ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17532
|
Thu Mar 30 16:45:09 2023 |
Paco | Summary | LSC | PRMI gain estimates and expected flashing at BHD and POP ports | Here are our best estimates for the optic
transmission (power) coefficients.
|
|
|
17531
|
Thu Mar 30 09:51:41 2023 |
Paco | Update | ALS | XALS / YALS power normalized and noise spectra | After the XAUX - XARM lock was recovered
the C1:ALS-TRX_GAIN was set from 0.002 to
0.0006 to normalize the green transmission |
|
|
17530
|
Wed Mar 29 19:19:41 2023 |
Koji | Update | ALS | X end green now indefinitely locking | Stable
lock of the X End green laser was recovered.
- The biggest issue |
6x |
|
17529
|
Wed Mar 29 17:00:23 2023 |
Anchal | Update | IOO | MC Length feedback is present but not visible in MEDM | I confirmed that MC Length feedback path
to MC2 position is present and has been turned
off in recent history. Feedback filter module |
|
|
17528
|
Wed Mar 29 16:36:04 2023 |
Paco | Summary | BHD | "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" | I repeated the calculations but with FPMI
(last
case was all MICH). The qualitative behavior |
|
|
17527
|
Wed Mar 29 15:59:01 2023 |
Anchal | Update | IOO | c1ioo model updated to add sensing to optic angle matrices | I've updated c1ioo model with adding
WFS sensor to optic angle matrix and output
filter module option. The output filter modules |
|
|
17526
|
Tue Mar 28 10:58:03 2023 |
rana | Summary | BHD | "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" | but what about including the DC reflectivity
imbalance of the arms? there would be another
BH55 term from that field maybe. |
|
|
17525
|
Mon Mar 27 20:28:57 2023 |
Paco | Summary | BHD | "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" | Yuta pointed out that the BH55 signal was
weirdly never going to zero, so I actually
tuned the demod angle and made sure I was |
|
|
17524
|
Sun Mar 26 19:13:48 2023 |
yuta | Summary | LSC | PRMI sensing matrix and RF demodulation phase tuning | that is really a lot of high precision
for the REFL_11 demod phase...
for this kind of measurement, I |
|
|
17523
|
Fri Mar 24 15:05:41 2023 |
yuta | Summary | LSC | PRMI sensing matrix and RF demodulation phase tuning | PRMI sensing matrix was measured under
PRMI locked with REFL55_I and Q.
MICH actuator is 0.5*ITMX-0.5*ITMY |
|
|
17522
|
Fri Mar 24 12:54:51 2023 |
yuta | Summary | LSC | Actuator calibration of PRM using PRY | PRM actuator was calibrated using PRY by
comparing the actuation ratio between ITMY.
It was measured to be |
|
|
17521
|
Thu Mar 23 19:15:39 2023 |
yuta | Summary | LSC | PRMI locked using REFL55 | [Paco, Yuta]
We
locked PRMI in sideband using REFL55_I and |
|
|
17520
|
Thu Mar 23 17:47:53 2023 |
Paco | Update | NoiseBudget | LO phase noise budget (BH55_Q) | I drafted a calibrated LO Phase noise budget
using diaggui whose template is saved under
/opt/rtcds/caltech/c1/Git/40m/measurements/BHD/LO_PHASE_cal_nb.xml |
|
|
17519
|
Thu Mar 23 16:21:10 2023 |
rana | Update | IMC | Beam offset calculation for MC1,2,3 from dither results | I have changed the MC SUS output matrices
by a few % for some A2L decoupling - if it
causes trouble, please feel free to revert. |
|
|
17518
|
Thu Mar 23 14:20:29 2023 |
Koji | Summary | BHD | "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" | This is interesting. With the FPMI, the
DARM phase shift is enhanced by the cavity.
Therefore, I suppose the effect on the BH55 |
|
|
17517
|
Wed Mar 22 18:38:54 2023 |
Paco | Summary | BHD | "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" | [Paco, Yehonathan]
I took over the finesse calculations
Yehonathan had set up for BHD. The notebook |
|
|
17516
|
Wed Mar 22 15:51:44 2023 |
Alex | Update | IMC | Beam offset calculation for MC1,2,3 from dither results | I have organized the resulting data from
running dither lines on MC1,2,3. The data
has been collected from diaggui as shown |
|
|
17515
|
Tue Mar 21 18:41:12 2023 |
Alex | Update | IMC | Dither Lines set on MC1, MC2, MC3 for the night | With Anchal's help, I have setup dither
lines for Rana on MC1,2,3 that will be running
overnight. The oscilations were set on MC1,2,3, |
|
|
17514
|
Mon Mar 20 20:27:30 2023 |
yuta | Update | BHD | LO phase noise contribution in MICH BHD | [Paco, Yuta]
MICH was locked with balanced homodyne
readout with LO phase locked using BH55_Q |
|
|
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 |
|