ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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 |
|
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 |
|
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 |
 |
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.
|
|
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 |
|
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
|
|
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.
|
|
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.
|
 |
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 |
|
1430
|
Thu Mar 26 00:45:24 2009 |
Jenne | Update | IOO | Mode Cleaner Servo Board Transfer Functions (to be updated) |
|
  |
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 |
  |
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.
|
|
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 |
|
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.
|
|
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
|
|
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
|
|
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 |
|
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. |
|
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 |
|
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. |
|
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 |
|
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. |
|
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.
|
|
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;
|
|
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.
|
|
1414
|
Fri Mar 20 15:54:29 2009 |
steve | Omnistructure | General | 480V crane power switch on MEZ | CES Mezzanine is beeing rebuilt to accommodate
our new neighbor: the 20ft high water slide...&
.jacuzzi |
|
1413
|
Fri Mar 20 15:37:58 2009 |
Kakeru | Update | oplevs | arm cavity oplev calibration |
I calibrated several oplevs with OSEM signal
as a confirmation of my fitting method the |
|
1412
|
Fri Mar 20 12:07:19 2009 |
Yoichi | Configuration | ASC | ETMY beam centering | I forgot to put this in the elog.
Last Sunday night, I centered the beam on
the ETMY because it was too low.
|
|
1411
|
Fri Mar 20 11:01:02 2009 |
steve | Update | PEM | particle counts are high | The outside particle counts for 0.5 micron
are 3 million this morning at 9am. Low clouds,
foggy condition with low inversion layer. |
|
1410
|
Thu Mar 19 10:45:43 2009 |
Yoichi | Configuration | IOO | A loose wire found for MC1 | I attached a 6-hour trend of the MC mirror
OSEM signals with the MC unlocked.
The drift of the MC1 is within 20 counts |
|
1409
|
Thu Mar 19 02:45:36 2009 |
Yoichi | Configuration | IOO | A loose wire found for MC1 | I found a loose connection of a wire in the
cross-connect between an ADC and the MC1
coil driver's UL bias input.
|
|
1408
|
Tue Mar 17 08:44:37 2009 |
Yoichi | Configuration | IOO | MC1 drift | I'm done with the MC1 drift measurement.
The result is attached. It is clear that
MC1 is in trouble. The small drifts in the |
|
1407
|
Mon Mar 16 15:19:52 2009 |
Osamu | DAQ | Electronics | SR785 | I borrowed SR785 to measure AA, AI noise
and TF. |
|
1406
|
Mon Mar 16 12:26:59 2009 |
Yoichi | Configuration | IOO | MC1 drift | There seems to be a large drift of MC1 even
when there is no WFS feedback.
The attached plot is an example a 20min trend. |
|
1405
|
Mon Mar 16 01:20:40 2009 |
rana | Configuration | IOO | MCWFS noise filtered on the SUS-MC | [SIZE=4][COLOR=darkgreen]Recently[/COLOR][/SIZE],
we noticed that the IOO-WFS system runs at
2048 Hz and sends its signals to the MC SUS
|
|
1404
|
Sun Mar 15 21:50:29 2009 |
Kakeru, Kiwamu, Osamu | Update | Computers | Some computers are rebooted | We found c1lsc, c1iscex, c1iscey, c1susvme,
c1asc and c1sosvme are dead.
We turned off all watchdogs |
|
1403
|
Sat Mar 14 22:53:12 2009 |
Kakeru | Update | oplevs | arm cavity oplev calibration | I finished a calibration of optical levers.
To calibrate oplevs, I locked appropriate |
|
1402
|
Fri Mar 13 22:07:14 2009 |
Yoichi | Update | Locking | Calibrated XARM error signal spectrum | Of course I made a mistake.
I put a pole at 1525Hz whereas it should
have been a zero.
|
|
1401
|
Fri Mar 13 20:23:37 2009 |
Yoichi | Update | LSC | AO path transfer function with X-arm locked | I measured the AO path transfer function while
the X-arm is locked with the POX PDH signal.
The POX-I signal was already connected to |
|
1400
|
Fri Mar 13 19:26:09 2009 |
Yoichi | Update | DMF | seisBLRMS compiled | I compiled seisBLRMS.
The tricks were the following:
(1) Don't add path in a deployed |
|
1399
|
Fri Mar 13 05:16:21 2009 |
Yoichi | Update | Locking | Locking update | Yoichi, Osamu,
With adjustments of the loop gains during |
 |
1398
|
Thu Mar 12 20:59:04 2009 |
Kakeru | Update | IOO | MC drift is terrible | After Rana went for his dinner, I aligned
periscope to make the MC output 3.2 (Attachment
1).
|
|
1397
|
Thu Mar 12 19:11:27 2009 |
rana | Update | IOO | MC drift is terrible | Kakeru, Rana, Yoichi
We used the [SIZE=4][COLOR=purple][B]SUS |
|
1396
|
Thu Mar 12 18:48:37 2009 |
Yoichi | Update | IOO | MC aligned but ... | After the MZ alignment, I aligned the MC with
the periscope mirrors.
It looked like the MC mis-alignment was mainly |
|
1395
|
Thu Mar 12 18:44:02 2009 |
Yoichi | Update | PSL | MZ aligned | The MC lost the alignment somehow this afternoon.
So I thought it was good time to touch the
MZ because I had to align the MC using the |
|
1394
|
Thu Mar 12 15:57:53 2009 |
Yoichi | Update | IOO | MC drift is terrible | Yoichi, Osamu,
Last night's locking work was totally interrupted |
 |
1393
|
Thu Mar 12 02:18:42 2009 |
Yoichi | Update | Locking | MC_I spectra (RF_AM) | I took several spectra of MC_I signal (see
attm1).
|
 |
1392
|
Thu Mar 12 00:29:39 2009 |
Jenne | Omnistructure | DMF | DMF being whiny again | [QUOTE]The seisBLRMS has been running on megatron
via an open terminal ssh'd into there from
allegra with matlab running.[/QUOTE]
|
|
1391
|
Wed Mar 11 23:41:33 2009 |
Kakeru, Yoichi | Update | IOO | WFS centering | We found the MC reflection was distorted
. And WFC beam went to upward of QPD
We recentered WFC beam and these |
|
1390
|
Wed Mar 11 22:57:48 2009 |
Yoichi | Update | Locking | Calibrated XARM error signal spectrum | I did a rough calibration of the XARM error
spectrum.
See the attached calibrated spectrum.
|
|