| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17513
|
Fri Mar 17 17:27:58 2023 |
Alex, Tomohiro | Update | IMC | Arm Cavity Noise injection with WFS1/2 PIT and YAW | Tomohiro and I performed some tests under
Rana's guidance to find cross corelations
between WFS1 and WFS2 output signals in both |
8x |
|
17512
|
Thu Mar 16 13:31:25 2023 |
Tomohiro | Update | IMC | Diagonalizing YAW output matrix using a different method | Purpose
To adjust the components
of the WFS2 column in the YAW output |
|
|
17511
|
Tue Mar 14 18:44:39 2023 |
yuta | Update | BHD | LO phase noise measurements in ITMX single bounce, MICH and FPMI | [Anchal, Yuta]
We have measured LO phase noise in |
|
|
17510
|
Tue Mar 14 15:46:06 2023 |
Tomohiro | Update | IMC | Diagonalizing YAW output matrix using a different method | Alex, Anchal, and I adjusted the number
of the MC2-TRANS column in the YAW output
matrix. We used the same method in 40m/17504 but |
|
|
17509
|
Tue Mar 14 13:59:11 2023 |
Anchal | Update | IMC | IMC WFS aligned and offsets reset | The WFS loops were not maximizing the IMC
transmission. The transmission counts remained
stuck at around 12500 counts. The reflection |
|
|
17508
|
Tue Mar 14 11:38:44 2023 |
Anchal | Update | IMC | Turned on 6:3lead FM7 on WFS1 and WFS2 YAW loops | I realized that for more phase margin,
rana
added 6:3lead filter on WFS PIT loops. |
|
|
17507
|
Tue Mar 14 11:34:05 2023 |
Alex | HowTo | Computer Scripts / Programs | Summary Pages Restart | If the summary pages go down, it could
be from a break in the script or some small
error. The first remedy for fixing this can |
|
|
17506
|
Mon Mar 13 19:53:36 2023 |
yuta | Update | BHD | FPMI BHD sensing matrix measurement with individual lines | FPMI BHD sensing matrix was measured by
an updated method with updated RF demodulation
phases for REFL55 and AS55. |
|
|
17505
|
Mon Mar 13 15:37:13 2023 |
Alex | Update | IMC | Step Response of newly diagonalizing YAW output matrix | From the work that Anchal has completed
for diagnolizing the YAW ouput matrix, a
step response was taken of this new matrix |
|
|
17504
|
Mon Mar 13 14:48:37 2023 |
Anchal | Update | IMC | Diagonalizing YAW output matrix using a different method | I tried a different method today to see
if it works. Following are the steps:
Run WFS relief.
Turn |
|
|
17503
|
Fri Mar 10 16:42:16 2023 |
Tomohiro | Update | IMC | Step response test on MC1, MC2, and MC3 YAW | Summary
We compared the new output
matrix with old one by the step |
|
|
17502
|
Thu Mar 9 19:20:44 2023 |
Anchal | Configuration | Calibration | FPMI DARM calibration run set to happen at 1 am | Running this test again tonight. Will probably
run it every night now.
|
|
|
17501
|
Thu Mar 9 14:22:24 2023 |
Alex | Update | Computer Scripts / Programs | Update to toggleWFSoffsets.py for step response testing | I have pushed changes made to the toggleWFSoffsets.py
script to the git.
This file may be found in: "/opt/rtcds/caltech/c1/Git/40m/scripts/MC/WFS/" |
|
|
17500
|
Thu Mar 9 10:29:15 2023 |
Alex | Update | IMC | Step response test on MC1, MC2, and MC3 YAW | Tomohiro, Anchal and I completed the following
processs for acquiring a new Output Yaw matrix
for the "C1IOO_WFS_OUTMATRIX". |
|
|
17499
|
Wed Mar 8 18:32:22 2023 |
Anchal | Configuration | Calibration | FPMI DARM calibration run set to happen at 1 am | On rossa in tmux session name FPMI_DARM_Cal,
a script is running to take FPMI DARM calibration
data at 1:00 am on March 9th. Please do not |
|
|
17498
|
Wed Mar 8 09:58:24 2023 |
rana | Update | IMC | Transfer Function for IMC mirrors using appropriately filtered noise | does Anyone understand why the broadband
noise injection is so bad around 1 Hz? we
do not see this issue with swept sine. noise |
|
|
17497
|
Wed Mar 8 09:17:21 2023 |
rana | Update | IMC | WFS noise ON/OFF | WFS error signal spectra w loops ON (G=4)
and OFF.
Current output matrix also attached. |
|
|
17496
|
Tue Mar 7 23:32:54 2023 |
rana | Update | IMC | Step response test on WFS 1, 2 and MC2_TRANS YAW | this measured Yaw matrix seems very different
from the previous one. How can they really
both be stable? |
|
|
17495
|
Tue Mar 7 23:15:16 2023 |
rana | Update | IOO | IMC WFS summary pages updated | changed some y-scale limits on the WFS
summary pages to zoom in better |
|
|
17494
|
Tue Mar 7 15:02:43 2023 |
Tomohiro | Update | IMC | Transfer Function for IMC mirrors using appropriately filtered noise | Summary
Alex, Anchal, and I adjusted
the every overall gain iin P/Y of WFS1, |
|
|
17493
|
Mon Mar 6 13:03:37 2023 |
Tomohiro | Update | IMC | Step response test on WFS 1, 2 and MC2_TRANS YAW | Summary
We do the step responce
test on WFS 1, 2 and MC2_TRANS |
|
|
17492
|
Sat Mar 4 18:57:18 2023 |
Paco | Configuration | Calibration | FPMI DARM calibration run | Locked FPMI, measured DARM and CARM OLTFs,
locked YAUX and measured the analog loop
TF at the cal line frequencies. Turned the |
|
|
17491
|
Fri Mar 3 18:47:13 2023 |
Paco | Summary | BHD | LO phase POS noise coupling - I | I tried some LO PHASE noise coupling measurements
today. With MICH locked using AS55_Q, I control
the LO phase using the single RF (BH55_Q) |
|
|
17490
|
Fri Mar 3 16:52:57 2023 |
rana | Update | IMC | Transfer Function for IMC mirrors using appropriately filtered noise | that is great
I think we would like to set the
WFS1 P/Y UGFs to be ~2-3 Hz, and the MC_TRANS |
|
|
17489
|
Thu Mar 2 18:37:05 2023 |
Tomohiro | Update | IMC | Transfer Function for IMC mirrors using appropriately filtered noise | Summary
Alex, Anchal, and I measure
the open-loop transfer function for |
|
|
17488
|
Thu Mar 2 10:54:25 2023 |
Paco | Update | SUS | LO1 dewhitening | We added the DB9 short connectors to all
coil drivers in the BHD suspensions and updated
FM9-FM10 for LO1, LO2, AS1, AS4, SR2, PR2 |
|
|
17487
|
Wed Mar 1 19:18:18 2023 |
Paco | Update | SUS | LO1 dewhitening | [Paco, Anchal]
Today we invested some time in
the DW filters for LO1 supension. We discovered |
|
|
17486
|
Wed Mar 1 17:13:38 2023 |
Alex | Update | IMC | Transfer Function for IMC mirrors using sine sweep | The following work has been done by Tomohiro,
Anchal and I:
To acquire the transfer functions |
|
|
17485
|
Wed Mar 1 10:16:31 2023 |
Tomohiro | Update | IMC | Angular actuation calibration for IMC mirrors using AC sine wave | Alex, Anchal, and I did the following experiment to
obtain calibration constants by oscillating
IMC mirrors. |
|
|
17484
|
Sun Feb 26 00:13:55 2023 |
Alex | Configuration | ASC | IOO MC PIT/YAW gain change | The following changes were made to the
WFS MASTER IMC Pitch and Yaw gains:
Gain values for the pitch and yaw |
|
|
17483
|
Fri Feb 24 15:21:39 2023 |
JC | Update | General | Large Optical Table Movement Solidworks | I sketched up the first encounter we will
have when moving the optical table out. I'm
assuming the table has already been turned |
|
|
17482
|
Fri Feb 24 13:33:22 2023 |
Tomohiro | Summary | IMC | Updated angular actuation calibration for IMC mirrors | Alex, Anchal, and I did the following to
make updated angular actuation calibration
for IMC mirrors. This is the revised version |
|
|
17481
|
Fri Feb 24 13:29:16 2023 |
Alex | Summary | IMC | Updated angular actuation calibration for IMC mirrors | Also reply to: 40m/17352
Tomohiro, Anchal, and I
did the following to make updates to the |
|
|
17478
|
Thu Feb 23 14:55:49 2023 |
yuta | Update | BHD | BH55 and BH44 orthogonality checks | Ideally, BH55 and BH44 should give orthogonal
signals to lock LO phase (40m/17302).
This was checked with various interferometer |
|
|
17477
|
Wed Feb 22 23:40:48 2023 |
Alex | Update | Calibration | Adding calibration constants for sus matrix and filter control buttons to the sus control screen | The callibration constants were updated
for the oplev pitch and yaw. The values were
changed as denoted in 17471 were: |
|
|
17476
|
Wed Feb 22 17:32:16 2023 |
yuta | Update | BHD | BH55 and BH44 both amplified | Since we need more signal for both BH55
and BH44 to compare LO phase locking scheme,
BH55 and BH44 RF outputs are now amplified |
|
|
17475
|
Tue Feb 21 19:04:15 2023 |
Radhika | Update | ALS | XARM green laser lock debugging | I retook the last spectrum measurement
of ALS beatnote fluctuations, with the HEPA
on and off. The top plot corresponds to BEATY, |
|
|
17474
|
Mon Feb 20 16:35:15 2023 |
rana | Update | IOO | MC WFS Work1 | I added a less agressive low pass filter
to give some more phase margin, and then
increased the overall gain by 4x. There is |
|
|
17473
|
Mon Feb 20 15:27:32 2023 |
rana | Update | Computers | pianosa software issues | notes
20-Feb-2023
* |
|
|
17472
|
Mon Feb 20 14:20:04 2023 |
rana | Update | IOO | MC WFS Work1 | Made a comparison plot between
the WFS1 PIT loop and the model. There is
good agreement. |
|
|
17471
|
Thu Feb 16 23:54:11 2023 |
Alex | Update | Daily Progress | Yaw and Pitch Calibration constants for ETMY op-lev | This work was done by Ancal and I.
To recallibrate the op-lev for
ETMY, a python script was first written to |
|
|
17470
|
Thu Feb 16 18:40:13 2023 |
Radhika | Update | ALS | XARM green laser lock debugging | [Rana, Radhika]
Yesterday we looked at the out-of-loop
PDH error signal of the AUX laser and determined |
|
|
17469
|
Thu Feb 16 15:25:52 2023 |
Radhika | Update | ALS | XARM green laser lock debugging | After seeing a 560 Hz peak in the XAUX
REFL PD signal, I took spectra of the
PDH error signal (post-demod) [Attachment |
|
|
17468
|
Thu Feb 16 14:44:06 2023 |
yuta | Update | BHD | FPMI BHD with BH55 recovered | FPMI BHD with LO phase locked using BH55
is recovered after 60 Hz frequency noise
saga. |
|
|
17467
|
Wed Feb 15 20:08:18 2023 |
rana | Update | IOO | IMC WFS obs |
looking at some IMC WFS swept sines,
it seems like there is poor margin around
1 Hz
increasing the overall gain |
|
|
17466
|
Wed Feb 15 16:16:59 2023 |
Anchal | Summary | BHD | IMC optics Coil Output Filter corrections | Overtime the coil output filters on IMC
optics have drifted into a bad configuration.
Today at the meeting, Rana told us the correct |
|
|
17465
|
Wed Feb 15 12:07:35 2023 |
Anchal | Update | ASC | ASC model updated to take inputs from IMC WFS | I have updates the ASC model inside c1ioo.mdl
file to take inputs from IMC WFS when selected
with AS option (on the left side of AS WFS |
|
|
17464
|
Tue Feb 14 18:39:53 2023 |
Radhika | Update | SUS | Bandstop widened for ITMX BounceRoll filter module | [Rana, Radhika]
While discussing xarm AUX
laser locking, we noticed excess motion of |
|
|
17463
|
Tue Feb 14 10:49:04 2023 |
yuta | Summary | BHD | MC1 electronics diagram and cable diconnection tests | Below are summary of electronics around
MC1 and cable disconnection tests.
These suggest that the 60 Hz noise |
|
|
17462
|
Mon Feb 13 17:35:20 2023 |
Anchal | Summary | BHD | 60 Hz frequency noise is coming from MC1 coils | [Anchal, Yuta]
We think we have narrowed
down the source of 60 Hz noise to one fo |
|