| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17427
|
Thu Jan 26 18:20:43 2023 |
Anchal | Update | PEM | HEPA Monitor setup using WFS BLRMS | I implemented the BLRMS on WFS1/2_I_PIT/YAW
outputs and using there value, a HEPA state
can be defined. I've currently set it |
|
|
17426
|
Thu Jan 26 16:07:05 2023 |
yuta | Summary | PSL | PMC aligned, now PMC transmission is 0.7 | PMC aligned (Attachment #1).
Over the past month, PMC transmission
is actually slowly growing from 0.68 to 0.70 |
|
|
17425
|
Thu Jan 26 15:56:30 2023 |
Anchal | Update | ASC | 1X1 -5V sorenson tripped | [Yuta, Anchal]
|
|
|
17424
|
Thu Jan 26 00:18:54 2023 |
Koji | Update | Cameras | Recording CCD cameras | Connect any video signal supported by the
adapter. Use Windows / Mac or any other OS.
If it keeps complaining, contact Magwell |
|
|
17423
|
Wed Jan 25 18:01:21 2023 |
yuta | Summary | BHD | BH44 setup isolated, but 60 Hz noise stays the same | [Paco, Anchal, Yuta]
Isolating
BH44 setup from the rest didn't help |
|
|
17422
|
Wed Jan 25 16:58:19 2023 |
Alex | Update | Cameras | Recording CCD cameras | Thus far, the software needed for the Magewell
video encoder has been successfully installed
on Donatella. OBS studio has also been installed |
|
|
17421
|
Wed Jan 25 14:33:07 2023 |
rana | Summary | BHD | REFL55 visually inspected, BH44 Kapton taped | Kapton tape is a good insulator, so its
a good block for 60 Hz. But it is mostly
useless for RF since the capacitance between |
|
|
17420
|
Wed Jan 25 12:49:14 2023 |
Radhika | Update | ALS | XARM green laser lock debugging | |
|
|
17419
|
Wed Jan 25 11:35:20 2023 |
yuta | Summary | BHD | REFL55 visually inspected, BH44 Kapton taped | Following was done to investigate 60 Hz
noise issue, but no significant change in
the FPMI noise observed. |
|
|
17418
|
Wed Jan 25 10:02:47 2023 |
yehonathan | Update | | Earthquake, MC3 watchdog tripped | We came this morning and noticed the FSS_FAST
channel was moving very rapidly. Short inspection
showed that MC3 watchdog got tripped. After |
|
|
17417
|
Tue Jan 24 21:29:31 2023 |
yuta | Summary | BHD | Electronics diagram around BH44 and BH55 | 1) Turning the whitening filter before
the ADC on/off didn't changed the relative
height of 60 Hz peak compared with the |
|
|
17416
|
Tue Jan 24 21:04:59 2023 |
Anchal | Update | ASC | AS WFS path beam profiled | I completed the mode matching calculation
today and found good solution with 360.6
mm ROC PLCX lens at -1.2 m from z=0 point. |
|
|
17415
|
Tue Jan 24 16:12:07 2023 |
rana | Summary | BHD | FPMI displacement noise with 60 Hz harmonics side lobes | 1) do a comparison with the whtiening before
the ADC on/off. This will tell us if it is
pickup before the whtiening filter or not. |
|
|
17414
|
Tue Jan 24 11:21:59 2023 |
yuta | Summary | BHD | FPMI displacement noise with 60 Hz harmonics side lobes | Just to show how bad 60 Hz noise is, I
compared FPMI displacement noise with pre-BH44
era (measured on Jan 13, 40m/17400). |
|
|
17413
|
Mon Jan 23 22:51:17 2023 |
yuta | Summary | BHD | 60 Hz harmonics side lobe investigations | [Paco, Yehonathan, Yuta]
Since we have installed BH44, we
are seeing side lobes of 60 Hz + harmonics |
|
|
17412
|
Mon Jan 23 20:50:58 2023 |
Anchal | Update | ASC | AS WFS path beam profiled | I measured the expected beam profile by
WFS photodiodes by measuring the beam when
mode cleaner was unlocked from the point |
|
|
17411
|
Mon Jan 23 16:31:23 2023 |
rana | Update | ALS | DFD and Phase tracker AM coupling | Both the TF measurement and the noise measurements
are useful, but the nosie measurement is
much more meaningful. Since we expect the |
|
|
17410
|
Mon Jan 23 11:20:44 2023 |
JC | Summary | BHD | BH44 RFPD optical path and LO/AS camera | Here's the beam path of BH44. |
|
|
17409
|
Sat Jan 21 18:01:06 2023 |
Anchal | Update | ALS | DFD and Phase tracker AM coupling | I took transfer function measurement
of DFD AM coupling using noise excitation.
Noise excitation |
|
|
17408
|
Sat Jan 21 15:32:40 2023 |
Anchal | Update | ASC | AS WFS path nominally set | I've completed the beam redirection
path for AS beam to WFS heads in a nominal
way. By that I mean that all mirrors (M1, |
|
|
17407
|
Fri Jan 20 20:13:20 2023 |
Anchal | Update | ASC | Installed 2 flipper mirrors for handingl MC reflection beam to camera | After discussions with Yuta, I figured
that a better optical layout is possible
which does not interfere with the existing |
|
|
17406
|
Thu Jan 19 20:35:54 2023 |
Anchal | Update | ASC | Installed 2 flipper mirrors for handingl MC reflection beam to camera | Today I installed two flipper mirrors M3
and M4 (see attached photo) to create alternate
route for MC reflection camera beam. Both |
|
|
17405
|
Thu Jan 19 18:15:48 2023 |
yuta | Summary | BHD | BH44 RFPD optical path and LO/AS camera | [JC, Paco, Anchal, Yuta]
- We installed the new BH44 beam path |
|
|
17404
|
Thu Jan 19 14:58:40 2023 |
rana | Summary | BHD | IQ demod orthogonal | the
problems with these circle plots: |
|
|
17403
|
Thu Jan 19 12:12:09 2023 |
Anchal | Summary | BHD | IQ demod orthogonal | By sending two frequencies offset from
eachother to LO input and RF input, we measured
the remaining phase difference between I |
|
|
17402
|
Wed Jan 18 20:57:53 2023 |
Paco | Summary | BHD | IQ demod orthogonal | I tested a spare IQ demod board labeled
33.3 MHz (closer to 44 MHz than the 165 MHz
we had started using) and using the Moku |
|
|
17401
|
Tue Jan 17 20:03:19 2023 |
yuta | Summary | BHD | BH44 installations: IQ demodulator is not orthogonal | [Anchal, Paco, JC, Yuta]
We have started hardware installations |
6x |
|
17400
|
Fri Jan 13 18:54:59 2023 |
yuta | Summary | LSC | Investigations of LO phase locking in FPMI BHD | [Paco, Yuta]
After several hours of unattended |
|
|
17399
|
Fri Jan 13 14:20:34 2023 |
yuta | Summary | LSC | Calibration friendly FPMI BHD | [Paco, Yuta]
Gains in DARM are corrected to make |
|
|
17398
|
Fri Jan 13 13:34:12 2023 |
Anchal | Summary | BHD | BH44 tuned and transimpedance measured | I've tuned one gold box RFPD to be
resonant at 44.26 MHz and I left the notch
to be near 66 MHz, however, it is only effective |
|
|
17397
|
Thu Jan 12 18:51:17 2023 |
Paco | Update | ALS | DFD and Phase tracker AM coupling | [Anchal, Paco]
We measured DFD AM coupling; it
seems to be minimum at higher RF input and |
|
|
17396
|
Thu Jan 12 15:31:27 2023 |
Radhika | Update | ALS | XARM green laser lock debugging | [Radhika, Anchal, Paco]
AUX
PDH Loop Stability |
|
|
17395
|
Thu Jan 12 12:00:09 2023 |
Paco | Summary | LSC | FPMI BHD sensitivity curve with higher resolution upto 6.9 kHz | Here's the same sensitivity plot from
yesterday (40m/17392),
but with higher frequency resolution, upto |
|
|
17394
|
Thu Jan 12 10:06:10 2023 |
Paco | Update | ALS | DFD discriminant calibration | [Paco, Anchal] Log from yesterday
work around 1Y2 rack; note that while this
work was ongoing, TT2 position drifted slowly |
|
|
17393
|
Wed Jan 11 17:05:55 2023 |
Anchal | Update | ASC | WFS demodulation board 112B - Working as expected | The other modified board 112B has been
fixed and tested now. See the results attached.
The issue was in some malfunctioning OP284 |
|
|
17392
|
Wed Jan 11 16:56:57 2023 |
yuta | Summary | LSC | FPMI BHD recovered, LO phase noise not limiting the sensitivity | [Paco, Yuta]
We recovered FPMI BHD, and sensitivity |
6x |
|
17391
|
Tue Jan 10 20:24:29 2023 |
Anchal | Update | ASC | WFS demodulation board 111B - Working as expected | I've completed the modifications on
two WFS demod boards. This required replacing
all 8 mixer ICs on each board. I also tuned |
|
|
17390
|
Tue Jan 10 16:06:58 2023 |
yuta | Summary | PSL | PMC transmission dropped to 0.68 | [JC, Paco, Yuta]
It seems like PMC transmission
(C1:PSL-PMC_PMCTRANSPD) dropped to ~0.68 |
|
|
17389
|
Tue Jan 10 15:07:33 2023 |
JC | Update | General | Clean Large Optical Table | I have been working on cleaning the large
optical table next to the PSL table. I have
placed the known optics along in the optical |
|
|
17388
|
Mon Jan 9 19:41:01 2023 |
Anchal | Update | SUS | Null stream (butterfly/pringle) row added and DQed | I updated the suspension model (/cvs/cds/rtcds/userapps/trunk/sus/c1/models/lib/sus_single_control_new.dml)
to add a 5th row in the input matrix so that
we can put in the calculated NULL stream |
|
|
17387
|
Thu Jan 5 14:30:32 2023 |
Paco | HowTo | DAQ | nds2 server restart | After being unable to fetch data offsite
using the nds40 server, I found enlightment
here. |
|
|
17386
|
Wed Jan 4 17:15:41 2023 |
Koji | Configuration | CDS | unknown dhcp request to fb1 | The dhcpd error on the log file stopped
when the yellow (DAQ) ethernet cable was
removed. With Chris's permission I left |
|
|
17385
|
Wed Jan 4 15:10:19 2023 |
Koji | Configuration | CDS | unknown dhcp request to fb1 | Jamie reported that:
The logs (/var/log/daemon.log)
on fb1 are filling with this line: |
|
|
17384
|
Wed Jan 4 12:12:57 2023 |
Paco | Summary | Calibration | ALS calibration error from DFD | [Paco, Anchal]
One of the crucial and currently
limiting calibration errors is in the ALS |
|
|
17383
|
Wed Jan 4 08:52:11 2023 |
JC | Update | OPLEV Tables | ETMX laser has died | Koji mentioned to me that this laser has
a degraded output. I removed this replacement
laser and put in a new laser from the Y Arm |
|
|
17382
|
Tue Jan 3 17:41:55 2023 |
Koji | Update | CDS | Chiara local backup | Chris modified the fstab so that the disk
is automatically mounted. The key was that
these two disks have an identical UUID and |
|
|
17381
|
Tue Jan 3 16:11:05 2023 |
Koji | Update | CDS | Chiara local backup | I checked how the local backup of our /cvs/cds
is done. The last backup was taken on 2022-12-15
and it kept failing since 2022-12-16. |
|
|
17380
|
Tue Jan 3 15:28:12 2023 |
JC | Update | OPLEV Tables | ETMX laser has died | Seems that the ETMX laser died over the
break and took an extended vacation. I swapped
the laser out with one Koji would use to |
|
|
17379
|
Tue Jan 3 12:10:46 2023 |
Jamie | Update | CDS | Yearly DAQD fix 2023, did not work :( | This
whole procedure is no longer needed after
the CDS upgrade. We don't do things |
|
|
17378
|
Tue Jan 3 11:32:32 2023 |
Anchal | Update | CDS | Yearly DAQD fix 2023, did not work :( | Every year some changes need to be done
manually in a driver c code file for daqd
to work. The gpstime offset needs to be changed |
|