rana suggested using OSEM sensing voltages
as guide lines to look seismic activity.
As you see todays drilling and tumping |
|