ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
17097
|
Mon Aug 22 14:36:49 2022 |
rana | Update | SUS | Open loop transfer function measurements for local damping loops of Core optics | for damping and OL loops, we typically
don't measure the TF like this because
it takes forever and we don't need that |
|
17102
|
Wed Aug 24 12:02:24 2022 |
Paco | Update | SUS | ITMX SUS is sus UL glitches? | [Yehonathan, Paco]
This morning, while attempting
to align the IFO to continue with noise-budgeting, |
|
17105
|
Thu Aug 25 16:05:51 2022 |
Yehonathan | Update | SUS | Trying to fix some SUS | I tried to lock the Y/X arms to take some
noise budget. However, we noticed that TRX/Y
were oscillating coherently together ( |
 |
17133
|
Tue Sep 6 17:39:40 2022 |
Paco | Update | SUS | LO1 LO2 AS1 AS4 damping loop step responses | I tuned the local damping gains for LO1,
LO2, AS1, and AS4 by looking at step responses
in the DOF basis (i.e. POS, PIT, YAW, and |
   |
17134
|
Wed Sep 7 14:32:15 2022 |
Anchal | Update | SUS | Updated SD coil gain to keep all coil actuation signals digitally same magnitude | The coil driver actuation strength for
face coils was increased by 13 times in LO1,
LO2, SR2, AS1, AS4, PR2, and PR3. |
|
17147
|
Tue Sep 20 18:18:07 2022 |
Anchal | Summary | SUS | ETMX, ETMY damping loop gain tuning | [Paco, Anchal]
We performed local damping loop
tuning for ETMs today to ensure all damping |
|
17218
|
Tue Nov 1 15:41:18 2022 |
Anchal | Update | SUS | F2A filter design and trial on MC1 | Following discussion in this elog thread
(40/6004),
I used the design of F2A (force to angle(pitch)) |
  |
17219
|
Tue Nov 1 17:17:27 2022 |
Anchal | Update | SUS | Modified F2A filter design and trial on MC1 | After a quick discussion with Yuta, we
figured that the introduction of a finite
Q that Peter Fritschel does in this DCC doc |
|
17220
|
Tue Nov 1 17:59:23 2022 |
Anchal | Update | SUS | Added F2A filters on MC1, MC2, and MC3 | I've cleared all old attempts on F2A
filters on MC1, MC2, and MC3, and added the
default F2A filter described in the last |
|
17222
|
Thu Nov 3 14:00:29 2022 |
Anchal | Update | SUS | MC1 coil strengths balanced | I balanced the face coil strengths of MC1
using following steps:
At |
|
17223
|
Thu Nov 3 14:42:57 2022 |
Anchal | Update | SUS | MC2 coil strengths balanced | Balanced MC2 coil strengths using the
same method.
Final coil strengths found: |
|
17225
|
Thu Nov 3 16:22:11 2022 |
Anchal | Update | SUS | MC3 coil strengths balanced | Balanced MC3 coil strengths using the
same method.
Final coil strengths found: |
|
17227
|
Thu Nov 3 17:36:00 2022 |
Anchal | Update | SUS | F2A filters on MC1, MC2, and MC3 set to test at 1 am |
|
|
17230
|
Mon Nov 7 08:36:10 2022 |
JC | Update | SUS | IMC out of alignment -- f2A failure | [Paco, JC]
We came in this morning and noted
the IMC was grossly misaligned, with |
|
17231
|
Mon Nov 7 11:24:05 2022 |
Anchal | Update | SUS | F2A filters on MC1, MC2, and MC3 set to test at 1 am | This test was not successfull as IMC lost
lock during the f2A filter trial. However,
we do have 1 hour off data when all f2A filters |
  |
17232
|
Mon Nov 7 12:02:15 2022 |
Anchal | Update | SUS | IMC test with PSL shutter closed. | Following configurations were kept today
morning:
|
|
17234
|
Mon Nov 7 14:38:59 2022 |
Anchal | Update | SUS | MC3 coil strengths rebalanced | I checked again today by sending excitation
at POS and reading back from C1:IOO-MC_TRANS_P
and C1:IOO-MC_TRANS_Y. I found that there |
|
17235
|
Mon Nov 7 16:14:43 2022 |
Anchal | Update | SUS | F2A filter with Q=1, 0.3 stable with MC3 | I tired running for a few hours F2A filter
with Q=1 and for maybe 30 min Q=0.3 on MC3
today and that keeps the suspension stable. |
|
17237
|
Mon Nov 7 19:53:12 2022 |
Anchal | Update | SUS | MC2 OSEMs calibrated using MC_F | MC2 OSEM outputs were calibrated today
using MC_F to get the output values in microns.
This was done using |
|
17238
|
Mon Nov 7 20:00:37 2022 |
Anchal | Update | SUS | MC1 OSEMs output is weird | Following up, I tried to do this exercise
with MC1 and MC3. While MC3 shows expected
minute corrections to the previous value, |
 |
17240
|
Tue Nov 8 08:57:18 2022 |
rana | Update | SUS | MC2 OSEMs calibrated using MC_F | this measurement is not valid because of
the coil to sensor coupling that I mentioned
before. This is why I suggested you make |
|
17241
|
Tue Nov 8 10:23:42 2022 |
Anchal | Update | SUS | MC3 damping loop step responses | I tuned MC3 local damping gains by looking
at step responses in the DOF bassis. The
same procedure was followed as described |
 |
17242
|
Tue Nov 8 10:35:26 2022 |
Anchal | Update | SUS | IMC F2A test | This time the test was succesful but I
have reverted MC3 f2a filters back to with
Q=3, 7, and 10. The inital part of the test |
|
17245
|
Tue Nov 8 18:12:01 2022 |
Anchal | Update | SUS | MC2 OSEMs calibrated using MC_F | I reran this measurement at low frequency
0.1016 Hz. Following were the cts2um gain
changes: |
|
17246
|
Tue Nov 8 19:39:34 2022 |
Anchal | Update | SUS | MC3 OSEMs calibrated using MC_F | I did the same measurement for MC3 with
one difference that OSEMs report |
|
17248
|
Wed Nov 9 07:49:59 2022 |
rana | Update | SUS | MC2 OSEMs calibrated using MC_F | It would be good if you can post the uncertainties
with these measurements (and for generally
any measurements). This is so that we can |
|
17249
|
Wed Nov 9 11:07:16 2022 |
Anchal | Update | SUS | IMC test | Following configurations were kept today
morning:
|
|
17251
|
Wed Nov 9 20:01:38 2022 |
Anchal | Update | SUS | MC1 OSEMs output is weird | I took a coil to OSEM transfer function
for MC1 osems (LL, UR) today and again
the slope of the transfer function was -1.4 |
  |
17252
|
Wed Nov 9 20:29:20 2022 |
Anchal | Update | SUS | MC2 and MC3 set to undergo free swing test tonight | I have set a free swing test for MC2 and
MC3 to trigger at 1 am tonight. The test
should last for about 4.5 hrs upto 5:30 am. |
|
17254
|
Thu Nov 10 18:09:28 2022 |
rana | Update | SUS | MC WFS settings all weird | Today I found the MC WFS settings all weird.
Not only was the input slider set to zero,
but the filter bank outputs were off, and |
|
17256
|
Fri Nov 11 11:29:11 2022 |
Anchal | Update | SUS | MC1 OSEMs output is weird | Late elog; original time Thursday, Nov
10 16:00 2022
MC1 is using a new satellite |
|
17259
|
Fri Nov 11 19:20:23 2022 |
rana | Update | SUS | MC1 OSEMs output is weird | I
turned on the extra un-whitening filter (not |
|
17260
|
Fri Nov 11 19:47:04 2022 |
rana | Update | SUS | MC SUS were overdamped: damping gains all reduced | After clicking on the extra MC1 unwhitening
filter, I was going to retune the damping
gains to give a Q ~ 5 for the suspension. |
|
17264
|
Mon Nov 14 14:52:56 2022 |
Paco | Configuration | SUS | BHD SUS Coil output balance | [JC, Paco]
We installed a steering mirror
intersecting the BHD beam path and put the |
    |
17286
|
Fri Nov 18 17:00:15 2022 |
Anchal | Update | SUS | MC1 and MC3 OSEMs calibrated using MC_F | After the MC1 osem dewhitening was fixed,
I did the calibration of MC1 OSEM signals
using MC_F using this notebook. |
|
17289
|
Sun Nov 20 13:42:21 2022 |
Anchal | Update | SUS | IMC test | I repeated this test for the following
configuration:
PSL shutter closed at good |
|
17295
|
Mon Nov 21 18:33:05 2022 |
Anchal | Update | SUS | MC2 OSEMs calibrated using MC_F | Repeated this for MC2 using the error measurement
technique mentioned in 40m/17286
using this notebook. |
|
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 |
|
17310
|
Thu Nov 24 11:23:35 2022 |
Anchal | Update | SUS | Low noise state | I've turned off HEPA fan and all lights
at
PST: 2022-11-24 11:23:59.509949 PST |
|
17313
|
Fri Nov 25 15:35:23 2022 |
Anchal | Update | SUS | Low noise state | Turned off HEPA at:
PST: 2022-11-25 15:34:55.683645
PST |
|
17331
|
Sat Dec 3 10:13:56 2022 |
Anchal | Update | SUS | Low noise state | I've turned off HEPA fan and all lights
at:
PST: 2022-12-03 10:13:03.184705 |
|
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 |
|
17357
|
Tue Dec 13 23:49:17 2022 |
Anchal | Update | SUS | Low noise state | I've turned off HEPA fan and all lights
at:
PST: 2022-12-13 23:49:12.955214 |
|
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 |
|
17364
|
Fri Dec 16 22:06:55 2022 |
Anchal | Update | SUS | Low noise state | I've turned off HEPA fan and all lights
at:
PST: 2022-12-16 22:06:53.830911 |
|
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 |
 |
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 |
  |
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 |
|
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 |
|
17550
|
Wed Apr 19 15:12:01 2023 |
yuta | Summary | SUS | Coil dewhitening check for PRM | [Mayank, Paco, Yohanathan, Yuta]
We checked if coil dewhitening
switch is working by measuring transfer function |
|