| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15264
|
Tue Mar 10 19:59:09 2020 |
Yehonathan | Update | Loss Measurement | Arm transfer function measurement | I want to measure the transfer function
of the arm cavities to extract the pole frequencies
and get more insight into what is going |
|
|
15269
|
Thu Mar 12 10:43:50 2020 |
rana | Update | Loss Measurement | Arm transfer function measurement |
|
|
|
15277
|
Mon Mar 16 15:23:03 2020 |
Yehonathan | Update | Loss Measurement | Arm transfer function measurement | I measured the cross-calibration of the
two PDs on the PSL table.
I used the existing flip mounted |
|
|
15307
|
Sat Apr 18 14:57:44 2020 |
Yehonathan | Update | Loss Measurement | Arm transfer function measurement | Ok, now I understand my foolishness. It
should definitely be 1/sqrt(f^2+fp^2)
. |
|
|
15355
|
Tue May 26 14:32:44 2020 |
gautam | Update | LSC | Arm transmission RIN | Summary:
The measured RIN of the arm cavity
transmission when the PRFPMI is locked is |
|
|
15359
|
Wed May 27 19:36:33 2020 |
Koji | Update | LSC | Arm transmission RIN | My speculation for the worse RIN is:
- Unoptimized alignment -> Larger
linear coupling of the RIN with the misalignment |
|
|
15361
|
Thu May 28 18:36:45 2020 |
gautam | Update | LSC | Arm transmission RIN | I agree, I think the PRC excess angular
motion, PIT
in particular, is a dominant |
|
|
15362
|
Fri May 29 00:34:57 2020 |
rana | Update | LSC | Arm transmission RIN | how bout corner plot with power signals
and oplevs? I think that would show not just
linear couplings (like your coherence), but |
|
|
2611
|
Wed Feb 17 19:36:05 2010 |
Koji | Update | COC | Arm visibility | I
have measured the arm visibilities.
I did not see any change since the |
|
|
15225
|
Wed Feb 26 17:17:17 2020 |
Yehonathan | Update | | Arms DC loss measurements | {Yehonathan, Gautam}
In order to measure the loss in
the arm cavities in reflection, we use the |
6x |
|
10558
|
Wed Oct 1 19:40:46 2014 |
ericq | Update | LSC | Arms IR aligned | Summary:
Beamsplitter
was put into MC refl path.
HWP
was rotated to maximize power into PMC.
|
|
|
2605
|
Tue Feb 16 10:01:16 2010 |
Alberto | Configuration | LSC | Arms and PRC not locking | Since last Friday either the arms or the
PRC can't lock.
The montors show the beam flashing |
|
|
2607
|
Tue Feb 16 14:10:06 2010 |
josephb, rob, koji | Configuration | LSC | Arms and PRC not locking |
|
|
|
2608
|
Tue Feb 16 15:25:00 2010 |
Alberto | Configuration | LSC | Arms and PRC not locking |
|
|
|
9213
|
Mon Oct 7 13:55:26 2013 |
Jenne | Update | LSC | Arms locked in IR for many hours | Someone left the arms aligned, and the
LSC engaged, so the arms have been locked
almost continuously for several days |
|
|
8974
|
Tue Aug 6 19:53:15 2013 |
Jenne | Update | LSC | Arms locked in IR, aligned. IFO at nominal power | [Koji, Manasa, Jenne]
The Y arm was locked in IR, and we
saw flashing in the Xarm (Gautam had the |
|
|
8975
|
Wed Aug 7 10:09:30 2013 |
Koji | Update | LSC | Arms locked in IR, aligned. IFO at nominal power | I have a concern about the SRM suspension.
The yaw alignment bias produces huge pitch
coupling. |
|
|
9008
|
Tue Aug 13 21:09:03 2013 |
manasa | Update | Green Locking | Arms ready for ALS | I aligned
both the X and Y end green to the arms.
The transmitted green were aligned |
|
|
1233
|
Fri Jan 16 18:25:32 2009 |
Yoichi, Kakeru, Rana | Update | LSC | Arms were unstable | The single arm lock had been unstable for
both arms in the past few days.
|
|
|
3582
|
Fri Sep 17 03:32:11 2010 |
Koji | Update | SUS | Arrangement of the SUS towers | The day before yesterday, I was cleaning
a flow bench in the clean room.
I found that one SOS was standing |
|
|
3761
|
Fri Oct 22 15:06:43 2010 |
Jenne | Update | SUS | Arts and Crafts! | This afternoon I epoxied the guiderod and
wire standoff to the new PRM. I also
epoxied the magnets that Suresh picked out |
|
|
16725
|
Tue Mar 15 10:45:31 2022 |
Paco | Update | General | Assembled small in-vac optics | [Paco]
This morning I assembled LO3,
LO4 and AS3 (all |
|
|
3936
|
Tue Nov 16 23:36:29 2010 |
Suresh, Jenne | Update | SUS | Assembly of ETMs | [Jenne,
Suresh]
|
|
|
15111
|
Mon Jan 6 15:36:55 2020 |
Jon | Update | PSL | Assembly underway for c1psl upgrade | [Jon, Yehonathan]
We've begun assembling the
new c1psl Acromag chassis based on Yehonathan's |
|
|
15112
|
Mon Jan 6 16:07:12 2020 |
gautam | Update | PSL | Assembly underway for c1psl upgrade | RTFE.
Where did the spares go?
|
|
|
15113
|
Mon Jan 6 19:05:09 2020 |
not gautam | Update | PSL | Assembly underway for c1psl upgrade | I found them, thanks. After c1psl, there
are 4 2GB DIMM cards and 1 SSD left. I moved
them into the storage bins with all the other |
|
|
15116
|
Fri Jan 10 19:48:46 2020 |
yehonathan | Update | PSL | Assembly underway for c1psl upgrade | {Yehonathan, Jon}
I finished pre-wiring the PSL chassis.
I mounted the Acromags on the DIN rails and |
|
|
15118
|
Mon Jan 13 16:05:18 2020 |
yehonathan | Update | PSL | Assembly underway for c1psl upgrade | {Yehonathan, Jon}
I configured the Acromag channels
according to the Slow |
|
|
15120
|
Tue Jan 14 17:16:43 2020 |
yehonathan | Update | PSL | Assembly underway for c1psl upgrade | {Yehonathan, Jon}
I isolated a BIO Acromag completely
from the chassis and powered it up. The inverted |
|
|
15124
|
Wed Jan 15 10:12:46 2020 |
gautam | Update | PSL | Assembly underway for c1psl upgrade | I don't think this is an accurate statement.
XT1111 modules have sinking digital
outputs, while XT1121 modules have sourcing digital |
|
|
15127
|
Wed Jan 15 16:08:40 2020 |
not gautam | Update | PSL | Assembly underway for c1psl upgrade | You're right. We had the right
idea before but we got confused about this
issue. I changed all the XT1121s to XT1111 |
|
|
402
|
Tue Mar 25 15:56:09 2008 |
John | Update | Treasure | Assorted pictures | Some pictures scavenged from the D40. |
|
|
15380
|
Mon Jun 8 11:50:02 2020 |
Hang | Update | BHD | Astigmatism and scattering plots | We consider the astigmatism effects of
the stock options. The conclusions are:
1. For the AS path, the stock should work |
6x |
|
15381
|
Mon Jun 8 12:49:07 2020 |
Koji | Update | BHD | Astigmatism and scattering plots | Can you describe the mode matching
in terms of the total MM? Is MM_total = sqrt(MM_vert
* MM_horiz)? |
|
|
15382
|
Mon Jun 8 17:40:22 2020 |
Jon | Update | BHD | Astigmatism and scattering plots | MM_total = (MM_vert + MM_horiz) / 2.
The large astigmatic MM loss in
the LO case is mainly due to the strong LO4 |
|
|
15384
|
Mon Jun 8 21:45:47 2020 |
Jon | Update | BHD | Astigmatism and scattering plots | Hmm? T1300364
suggests MM_total = Sqrt(MM_Vert * MM_Horiz) |
|
|
15387
|
Tue Jun 9 15:02:56 2020 |
eHang | Update | BHD | Astigmatism and scattering plots | Using the updated AOI's for the LO
path: (4.8, 47.9, 2.9, 4.5) deg for (LO1,
LO2, LO3, LO4), we obtain the following results. |
|
|
4729
|
Tue May 17 01:05:56 2011 |
kiwamu | Update | LSC | Asymmetry measurement prep : recentering works | I
re-centered beams on several PDs and a camera
including : |
|
|
9774
|
Wed Apr 2 01:18:30 2014 |
Jenne | Update | LSC | Attempt at PRMI+2 arms | I was trying to lock PRMI+2 arms, but I'm
losing patience with the MC losing lock.
It's mostly well-behaved, but every now and |
|
|
9780
|
Thu Apr 3 00:30:52 2014 |
Jenne | Update | LSC | Attempt at PRMI+2 arms | [EricQ, Jenne]
We started out this evening by
locking the PRMI, on different REFL PDs, |
|
|
9781
|
Thu Apr 3 03:06:34 2014 |
Jenne | Update | LSC | Attempt at PRMI+2 arms | [EricQ, Jenne]
Much more success later!
We've had the arms locked on ALS |
|
|
9783
|
Thu Apr 3 18:09:54 2014 |
ericq | Update | LSC | Attempt at PRMI+2 arms | So, here's the basic: "We reduced
the CARM offset and saw more TRY" plot.
|
|
|
6736
|
Fri Jun 1 02:13:00 2012 |
Jenne | Update | Green Locking | Attempt at Ygreen beat - failed | [Yuta, Jenne]
We tried to find the Ygreen beat
note, with no success yet. We calculate |
|
|
9821
|
Thu Apr 17 01:18:34 2014 |
Jenne | Update | LSC | Attempt at handing CARM to REFL11 | [Jenne, Koji]
This evening, Koji and I followed
the procedure from last night (elog |
|
|
9829
|
Fri Apr 18 12:53:54 2014 |
Jenne | Update | LSC | Attempt at handing CARM to REFL11: Time series | Some time series data from Wednesday
night.
Here is the first time we've gotten |
|
|
897
|
Fri Aug 29 11:01:49 2008 |
josephb | Configuration | Computers | Attempt to change a channel gain in ICS-110B | As noted earlier by Rana, I was playing around
with the /cvs/cds/caltech/chans/daq/C1IOOF.ini
file with help from Rob. I had made a backup |
|
|
8654
|
Thu May 30 10:40:59 2013 |
Jamie | Configuration | CDS | Attempt to cleanup c1ioo ADC connections | I have attempted to reconcile all of the
ADC connections to c1ioo. Upon close
inspection, it appears that there was a lot |
|
|
922
|
Thu Sep 4 11:33:25 2008 |
josephb, Eric, Jenne | Configuration | Computers | Attempt to increase gain for C1:PSL-ISS_INMONPD_F via 110B | We were attempting to increase the gain on
the channel C1:PSL-ISS_INMONPD_F in preparation
to do a scan of the PMC at very low input |
|
|
925
|
Thu Sep 4 16:24:56 2008 |
rana | Configuration | Computers | Attempt to increase gain for C1:PSL-ISS_INMONPD_F via 110B | [quote]We were attempting to increase the
gain on the channel C1:PSL-ISS_INMONPD_F
in preparation to do a scan of the PMC at |
|
|
11394
|
Tue Jul 7 23:26:19 2015 |
Koji | Update | CDS | Attempt to list CDS issues | As Jamie succeded to realize somewhat workable
condition of the 40m CDS, I tried to list
the obvious CDS issues so that we can attack |
|