| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17224
|
Thu Nov 3 16:00:58 2022 |
alex | Summary | General | Sensoray updates | I am currently working on getting the driver
reinstalled on Donatella for the sensoray.
An issue keeps arising that will not allow |
|
|
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 |
|
|
17236
|
Mon Nov 7 17:10:41 2022 |
Anchal | Summary | BHD | QPD installation seems like lost cause | The new QPD installation is turning out
to be much more hard than it originally seemed.
After finsing the cable, QPD and interface |
|
|
17247
|
Tue Nov 8 21:39:12 2022 |
alex | Summary | General | Sensoray & SDI Video Encoder selection | I have been looking at various replacements
for the sensoray, and have found that the
majority of new usb video encoders don't |
|
|
17253
|
Thu Nov 10 17:40:31 2022 |
Paco | Summary | Calibration | Calibration Plan | Plan to calibrate single arm actuation
strength
Lock single arm cavity |
|
|
17257
|
Fri Nov 11 14:15:45 2022 |
Paco | Summary | Calibration | Single arm cal with 5 lines | I turned all the LSC oscillators on and
used the digital demod for BEATYF (fine y
als beat) to grab the data. For this I added |
|
|
17266
|
Tue Nov 15 11:04:01 2022 |
Paco | Summary | Calibration | Single arm cal with 5 lines | YALS Hardware inspection
The
ALS Cal for ITMY actuation was off by ~ 1000,
so I decided I don't trust / understand |
|
|
17270
|
Tue Nov 15 19:00:56 2022 |
yuta | Summary | BHD | MICH locked with balanced homodyne readout at some LO phase | [Paco, Yuta]
MICH
was locked with BHD DCPD A-B signal with |
|
|
17274
|
Wed Nov 16 18:41:17 2022 |
yuta | Summary | BHD | Optical gain calibrations for BHD MICH | Optical gains of AS55 and BH55 are calibrated
for BHD MICH.
LO-ITM single bounce: |
|
|
17276
|
Thu Nov 17 09:06:35 2022 |
JC | Summary | General | Light Replace | Electrical Shop came in today to replace
the lightbulbs around 40m. I supervised the
entire visit, inside and outside the lab |
|
|
17279
|
Thu Nov 17 14:12:58 2022 |
yuta | Summary | BHD | Optical gain calibrations for BHD MICH with lower UGF | [Paco, Yuta]
We found that MICH UGF was unexpectedly |
|
|
17282
|
Thu Nov 17 20:02:10 2022 |
yuta | Summary | BHD | MICH optical gain measurements with different LO phases | MICH
optical gain was measured with different
LO phases over ~90 degrees. |
|
|
17284
|
Fri Nov 18 13:05:00 2022 |
yuta | Summary | BHD | Gains adjusted for bandstop filters for BHD optics | [Paco, Yuta]
We realized that bandstop filters |
|
|
17285
|
Fri Nov 18 16:58:39 2022 |
yuta | Summary | BHD | Actuator calibrations for MICH BHD | As there is some confusion in actuator
calibration, we have done the measurement
again from scratch. |
7x |
|
17287
|
Fri Nov 18 22:46:02 2022 |
yuta | Summary | BHD | MICH optical gain measurements with different LO phases, with signs | MICH
optical gain with a sign was measured with
different LO phases over ~180 degrees, with |
|
|
17291
|
Mon Nov 21 11:52:50 2022 |
Radhika | Summary | Calibration | Single arm cal with 5 lines | [Paco, Radhika]
We set out to realign the YARM
AUX laser input into the arm cavity. |
|
|
17294
|
Mon Nov 21 17:44:00 2022 |
yuta | Summary | BHD | MICH BHD displacement sensitivity with AS55_Q and BHD_DIFF | [Paco, Yuta]
MICH displacement sensitivity was
compared under AS55_Q locking and BHD_DIFF |
|
|
17298
|
Tue Nov 22 10:29:31 2022 |
Anchal | Summary | SUS | ITMY Coil Strengths Balanced | I followed this
procedure to balance the coil strengths
on ITMY. The position sensor was created |
|
|
17303
|
Wed Nov 23 14:59:11 2022 |
Paco | Summary | BHD | BHD_DIFF sensitivity to BS dither with MICH Offset | [Yuta, Paco, Anchal]
We measured
(a) |
|
|
17309
|
Wed Nov 23 20:58:23 2022 |
yuta | Summary | BHD | BHD_DIFF sensitivity to BS dither with MICH Offset with different BH55 demodulation phases | [Anchal, Paco, Yuta]
Attachment #1 is the same plot as |
|
|
17317
|
Mon Nov 28 16:53:22 2022 |
Anchal | Summary | BHD | F2A filters on LO1 LO2 AS1 and AS4 | [Paco, Anchal]
I changed the script in /opt/rtcds/caltech/c1/Git/40m/scripts/SUS/outMatFilters/createF2Afilters.py |
|
|
17319
|
Mon Nov 28 18:21:50 2022 |
Paco | Summary | BHD | BH44 prep | I checked the LSC rack to evaluate what
we might need to generate 44 MHz rf in the
hypothetical case we go from BH55 to BH44 |
|
|
17328
|
Wed Nov 30 20:01:08 2022 |
rana | Summary | Calibration | Single arm cal with 5 lines | I don't think you need to record the
excitations. They are just sine waves. The
amplitude you can read off from the OSC screen. |
|
|
17329
|
Thu Dec 1 20:43:25 2022 |
Anchal | Summary | Calibration | Single arm cal with 5 lines | [Anchal, Paco]
We are doing this attempt again
in following configuration: |
|
|
17343
|
Tue Dec 6 17:12:23 2022 |
yehonathan | Summary | BHD | LO phase control using audio (MICH and AS1) + RF | {Yuta, Yehonathan}
Today we lock LO phase using audio+RF
method in two variants: AS1+RF and MICH(BS)+RF. |
|
|
17345
|
Wed Dec 7 16:21:05 2022 |
yuta | Summary | BHD | Improved MICH BHD alignment | [Yehonathan, Yuta]
We found that moving AS1 in yaw improves |
|
|
17346
|
Thu Dec 8 16:21:40 2022 |
Paco | Summary | Calibration | ITMY actuation strength cal with 5 lines | [Anchal, Paco]
After debugging the hardware, on
gpstime 1354422834 we turned |
|
|
17347
|
Thu Dec 8 17:52:39 2022 |
yuta | Summary | BHD | MICH BHD optical gain measurements at different LO phases, RF+audio dither | [Yehonathan, Yuta]
Sensing matrix measurements at
different LO phases were performed under |
|
|
17349
|
Fri Dec 9 05:04:45 2022 |
rana | Summary | ASC | MC WFS sensing matrix measurement | I made a script to toggle the offsets in
the MC SUS so that we can see the resulting
error signals in the MC WFS / MC-TRANS_QPD. |
|
|
17351
|
Fri Dec 9 13:18:57 2022 |
yuta | Summary | BHD | MICH BHD optical gain measurements at different LO phases, elliptic fit | [Yehonathan, Yuta]
Here's a plot using same dataset |
|
|
17352
|
Fri Dec 9 14:18:43 2022 |
Anchal | Summary | SUS | IMC optics angular actuation calibration at DC | Also reply to: 40m/16125
I migrated the code used
in 40m/16125 |
|
|
17354
|
Fri Dec 9 18:32:11 2022 |
Koji | Summary | ASC | MC WFS sensing matrix measurement | [Rana, Koji]
The IMC WFS pitch Output
Matrix was recalculated based on a DC Sensing |
|
|
17356
|
Fri Dec 9 23:44:14 2022 |
rana | Summary | ASC | MC WFS sensing matrix measurement | with the new output matrix, we repeated
the diagonalization script that Anchal ran
previously. In the attached plot you can |
|
|
17359
|
Wed Dec 14 17:01:39 2022 |
Paco | Summary | LSC | FPMI in the post-cds upgrade era | [Paco, Anchal, Koji]
A possible long-hidden
bug of MC2 dewhitening switching was found |
|
|
17361
|
Fri Dec 16 14:52:42 2022 |
Paco | Summary | SUS | MC1 and MC3 coil dewhitening filters added, location corrected | I corrected the filter module location
for 28 Hz ELP filter on MC1 and MC3 coil
output filter banks to FM8 (from FM9). FM9 |
|
|
17362
|
Fri Dec 16 18:48:49 2022 |
yuta | Summary | General | IFO alignment after power loss | [Paco, Yuta]
We have recovered the IFO alignment |
|
|
17366
|
Tue Dec 20 09:20:18 2022 |
Paco | Summary | LSC | FPMI locked and cal | [Anchal, Yuta, Paco]
Late elog (from yesterday) -- We
locked FPMI, YAUX, and turned on calibration |
|
|
17367
|
Tue Dec 20 18:27:14 2022 |
Anchal | Summary | LSC | FPMI locked, DARM calibration data taken, FPMI BHD locked! | [Anchal, Paco, Yuta]
FPMI |
|
|
17369
|
Wed Dec 21 12:18:44 2022 |
Paco | Summary | LSC | FPMI locked, but FPMI BHD not locked | [Yuta, Paco]
We tried restoring the FPMI BHD
readout from yesterday but |
|
|
17372
|
Thu Dec 22 15:52:48 2022 |
Koji | Summary | DetChar | Summary on the summary pages | [Tega Koji]
Last week, Tega gave me
a brief introduction to the configuration |
|
|
17374
|
Fri Dec 30 11:38:45 2022 |
Paco | Summary | Calibration | ALS Calibration errors -- single arm actuation | Here are my thoughts on calibration errors.
This applies to the single arm actuation
calibration, but may easily be extended to |
|
|
17376
|
Sat Dec 31 19:27:32 2022 |
Paco | Summary | Calibration | ETMY actuation strength cal with 5 lines | Calibrated ETMY actuation strength using
ALS. Attachment #1 shows
the result, in close agreement with this |
|
|
17377
|
Sat Dec 31 20:00:03 2022 |
rana | Summary | Calibration | ETMY actuation strength cal with 5 lines |
how much frequency dependent variation
in the transfer function do we expect? Are
there resonances in the mechanical suspension |
|
|
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 |
|
|
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 |
|
|
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 |
|
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 |
|
|
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 |
|
|
17399
|
Fri Jan 13 14:20:34 2023 |
yuta | Summary | LSC | Calibration friendly FPMI BHD | [Paco, Yuta]
Gains in DARM are corrected to make |
|
|
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 |
|