| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1415
|
Sun Mar 22 22:39:24 2009 |
rana | Summary | LSC | Calibration of the ITM and ETM Actuation | I used the following procedure to calibrate
the ITMX actuation signal.
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|
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1416
|
Sun Mar 22 22:47:58 2009 |
rana | Update | DMF | seisBLRMS compiled but still dying | Looks like seisBLRMS was restarted ~1 AM Friday
morning but only lasted for 5 hours. I just
restarted it on megatron;
|
|
|
1417
|
Sun Mar 22 23:16:41 2009 |
rana | DAQ | Computer Scripts / Programs | tpman restart | Could get testpoints but couldn't start excitations.
Restarted tpman on daqawg. Works now.
|
|
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1418
|
Mon Mar 23 15:50:44 2009 |
rana | Configuration | LSC | filters deleted, lsc rebooted | The LSC time had gone too high. I deleted
~20 filters and rebooted. CPU time came down
to 50 usec. |
|
|
1419
|
Tue Mar 24 03:05:25 2009 |
Yoichi | Update | Locking | Locking tonight | MC1 issue:
The MC1 seems to be drifting still. I found
it was off from the SUS drift-mon reference |
|
|
1420
|
Tue Mar 24 09:04:02 2009 |
steve | Update | SUS | 4.8 mag earthquake | SRM, ITMX, ETMX, ITMY and ETMY lost damping
at 4:55am this morning from 4.8 magnitude
earthquake. |
|
|
1421
|
Tue Mar 24 13:10:07 2009 |
Alberto | Configuration | PSL | new mirror installed on the AP table | New flipping mirror installed on the AP
table on the beam path to the REFL199 PD.
If you're missing the double demod |
|
|
1422
|
Tue Mar 24 13:54:49 2009 |
Jenne | Update | SUS | Op Levs Centered | ITMX, ITMY, BS, SRM, PRM op levs were all
recentered. ETM's looked okay enough
to leave as-is. |
|
|
1423
|
Tue Mar 24 19:55:24 2009 |
Jenne | Update | LSC | New PO DC | [Rana, Jamie, Jenne]
SPOB DC hasn't been so good lately,
so we installed a new PO DC PD on the PO |
|
|
1424
|
Tue Mar 24 23:23:05 2009 |
rana | Update | LSC | New PO DC | We also found that the SPOB RF cable was going
through a splitter before going into the
SPOB demod board. The other
|
|
|
1425
|
Wed Mar 25 01:37:35 2009 |
rana, yoichi | Summary | IOO | No Reference Cavity Required | We were wondering if we need to have a reference
cavity. One possible reason to have one is
to reduce the free running
|
|
|
1426
|
Wed Mar 25 04:18:28 2009 |
Yoichi | Update | Locking | Tuesday Locking | After the new PO_DC PD was installed, I tweaked
several gains to make the locking scripts
work right.
|
|
|
1427
|
Wed Mar 25 09:55:45 2009 |
steve | Update | IOO | glitching sensors of MC | SUS-MC1_SENSOR_SIDE and SUS-MC2_SENSOR_UL
are glitching
Yesterday's 4.8mag earthquake at |
|
|
1428
|
Wed Mar 25 17:22:58 2009 |
Yoichi | Update | IOO | MC lock without FSS | I made 40k:4k passive filter in a POMONA box
and connected it to IN1 (not TEST IN1) of
the FSS box.
|
|
|
1429
|
Wed Mar 25 20:41:43 2009 |
Jenne | Update | IOO | Mode Cleaner Servo Board Transfer Functions (to be updated) | When all things fail (netgpibdata.py is
giving me weird data. When I plot the
data it has saved from the 4395A, it's some |
|
|
1430
|
Thu Mar 26 00:45:24 2009 |
Jenne | Update | IOO | Mode Cleaner Servo Board Transfer Functions (to be updated) |
|
|
|
1431
|
Thu Mar 26 04:01:24 2009 |
Yoichi | Update | PSL | FSS Open Loop Gain | Yoichi, Peter, Jenne
Attached is the open loop transfer function |
|
|
1432
|
Thu Mar 26 04:09:38 2009 |
Yoichi | Update | IOO | Single X arm lock spectra with different MC lock schemes | The attached plots show MC_F, FSS_FAST_F and
XARM IN/OUT spectra with different MC locking
modes.
|
|
|
1433
|
Thu Mar 26 04:27:26 2009 |
Yoichi | Update | Locking | 3.8kHz peak as a function of the arm power | During the power ramp-up, I actuated CARM
using ETMs and measured the transfer functions
to the PO_DC at several arm powers.
|
|
|
1434
|
Thu Mar 26 09:08:18 2009 |
Kakeru | Update | oplevs | arm cavity oplev calibration | I uploaded a document about my oplev calibration.
/cvs/cds/caltech/users/kakeru/oplev_calibration/oplev.pdf
|
|
|
1435
|
Fri Mar 27 02:40:06 2009 |
pete | Summary | IOO | MC glitch investigation | Yoichi, Pete
The MC loses lock due to glitches
in the MC1 coils.
We do |
|
|
1436
|
Fri Mar 27 02:50:54 2009 |
Yoichi | Update | Locking | DD demodulation phase suspicious | I noticed that the gain of PD6_Q (before the
phase rotation) was 0 whereas PD6_I gain
was 15.
|
|
|
1437
|
Fri Mar 27 15:05:42 2009 |
Yoichi | Update | IOO | MC glitch investigation | Attached plots are the result of the
MC1 trend measurement.
See the
attachment #1. The first two plots show the |
|
|
1438
|
Fri Mar 27 17:52:16 2009 |
Yoichi | Update | IOO | MC glitch investigation | Per Rob's suggestion, I put the probes
across the output resistors of the bias current
buffers instead of measuring the output voltage |
|
|
1439
|
Sun Mar 29 13:44:27 2009 |
steve | Update | SUS | ETMY sus damping restored | ETMY sus damping was found to be tripped.
It was retored.
All fluorecent light were turned |
|
|
1440
|
Sun Mar 29 17:54:41 2009 |
Yoichi | Update | SUS | MC1 drift investigation continued | The attached plots show the trend of the MC
OSEM signals along with the voltages across
the output resistors of the bias current |
|
|
1441
|
Mon Mar 30 09:07:22 2009 |
rana | Update | SUS | MC1 drift investigation continued | [COLOR=chocolate]Maybe we can temporarily
just disconnect the bias and just use the
SUS sliders for bias if there's enough range?[/COLOR] |
|
|
1442
|
Mon Mar 30 12:29:17 2009 |
Yoichi | Configuration | | MC1 glitches not seen during the weekend | The attached is the MC trend for the past
12 hours.
There is no MC1 glitches in the OSEM signals. |
|
|
1443
|
Mon Mar 30 12:46:36 2009 |
Yoichi | Configuration | IOO | IOO QPDs were missing the beam | When I re-locked the MC, I wanted to check
the trend of the IOO QPDs to see if the input
beam pointing has changed.
|
|
|
1444
|
Mon Mar 30 13:29:40 2009 |
Yoichi | Update | SUS | MC1 drift investigation continued | [quote][COLOR=chocolate]Maybe we can temporarily
just disconnect the bias and just use the
SUS sliders for bias if there's enough range?[/COLOR][/quote]
|
|
|
1445
|
Mon Mar 30 15:51:27 2009 |
steve | Update | Electronics | HP4291A left the lab to be repaired | Eric Gustafson is handling the old HP4291A
rehabilitation. Tarac picked both units up
today. |
|
|
1446
|
Mon Mar 30 17:02:46 2009 |
Yoichi | Configuration | General | AP OSA aligned | I aligned the AP OSA, which had been mis-aligned
for a while. |
|
|
1447
|
Tue Mar 31 09:42:32 2009 |
steve | Update | PEM | ETMY sus damping restored again | The Caltech gasoline storage tank is being
upgraded.
They are jack hammering and digging |
|
|
1448
|
Wed Apr 1 10:22:13 2009 |
steve | Update | VAC | RGA logging is working | Thanks to Joe B who made the SRS RGA working
with linux
Last data file logged at 2008 Oct |
|
|
1449
|
Wed Apr 1 15:47:48 2009 |
Yoichi | Update | Locking | 3.8kHz peak looks like a real optical response of the interferometer | Yoichi, Peter
To see where the 3.8kHz peak comes from, |
|
|
1450
|
Wed Apr 1 16:14:36 2009 |
Yoichi | Update | Locking | 3.8kHz peak does not change with SRC offset | Yoichi, Peter
We suspected that maybe the 3.8kHz peak is |
|
|
1451
|
Wed Apr 1 23:18:07 2009 |
rana, koji | Summary | IOO | No Reference Cavity Required | Koji sent us a note about our "No Reference
Cavity Required" entry. I thought that it
nicely summarizes the
|
|
|
1452
|
Fri Apr 3 10:01:50 2009 |
steve | Update | VAC | rgascan with temp plot | Rga scan of day 231 since pumpdown pd66-m-d231
m stands for maglev pumping speed,
vacuum normal condition of valves, |
|
|
1453
|
Fri Apr 3 14:52:38 2009 |
Jenne | Omnistructure | PEM | Guralp is finally back! | After many, many "it'll be there in
2 weeks" from the Guralp people, our
seismometer is finally back! |
|
|
1454
|
Fri Apr 3 17:20:05 2009 |
Yoichi | Update | Locking | The 3.8kHz peak seems like the DARM RSE (not 100% sure though) | Yoichi, Kentaro,
Last night, we took several measurements |
|
|
1455
|
Mon Apr 6 19:09:15 2009 |
Jenne | Update | PEM | Old Guralp is hooked back up to the ADC | Old Guralp is hooked back up, the new one
is sitting next to it, disconnected for now. |
|
|
1456
|
Mon Apr 6 21:50:43 2009 |
rana | Update | LSC | Arm Locking via pushing MC2 | Inspired by our 'No Refcav' scheme here, I
was inspired to re-explore the idea of locking
the
|
|
|
1457
|
Tue Apr 7 21:39:57 2009 |
Yoichi | Configuration | Computers | LSC code recompiled with a fix for denormalization problem | This is not my work but I will put it for
the record.
|
|
|
1458
|
Wed Apr 8 02:47:42 2009 |
Yoichi | Update | Locking | Locking status | This is a summary of activities in the last
few nights, although there is not much progress.
|
|
|
1459
|
Wed Apr 8 09:36:20 2009 |
steve | Configuration | VAC | valve condition changed to BG to calibrate the RGA | Vacuum
normal valve condition was changed to accommodate
SRS-RGA calibration. |
|
|
1460
|
Wed Apr 8 18:18:33 2009 |
rana | Configuration | Computers | LSC code recompiled with a fix for denormalization problem | Below is the link to the anti-denormalization
technique that Rolf and Alex implemented
at the sites,
|
|
|
1461
|
Wed Apr 8 18:46:50 2009 |
rana | Configuration | General | DMF, SVN, x2mc, and matlab | While waiting for the installation of the
32-bit Matlab 2009a to finish, I tried updating
our seisBLRMS.m code. |
|
|
1462
|
Thu Apr 9 11:27:19 2009 |
steve | Update | VAC | vac gauge reading problem | Cold cathode gauge CC4 is reading
normal.
CC1 is glitching, it is probably |
|
|
1463
|
Thu Apr 9 12:23:49 2009 |
pete | Update | Locking | tuning ETM common mode | Pete, Yoichi
Last night, we put the IFO in FP
Michelson configuration. We took transfer |
|
|
1464
|
Thu Apr 9 20:56:12 2009 |
Yoichi | HowTo | General | Restore the alignment. Write elog entries. | I often find that the mirrors are left mis-aligned
(like in X-arm mode) when I come in for the
locking, including tonight.
|
|