| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15881
|
Mon Mar 8 19:22:56 2021 |
rana | Summary | SUS | IMC suspension characterization | Herewith,
I describe an adventure |
|
|
15884
|
Tue Mar 9 10:57:06 2021 |
Paco, Anchal | Summary | IMC | XARM lock and POX spectra | [Paco, Anchal]
- Upon arrival, MC is locked, and
we can see light in MON5 (PRM) (usually dark). |
|
|
15885
|
Tue Mar 9 12:41:29 2021 |
Koji | Summary | Electronics | Investigation on the invacuum Dsub cables | I believe the aLIGO style invac dsub cables
and the conventional 40m ones are incompatible.
While the aLIGO spec is that Pin1 |
|
|
15887
|
Tue Mar 9 14:37:26 2021 |
gautam | Summary | SUS | PRM suspension | The PRM got tripped ~5AM this morning.
The cause is unclear - the seismometer reports
elevated activity ~10 minutes before the |
|
|
15889
|
Tue Mar 9 15:22:56 2021 |
Koji | Summary | SUS | PRM suspension | I just saw the PRM watchdog tripped
at ~15:20 local (23:20UTC). I restored
the PRM but I saw only the side watchdog |
|
|
15893
|
Wed Mar 10 11:46:22 2021 |
Paco, Anchal | Summary | IMC | IMC free swinging prep | [Paco, Anchal]
# Initial State
- MC is locked. The PRM monitor shows |
|
|
15895
|
Wed Mar 10 15:00:16 2021 |
gautam | Summary | IMC | IMC free swinging prep | Did you fix this issue? It is helpful to
post a screenshot of the offending MEDM screen
in addition to witticisms. The elog says |
|
|
15896
|
Wed Mar 10 15:29:58 2021 |
Anchal | Summary | IMC | IMC free swinging prep | No we didn't fix the issue. We'll
post some screenshots tomorrow. From "sitemap>Shutter>PSL"
we meant in Shutter medm window, we clicked |
|
|
15897
|
Wed Mar 10 15:35:25 2021 |
Paco, Anchal | Summary | IMC | IMC free swinging experiment set to trigger at 5:00 am | A tmux session named "MCFreeSwingTest"
will run on Rossa. This session is running
script scripts/SUS/freeSwingMC.py (also attached) |
|
|
15901
|
Thu Mar 11 02:10:06 2021 |
Koji | Summary | BHD | BHD Platform vertical dimentions | Stephen and I discussed the nominal heights
of the BHD platform components.
The beam height from the |
|
|
15907
|
Fri Mar 12 03:08:23 2021 |
Koji | Summary | SUS | Coil Rs & Ls for PRM/BS/SRM | Summary
Per Gautam's request, I've
checked the coil resistances and inductances. |
|
|
15913
|
Fri Mar 12 12:32:54 2021 |
gautam | Summary | SUS | Coil Rs & Ls for PRM/BS/SRM | For consistency, today, I measured both
the BS and PRM actuator balancing using the
same technique and don't find as serious |
|
|
15914
|
Fri Mar 12 13:01:43 2021 |
rana | Summary | SUS | Coil Rs & Ls for PRM/BS/SRM | ugh. sounds bad - maybe a short. I suggest
measuring the inductance; thats usually a
clearer measurement of coil health |
|
|
15915
|
Fri Mar 12 13:48:53 2021 |
gautam | Summary | SUS | Coil Rs & Ls for PRM/BS/SRM | I didn't repeat Koji's measurement,
but he reports the expected ~3.2mH per coil
on all the BS and PRM coils. |
|
|
15916
|
Fri Mar 12 18:10:01 2021 |
Anchal | Summary | Computer Scripts / Programs | Installed cds-workstation on allegra | allegra had fresh Debian 10 installed on
it already. I installed cds-workstation packages
(with the help of Erik von Reis). I checked |
|
|
15919
|
Mon Mar 15 08:55:45 2021 |
Paco, Anchal | Summary | training | | [Paco, Anchal]
Found IMC locked upon arrival.
Since
"allegra" was set up as an additional |
|
|
15950
|
Sun Mar 21 19:31:29 2021 |
rana | Summary | Electronics | RTL-SDR for monitoring RF noise / interference | When we're debugging our RF system,
either due to weird demod phases, or low
SNR, or non-stationary noise in the PDH signals, |
|
|
15966
|
Thu Mar 25 16:02:15 2021 |
gautam | Summary | SUS | Repeated measurement of coil Rs & Ls for PRM/BS | Method
Since I am mainly concerned with
the actuator part of the OSEM, I chose to |
|
|
15971
|
Sun Mar 28 14:16:25 2021 |
Anchal | Summary | SUS | MC3 new Input Matrix not providing stable loop | Rana asked us to write out here the new
MC3 input matrix we have calculated along
with the old one. The new matrix is not working |
|
|
15973
|
Mon Mar 29 17:07:17 2021 |
gautam | Summary | SUS | MC3 new Input Matrix not providing stable loop | I suppose you've tried doing the submatrix
approach, where SIDE is excluded for the
face DoFs? Does that give a better matrix? |
|
|
15981
|
Wed Mar 31 03:56:37 2021 |
Koji | Summary | Electronics | A bunch of electronics received | We have received 9x 18bit DAC adapter boards
(D1000654) |
|
|
15989
|
Thu Apr 1 23:55:33 2021 |
Koji | Summary | General | HEPA AC cord replacement | I think
the PSL HEPA (both 2 units) are not running.
The switches were on. And the variac was |
|
|
15992
|
Fri Apr 2 15:17:23 2021 |
gautam | Summary | General | HEPA AC cord replacement | From the last failure, I had ordered 2
extra capacitors (they are placed on top
of the PSL enclosure above where the capacitors |
|
|
16002
|
Tue Apr 6 21:17:04 2021 |
Koji | Summary | General | PSL HEPA investigation | - Last week we found both of the PSL HEPA
units were not running.
- I replaced the capacitor of the |
|
|
16016
|
Mon Apr 12 08:32:54 2021 |
Anchal, Paco | Summary | PSL | PMC unlocked at 2pm on Sunday; ~ Restored | PMC lost lock between 21:00 and 22:00 UTC
on April 11th as seen in the summary pages:
https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20210411/psl/#gallery-4 |
|
|
16019
|
Mon Apr 12 18:34:26 2021 |
Yehonathan | Summary | PSL | PMC unlocked at 2pm on Sunday; ~ Restored | PMC lost lock again at around 16:00 April
12. I was able to lock it again but the transmission
is only 0.6 now and REFL is 0.14. |
|
|
16060
|
Wed Apr 21 10:59:07 2021 |
rana | Summary | Cameras | note on new GigE cam @ 1064 | Note
from Stephen on more sensitive Baslers. |
|
|
16070
|
Thu Apr 22 01:42:38 2021 |
Koji | Summary | Electronics | HV Supply Comparison | New HV power supply from Company 'M'
has been delivered. So I decided to compare
the noise levels of some HV supplies in the |
|
|
16095
|
Thu Apr 29 11:51:27 2021 |
Anchal | Summary | LSC | Start of measuring IMC WFS noise contribution in ar cavity length noise | Tried locking the arms
Ran IFO > Configure
> ! (YARM) > Restore YARM. Nothing |
|
|
16101
|
Thu Apr 29 17:51:19 2021 |
Anchal | Summary | LSC | Start of measuring IMC WFS noise contribution in arm cavity length noise | t Both arms were locked simply by using
IFO > Configure > ! (YARM) > Restore
YARM. I had to use ASS to improve the TRX/TRY |
|
|
16104
|
Fri Apr 30 00:18:40 2021 |
gautam | Summary | LSC | Start of measuring IMC WFS noise contribution in arm cavity length noise | This is the actuator calibration.
For the error point calibration, you have
to look at the filter in the calibration |
|
|
16113
|
Mon May 3 18:59:58 2021 |
Anchal | Summary | General | Weird gas leakagr kind of noise in 40m control room | For past few days, a weird sound of decaying
gas leakage comes in the 40m control room
from the south west corner of ceiling. Attached |
|
|
16115
|
Mon May 3 23:28:56 2021 |
Koji | Summary | General | Weird gas leakagr kind of noise in 40m control room | I also noticed some sound in the control
room. (didn't open the MP3 yet)
I'm afraid that the hard disk |
|
|
16125
|
Thu May 6 16:13:39 2021 |
Anchal | Summary | IMC | Angular actuation calibration for IMC mirrors | Here's my first attempt at doing angular
actuation calibration for IMC mirrors using
the method descibed in /users/OLD/kakeru/oplev_calibration/oplev.pdf |
|
|
16128
|
Mon May 10 10:57:54 2021 |
Anchal, Paco | Summary | Calibration | Using ALS beatnote for calibration, test | Test details:
We
locked both arms and opened the shutter for
Yend green laser.
After toggling |
|
|
16133
|
Wed May 12 11:45:13 2021 |
Anchal, Paco | Summary | SUS | New IMC Settings are miserable | We picked a few parameters from 40m summary
page and plotted them to see the effect of
new settings. On April 4th, old settings |
|
|
16157
|
Mon May 24 19:14:15 2021 |
Anchal, Paco | Summary | SUS | MC1 Free Swing Test set to trigger | We've set a free swing test to trigger
at 3:30 am tomorrow for MC1. The script for
tests is running on tmux session named 'freeSwingMC1' |
|
|
16158
|
Mon May 24 20:55:00 2021 |
Koji | Summary | BHD | How to align two OMCs on the BHD platform? | Differential
misalignment of the OMCs
40m BHD will employ two OMCs on |
|
|
16159
|
Tue May 25 10:22:16 2021 |
Anchal, Paco | Summary | SUS | MC1 new input matrix calculated and uploaded | The test was succesful and brought back
the IMC to lock point at the end.
We calculated new input matrix |
|
|
16161
|
Tue May 25 17:42:11 2021 |
Anchal, Paco | Summary | ALS | ALS Single Arm Noise Budget | Here is our first attempt at a single-arm
noise budget for ALS.
Attachment 1 shows |
|
|
16164
|
Thu May 27 11:03:15 2021 |
Anchal, Paco | Summary | ALS | ALS Single Arm Noise Budget | Here's an updated X ARM ALS noise budget.
Things to remember:
Major
mistake we were making earlier was that we |
|
|
16168
|
Fri May 28 17:32:48 2021 |
Anchal | Summary | ALS | Single Arm Actuation Calibration with IR ALS Beat | I attempted a single arm actuation calibration
using IR beatnote (in the directions of soCal
idea for DARM calibration) |
|
|
16171
|
Tue Jun 1 16:55:32 2021 |
Anchal, Paco | Summary | ALS | Single Arm Actuation Calibration with IR ALS Beat | Rana suggested in today's meeting to
put in a notch filter in the XARM IR PDH
loop to avoid suppressing the excitation |
|
|
16174
|
Wed Jun 2 09:43:30 2021 |
Anchal, Paco | Summary | SUS | IMC Settings characterization | Plot description:
We
picked up three 10 min times belonging to
the three different configurations:
'Old |
|
|
16175
|
Wed Jun 2 16:20:59 2021 |
Anchal, Paco | Summary | SUS | IMC Suspension gains reverted to old values | Following the conclusion, we are reverting
the suspension gains to old values, i.e.
|
|
|
16179
|
Thu Jun 3 17:35:31 2021 |
Anchal | Summary | IMC | Fixed medm button | I fixed the PSL shutter button on Shutters
summary page C1IOO_Mech_Shutter.adl. Now
PSL switch changes C1:PSL-PSL_ShutterRqst |
|
|
16190
|
Mon Jun 7 15:37:01 2021 |
Anchal, Paco, Yehonathan | Summary | Cameras | Mon 7 in Control Room Died | We found Mon7 in control room dead today
afternoon. It's front power on green
light is not lighting up. All other monitors |
|
|
16192
|
Tue Jun 8 11:40:53 2021 |
Anchal, Paco | Summary | ALS | Single Arm Actuation Calibration with IR ALS Beat | We attempted to simulate "oscillator
based realtime calibration noise monitoring"
in offline analysis with python. This helped |
|
|
16194
|
Wed Jun 9 11:46:01 2021 |
Anchal, Paco | Summary | AUX | Xend Green Laser PDH OLTF measurement | We measured the Xend green laser PDH Open
loop transfer function by following method:
We first measured the feedback |
|
|
16196
|
Wed Jun 9 18:29:13 2021 |
Anchal, Paco | Summary | ALS | Check for saturation in ITMX SOS Driver | We did a quick check to make sure there
is no saturation in the C1:SUS-ITMX_LSC_EXC
analog path. For this, we looked at the SOS |
|