| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
17278
|
Thu Nov 17 12:24:48 2022 |
Paco | Configuration | Cameras | ITMX Camera -- attempt at fix | I found that an old BNC cable for ITMXF
video existed so I first tried swapping both
ends of the cable, one on the ITMX viewport |
|
|
17277
|
Thu Nov 17 11:24:39 2022 |
JC | HowTo | LSC | Locking MICH | [Yuta, JC]
Here is the Yuta's Alignment
Scheme from elog |
|
|
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 |
|
|
17275
|
Thu Nov 17 07:39:01 2022 |
JC | Configuration | Cameras | ITMX Camera | Coming in this morning, I found ITMX Camera
malfunctioning. |
|
|
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: |
|
|
17273
|
Wed Nov 16 15:09:08 2022 |
yuta | Update | BHD | BHD fringe contrast measured with unwhitening filters | BHD fringe visibility was measured again
with unwhitening filters on on BHDC_A and
B, which removed signal leakage to zero ( |
|
|
17272
|
Wed Nov 16 12:53:36 2022 |
rana | Update | ASC | IMC WFS ongoing | In the middle of aportioning gains and
signs in the IMC WFS screen, so beware. More
updates soon. |
|
|
17271
|
Wed Nov 16 11:56:21 2022 |
Radhika | Update | PSL | PMC input beam aligned again, IMC | [Yuta, JC, Radhika]
PMC input beam was aligned again,
bringing transmission from 0.70 to ~0.75. |
|
|
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 |
|
|
17269
|
Tue Nov 15 17:58:00 2022 |
Paco | Configuration | Cameras | POP camera realignment after IFO alignment | [Paco, Yuta]
I swapped the 1 inch BS and lenses
along the POP beam to clear the apertures |
|
|
17268
|
Tue Nov 15 17:08:59 2022 |
Paco | Update | BHD | Request for estimates | [Yehonathan, Yuta, Paco]
We would like to estimate:
LO phase sensitivty (for |
|
|
17267
|
Tue Nov 15 16:34:55 2022 |
alex | Update | General | Debian with Sensoray | I have confirmed the ability to install
the sensoray drivers on Debian 11 in a virtual
machine environment. I will |
|
|
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 |
|
|
17265
|
Mon Nov 14 17:45:02 2022 |
yuta | Update | BHD | BHD DC PD unwhitening and removing cables to c1lsc | [Paco, Yuta]
We removed splitter to route BHD DC |
|
|
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 |
|
|
17263
|
Sat Nov 12 21:59:24 2022 |
Anchal | Frogs | Computer Scripts / Programs | FSS SLOW servo not running | I stopped the Docker PID script and started
the old python script on megatron. Instructions
on how to do this are here. |
|
|
17262
|
Fri Nov 11 20:59:13 2022 |
Chris | Frogs | Computer Scripts / Programs | FSS SLOW servo not running | The problem with trends was due to the
epics data collection process (standalone_edc)
that runs on c1sus. When all the FEs were |
|
|
17261
|
Fri Nov 11 20:01:56 2022 |
rana | Frogs | Computer Scripts / Programs | FSS SLOW servo not running | I was trying to debug why the NPRO PZT
is all over the place, and it turns out that
the new FSS SLOW script is not actually running. |
|
|
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. |
|
|
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 |
|
|
17258
|
Fri Nov 11 19:11:50 2022 |
JC | Update | General | WFS Whitening and Demod Boards | WFS Whitening and Demod boards were scavenged.
' |
|
|
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 |
|
|
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 |
|
|
17255
|
Thu Nov 10 20:46:32 2022 |
rana | Update | ASC | IMC WFS servo diagnosis | To check out the bandwidths and
cross-coupling in the WFS loops, I made a
script (attached) to step the offsets around, |
|
|
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 |
|
|
17253
|
Thu Nov 10 17:40:31 2022 |
Paco | Summary | Calibration | Calibration Plan | Plan to calibrate single arm actuation
strength
Lock single arm cavity |
|
|
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. |
|
|
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 |
|
|
17250
|
Wed Nov 9 14:19:18 2022 |
Tega | Update | CDS | fb1 OS migration | [Tega, Chris]
We migrated fb1 OS from the
teststand fb1 drive to the internal 2TB RAID |
|
|
17249
|
Wed Nov 9 11:07:16 2022 |
Anchal | Update | SUS | IMC test | Following configurations were kept today
morning:
|
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
17244
|
Tue Nov 8 16:56:33 2022 |
rana | Update | AUX | AUX PZT transfer function fitting + filtering | This looks really good to me. Rather than
fully invert the plant, what we would like
to do is now design a filter which allow |
|
|
17243
|
Tue Nov 8 11:18:39 2022 |
Radhika | Update | AUX | AUX PZT transfer function fitting + filtering | Here I describe efforts to cancel the AUX
laser PZT mechanical resonances from ~200
kHz-400kHz. While these may not be the resonances |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
17239
|
Mon Nov 7 21:57:42 2022 |
alex | Update | General | Sensoray | I have made little progress in getting
the sensoray driver installed on Donatella.
I have confirmed that it is indeed the reason |
|
|
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, |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
17233
|
Mon Nov 7 12:37:26 2022 |
Koji | Update | General | Borrowed the fiber tester for the OMC lab | I am borrowing the fiber illuminator /
fiber tester / VisiFault for the OMC lab.
It has been stored in the top drawer at the |
|
|
17232
|
Mon Nov 7 12:02:15 2022 |
Anchal | Update | SUS | IMC test with PSL shutter closed. | Following configurations were kept today
morning:
|
|
|
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 |
|
|
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 |
|