| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16822
|
Mon May 2 10:00:34 2022 |
Jordan | Update | VAC | TP3 Forepump tip seal replacement | [JC, Jordan]
Jordan recieved the new tip seal
Friday afternoon and I continued the replacement |
|
|
10279
|
Sat Jul 26 15:30:15 2014 |
Joseph Areeda | Update | Computer Scripts / Programs | NDS2 server propem on megatron | The NDS2 server on megatron was unresponsive
for what i think was the last couple of days.
The NDS the log file (~nds2mgr/logs/nds2-201407151045.log) |
|
|
5254
|
Wed Aug 17 12:14:27 2011 |
Josh Smith | Omnistructure | Computer Scripts / Programs | 40m summary page plans | Josh Smith, Fabian Magana-Sandoval, Jackie
Lee (Fullerton)
Thanks to Jamie and Jenne for the |
|
|
1221
|
Fri Jan 9 17:30:10 2009 |
Kakeru | Update | Computers | Snapshots of MEDM screens | I wrote a web page which shows snapshots of
MEDM screens generated by Yoich's script
(e-log #1206).
|
|
|
1225
|
Tue Jan 13 18:59:09 2009 |
Kakeru | Update | LSC | AS CCD centering and ASDD demod phase | I tuned the demod-phase for PRCL and SRCL
hand-off, but it have not been optimized
enoughly.
|
|
|
1241
|
Wed Jan 21 16:18:17 2009 |
Kakeru | Update | LSC | AS CCD centering and ASDD demod phase | I tuned the DD demod-pahse for SRM.
It was tuned as the error singnal is to be
0 when the cavity is locked.
|
|
|
1249
|
Fri Jan 23 12:48:12 2009 |
Kakeru | Update | oplevs | arm cavity oplev calibration | I calibrated optlevs of x and y arm cavity,
indipendently from Peter's work.
|
|
|
1259
|
Thu Jan 29 17:24:41 2009 |
Kakeru | Update | oplevs | arm cavity oplev calibration | I calibrated optlevs again. My previous work
has a lot of mistakes, so ignore it.
|
|
|
1262
|
Fri Jan 30 19:38:57 2009 |
Kakeru | Update | PSL | ISS Bad | Kakeru, Peter
We try to improve ISS bord, but there isn't |
|
|
1277
|
Fri Feb 6 09:52:35 2009 |
Kakeru | Update | PSL | Current shunt transfar function | I attach the transfar function of the current
shunt.
There is a little gap at 10 Hz for |
|
|
1278
|
Fri Feb 6 09:56:11 2009 |
Kakeru | Update | PSL | ISS servo transfar function | I attache the transfar function of ISS
servo.
The 4th stage and variable gain amplifier |
|
|
1279
|
Fri Feb 6 10:46:40 2009 |
Kakeru | Update | PSL | ISS servo and noise | I measured the output noise of eache stage
of ISS servo, and calcurated the noise ratio
between input and
|
|
|
1289
|
Tue Feb 10 23:36:25 2009 |
Kakeru | Update | PSL | PA current and laser output | I changed the PA current and measured laser
output power (monitor PD signal).
The gain of ISS is 13dB
|
|
|
1295
|
Wed Feb 11 23:51:53 2009 |
Kakeru | Update | PSL | PA current and laser output | I attached a plot of ISS monitor PD and MOPA
output to PA current.
The both end of PA current (26.0353[A] and |
|
|
1299
|
Thu Feb 12 18:35:10 2009 |
Kakeru | Configuration | PSL | PA current limitter |
I added a PA current limiter.
It is only a voltage devider (composed |
|
|
1328
|
Fri Feb 20 01:54:18 2009 |
Kakeru | Update | Computer Scripts / Programs | tdsdata might have a bug | I found a strange jump of value in my data
taken with tdsdata.
I couldn't find same jump in |
|
|
1362
|
Thu Mar 5 23:18:38 2009 |
Kakeru | Configuration | Computers | tdsdata doesn't work | I found that tdsdata doesn't work.
When I star tdsdata, he takes a few ~ 10 |
|
|
1375
|
Mon Mar 9 14:57:30 2009 |
Kakeru | Update | Computer Scripts / Programs | tdsdata doesn't work | I tested new tdsdata and found it was working
well.
I excited C1:SUS-ITMY_SUSPIT_EXC |
|
|
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).
|
|
|
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 |
|
|
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 |
|
|
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
|
|
|
1389
|
Wed Mar 11 21:03:51 2009 |
Kakeru and Kiwamu | Update | IOO | PSL angle QPD | Kakeru and Kiwamu
We placed a QPD on the PSL bench
for PSL angle monitor. |
|
|
1386
|
Wed Mar 11 14:51:01 2009 |
Kakeru, Joe, Rob | Update | IOO | MC alignment | This morning, MC alignment was gone and
MC wasn't lock.
We checked old value of pitch, yaw, |
|
|
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 |
|
|
1270
|
Tue Feb 3 23:44:44 2009 |
Kakeru, Peter, Yoichi | Update | PSL | ISS unstability | We found that one OP-amp used in ISS servo
oscillated in 10 MHz, 100mV.
Moreover, we found another OP-amp |
|
|
1313
|
Mon Feb 16 21:49:06 2009 |
Kakeru, Rana | Update | IOO | WFS | We centerd the input of WFS QPD. |
|
|
1358
|
Thu Mar 5 00:06:32 2009 |
Kakeru, Rana | Update | IOO | WFS centering | We found that the MC REFL image was no longer
round and that the MCWFS DC quadrant spots
were mostly
|
|
|
1376
|
Mon Mar 9 16:54:52 2009 |
Kakeru, Rana | Update | Computer Scripts / Programs | tdsdata doesn't work | We confirmed that new tds(/cvs/cds/caltech/apps/linux/tds_090304/)
works well on linux 64, and replaced it to
/cvs/cds/caltech/apps/linux/tds/ |
|
|
1283
|
Fri Feb 6 23:23:48 2009 |
Kakeru, Yoichi | Update | PSL | ISS is fixed | Yoichi and me found that the transfar function
of the current shunt changed with the current
of PA. |
|
|
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 |
|
|
10776
|
Wed Dec 10 21:05:56 2014 |
Kate | Update | SEI | Guralp briefly powered down | Kate & Jenne
About 2:30 this afternoon, we briefly
powered off the Guralp (C1:PEM-SEIS_GUR1_{X,Y,Z}) |
|
|
3431
|
Tue Aug 17 23:59:46 2010 |
Katharine | Update | elog | Maglev update | Katharine, Sharmila
Update: |
|
|
3100
|
Wed Jun 23 11:25:14 2010 |
Katharine and Sharmila | Update | WIKI-40M Update | Maglev | Weekly update
Lab work |
|
|
3181
|
Thu Jul 8 17:29:20 2010 |
Katharine, Sharmila | Update | elog | |
|
6x |
|
3200
|
Mon Jul 12 21:26:02 2010 |
Katharine, Sharmila | Update | elog | maglev coils | The connection between our coil wires and
BNC terminals was pretty awful (soldered
wires broke off |
|
|
3234
|
Fri Jul 16 12:36:00 2010 |
Katharine, Sharmila | Update | elog | levitation | After last night's challenge (or inspiration),
we levitated our magnet this morning.
Since the nice Olympus camera is not currently |
|
|
3256
|
Wed Jul 21 12:03:14 2010 |
Katharine, Sharmila | Update | WIKI-40M Update | weekly update | This past week, we levitated our small
cylindrical magnet (with the flag made from
heat shrink). Though the levitated |
|
|
3111
|
Wed Jun 23 23:55:03 2010 |
Katharine, Sharmila, Rana, Steve and Kiwamu | Update | VAC | wiped the BS | Some unused
optics in the BS chamber were removed. |
|
|
5470
|
Mon Sep 19 21:19:25 2011 |
Katrin | Update | Green Locking | Broadband photodiode characterization | Another Hamasutu S3399 photodiode was tested
with the electronic circuit as described
in LIGO-D-1002969-v. |
|
|
5511
|
Thu Sep 22 01:05:28 2011 |
Katrin | Update | Green Locking | New modulation frequency (Y arm) | [Kiwamu / Katrin]
On Wednesday, the green light was |
|
|
5531
|
Fri Sep 23 17:31:14 2011 |
Katrin | Update | Green Locking | Stray light reduction (Y) | I inserted several beam blocks and iris
on the Y arm Green table. There was/is lots
of stray light because a lot of the mirrors |
|
|
5585
|
Fri Sep 30 15:22:17 2011 |
Katrin | Update | Green Locking | What happened on green YARM? |
This is a kind |
|
|
5619
|
Tue Oct 4 20:34:20 2011 |
Katrin | Update | Green Locking | 7kHz Peak in servo input YARM | [Kiwamu, Katrin]
As reported earlier an oscillation
around 7kHz is an the PDH error signal. The |
|
|
5623
|
Wed Oct 5 18:31:02 2011 |
Katrin | Update | Green Locking | Exchanged mirror on YARM table | On the Green YARM end table the second
mirror behind the laser has been exchanged.
Reason: The light is impinging on |
|
|
5631
|
Fri Oct 7 17:35:26 2011 |
Katrin | Update | Green Locking | Power on green YARM table | After all realignment is finished, here
are the powers at several positions:
|
|
|
5646
|
Mon Oct 10 18:53:04 2011 |
Katrin | Update | Green Locking | Mirrors whose angle of incidence is not 45° | The angle of incidence of light is for
some mirrors on the YARM end table different
from 45° even though the mirrors are |
|
|
5657
|
Wed Oct 12 18:54:02 2011 |
Katrin | Update | Green Locking | 60 Hz oscillation due to broken BNC cable | There was a 60 Hz and 120 Hz oscillation
on the green PDH photo diode output. After
a long search, I could identify that |
|
|
5658
|
Wed Oct 12 19:58:32 2011 |
Katrin | Update | Green Locking | Power splitter is unbalanced | The mini circuit power splitter ZFRSC-42S+
used at the YARM has no balanced output as
it should have according to the data sheet. |
|
|
5661
|
Thu Oct 13 20:25:32 2011 |
Katrin | Update | Green Locking | LPF transfer function YARM | It is a 4th order filter with
cut of frequency of 120 kHz.
|
|