| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13370
|
Tue Oct 10 22:04:06 2017 |
rana | Update | LSC | AS55Q Dark Noise | how about calibrate the DC channels so
that you can just get the acutal power levels
from the trend data? |
|
|
13372
|
Wed Oct 11 14:42:03 2017 |
gautam | Update | LSC | AS55Q Dark Noise | I keep adding traces to this plot, here
is the most complete one I have now. Looks
like the input noise to the D040179 (measured |
|
|
13374
|
Wed Oct 11 19:31:32 2017 |
gautam | Update | LSC | AS55Q Dark Noise | I tried replacing the AD797s on the daughter
board with OP27s, and saw no significant
improvement in the electronics noise of the |
|
|
13376
|
Thu Oct 12 01:50:11 2017 |
gautam | Update | LSC | AS55Q Dark Noise | I worked on the daughter board a little
more in the evening. I have somehow managed
to make the dark noise ~25% worse [Attachment |
|
|
13378
|
Thu Oct 12 12:17:28 2017 |
gautam | Update | LSC | AS55Q Dark Noise | Here is the marked up schematic with the
board as it is stuffed. Annoyingly, there
is a capacitor (C1) which according to the |
|
|
13380
|
Fri Oct 13 12:26:12 2017 |
gautam | Update | LSC | AS55Q Dark Noise | Attachment #1 -
Measured / modelled noises for AS55 demod
board. I've plotted quadrature sum of |
|
|
13382
|
Mon Oct 16 16:01:04 2017 |
gautam | Update | LSC | AS55Q Dark Noise | Koji suggested looking at the output of
the AS55 demod board on a fast oscilloscope
to look for differences in the two channel |
|
|
13384
|
Tue Oct 17 19:31:53 2017 |
gautam | Update | LSC | AS55Q Dark Noise | [Koji, gautam]
We took a closer look at the AS55
demod board today. The procedure was to just |
|
|
5463
|
Mon Sep 19 16:20:35 2011 |
kiwamu | Update | LSC | AS55 whitening gain decreased | The
gain of whitening filters on AS55 was decreased
from 21 dB to 0 dB for the Y arm locking. |
|
|
8092
|
Fri Feb 15 21:22:29 2013 |
yuta | Update | Electronics | AS55 replaced with POP55 PD | I temporarily replaced AS55 PD with PD
labeled "POP55(POY55)".
I think POP55 is working because I |
|
|
4572
|
Wed Apr 27 15:34:38 2011 |
kiwamu | Update | Electronics | AS55 demod board with new 90 deg splitter : healthy |
A new 90 deg splitter, PSCQ-2-51W, |
|
|
4395
|
Thu Mar 10 01:31:37 2011 |
Kevin | Update | Electronics | AS55 Characterizations | I measured the transfer function, shot
noise, and dark spectrum of AS55.
From the shot noise measurement, |
|
|
10105
|
Wed Jun 25 20:45:04 2014 |
Nichin | Update | Electronics | AS55 Bodeplot | [Nichin]
I |
|
|
16608
|
Thu Jan 20 18:16:29 2022 |
Anchal | Update | BHD | AS4 set to trigger free swing test | AS4 is set to go through a free swinging
test at 10 pm tonight. We have used this
script (Git/40m/scripts/SUS/InMatCalc/ |
|
|
16589
|
Fri Jan 14 17:33:10 2022 |
Yehonathan | Update | BHD | AS4 resurrection | {Yehonathan, Anchal}
Came this morning, the gluing of
the magnets was 100% successful. Side blocks, |
|
|
16590
|
Fri Jan 14 18:12:47 2022 |
Anchal | Summary | BHD | AS4 placed in ITMY Chamber, OSEMs connected | AS4 was succesfully suspended and trasported
to ITMY chamber (40m/16589).
We placed it near the door to make it easy |
|
|
16594
|
Tue Jan 18 18:19:22 2022 |
Koji | Summary | BHD | AS4 placed in ITMY Chamber, OSEMs connected | AS4 satellite amplifier D1002818
/ D080276 troubleshoot
I dug into the circuit to see what/where |
|
|
16604
|
Thu Jan 20 16:42:55 2022 |
Paco | Update | BHD | AS4 OSEMs installation - part 2 | [Paco]
Turns out, the shifting was likely
due to the table level. Because I didn't |
|
|
16596
|
Wed Jan 19 12:56:52 2022 |
Paco | Summary | BHD | AS4 OSEMs installation | [Paco, Tega, Anchal]
Today, we started work on AS4 SOS
by checking the OSEM and cable. Swapping |
|
|
16581
|
Thu Jan 13 12:29:27 2022 |
Anchal | Summary | BHD | AS4 LR magnet broke | After the debacle with AS1 (40m/16580),
we decided the put the PEEK earthquake stop
by first removing the lower OSEM plate and |
|
|
16613
|
Fri Jan 21 16:40:10 2022 |
Anchal | Update | BHD | AS4 Input Matrix Diagonalization performed. | The free swinging test was successful.
I ran the input matrix diagonalization code
(/opt/rtcds/caltech/c1/Git/40m/scripts/SUS/InMAtCalc/sus_diagonalization.py) |
|
|
16616
|
Mon Jan 24 17:12:27 2022 |
rana | Update | BHD | AS4 Input Matrix Diagonalization performed. | I think our
suspension input matrix diagonalization is
not so robust usually because |
|
|
16619
|
Mon Jan 24 20:48:48 2022 |
Anchal | Update | BHD | AS4 Input Matrix Diagonalization performed. | I agree. That's an interesting idea.
But does that mean that there is an always
working inverse matrix solution or that any |
|
|
6488
|
Thu Apr 5 06:27:51 2012 |
kiwamu | Update | LSC | AS110 sideband monitor installed | [Jenne / Kiwamu]
We |
|
|
4576
|
Wed Apr 27 21:08:08 2011 |
rana | Update | LSC | AS11 | I worked
on AS_11 today. Its ready for its noise / |
|
|
16632
|
Fri Jan 28 16:35:18 2022 |
Anchal | Summary | BHD | AS1, PR2 and PR3 set to trigger free swing test | AS1, PR2 and PR3 are set to o go through
a free swinging test at 3 am. We have used
this script |
|
|
16599
|
Wed Jan 19 18:15:34 2022 |
Yehonathan | Update | BHD | AS1 resurrection | Today I suspended AS1. Anchal helped me
with the initial hanging of the optics. Attachments
1,2 show the roll balance and side magnet |
|
|
16603
|
Thu Jan 20 12:10:51 2022 |
Yehonathan | Update | BHD | AS1 resurrection | I was wondering whether I should take AS1
down to redo the wire clamping on the side
blocks. I decided to take the OpLev spectrum |
|
|
16722
|
Thu Mar 10 10:05:49 2022 |
Paco | Update | SUS | AS1 free swing test | [Paco, Ian]
Begin free swinging test
for AS1 at 10:05 AM, set for ~ 2.04 hours.
Test |
|
|
17228
|
Thu Nov 3 20:07:01 2022 |
Anchal | Summary | BHD | AS1 coil balancing required | [Anchal, Koji]
The LO phase lock that was achieved
lasts for a short time because as soon as |
|
|
16801
|
Thu Apr 21 20:33:31 2022 |
Koji | Update | BHD | AS1 UR OSEM problem localized in the chamber | Tega and Paco reported that the UR OSEM
of AS1 lost the response.
- I have checked the LED MON (left) |
|
|
16803
|
Fri Apr 22 12:03:09 2022 |
Tega | Update | BHD | AS1 UR OSEM problem localized in the chamber | [JC, Tega, Ian, Paco]
We found that the UR cable was
clamped to the table by one of the ITMY OPLEV |
|
|
16578
|
Tue Jan 11 18:40:25 2022 |
Anchal | Summary | BHD | AS1 Sat Amp has a PCB issue | AS1
Sat Amp (S2100741) has a critical PCB
issue on it's Ch5-8 board S2100548. This |
|
|
16579
|
Thu Jan 13 09:48:41 2022 |
Anchal | Summary | BHD | AS1 Sat Amp fixed | I fixed the issue in AS1
Sat Amp (S2100741) by using a razor blade.
I cut the short between the two places, cleaned |
|
|
16565
|
Mon Jan 10 17:04:47 2022 |
Anchal | Update | BHD | AS1 Sat Amp CH2 had offset | We found that there was a small offset
(~300 mV) at TP6 and TP8, in PD2 circuit
(CH2 of the board). I replaced U3 AD822ARZ |
|
|
16580
|
Thu Jan 13 12:24:08 2022 |
Anchal | Summary | BHD | AS1 SD and LR magnets broke | [Anchal (vacuum work), Paco (outside)]
After the AS1 Sat Amp fix (40m/16579),
we today were able to tune all OSEMs to the |
|
|
7665
|
Fri Nov 2 20:41:53 2012 |
Jenne | Update | Alignment | AS, REFL camera shots | These don't show anything too interesting,
but we're including them to show where the
beams are right now on the cameras, so we |
|
|
7666
|
Fri Nov 2 21:40:04 2012 |
Manasa | Update | Alignment | AS, REFL camera shots |
To get the camera shot of AS,
Y1 mirror on the path was replaced by a 99% |
|
|
7668
|
Mon Nov 5 09:53:35 2012 |
Jenne | Update | Alignment | AS, REFL camera shots | Today's photos:
AS:
|
|
|
11814
|
Wed Nov 25 22:59:42 2015 |
yutaro | Update | LSC | AS table optics realignment | I slightly changed the orientation
of a few mirrors on AS table that
are used to make the AS light get into PDs, |
|
|
7689
|
Thu Nov 8 20:11:54 2012 |
Jenne | Update | Alignment | AS steering moved out of POY's way, 2 green beams onto PSL table | [Jenne, Jamie, Manasa, Ayaka]
Flipped mount of OM2, moved OM2 behind |
|
|
1650
|
Thu Jun 4 01:32:20 2009 |
rob | Configuration | LSC | AS port mode scan | Here is a set of mode scans of the AS port,
using the OMC as a mode scanner. The
plot overlays various configurations of the |
|
|
13555
|
Wed Jan 17 23:36:12 2018 |
johannes | Configuration | General | AS port laser injection | Status of the AS-port auxiliary laser injection
Auxiliary laser with AOM
setup exists, first order diffracted beam |
|
|
13764
|
Wed Apr 18 22:46:23 2018 |
johannes | Configuration | General | AS port laser injection | Using Gautam's Finesse file and the
cad files for the 40m optical setup I propagated
the arm mode out of the AS port. For the |
|
|
13766
|
Thu Apr 19 01:04:00 2018 |
gautam | Configuration | General | AS port laser injection | For the arm cavity ringdowns, I guess we
don't need AS55/AS110 (although I think
the camera will still be useful for alignment). |
|
|
13810
|
Thu May 3 10:40:43 2018 |
johannes | Configuration | General | AS port laser injection | Instead of trying to couple the fiber output
into the interferometer, I'm doing the
reverse and maximize the amount of interferometer |
|
|
13811
|
Thu May 3 12:10:12 2018 |
gautam | Configuration | General | AS port laser injection | I think we need AS55 for locking the configuration
Jon suggested - AS55 I and Q were used to
lock the SRMI previously, and so I'd |
|
|
13881
|
Wed May 23 00:45:18 2018 |
johannes | Configuration | General | AS port laser injection | I was planning to set up the additions
to the AS table that are outlined in Attachment
#1. Unfortunately the beam is too large for |
|
|
16827
|
Tue May 3 21:05:23 2022 |
yuta | Update | BHD | AS path alignment, removing a lot of green stuff | [Tega, Yehonathan, Koji, Yuta]
We tried to align AS path this afternoon. |
7x |
|
16848
|
Thu May 12 19:55:01 2022 |
Tega | Update | BHD | AS path alignment | [Yuta, Tega]
We finally managed to steer the
AS beam from ITMY chamber, through BS and |
|