| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17053
|
Tue Aug 2 01:10:26 2022 |
Koji | Update | IOO | WFS investigation | Continued to work on the WFS repair
Demod phase adjustment:
- Use the PDH signal to |
|
|
17054
|
Tue Aug 2 17:25:18 2022 |
Tega | Configuration | BHD | c1sus2 dolphin IPC issue solved | [Yuta, Tega, Chris]
We did |
|
|
17055
|
Wed Aug 3 15:01:13 2022 |
Koji | Update | General | Borrowed Dsub cables | Borrowed DSUB cables for
Juan's SURF project |
|
|
17056
|
Wed Aug 3 16:00:51 2022 |
yuta | Update | BHD | BHD fringe aligned with reduced LO and AS beam clipping | Last week, we could find an alignment which
realizes LO beam and AS beam both unclipped,
but it was not consistent with an alignment |
|
|
17057
|
Thu Aug 4 11:28:22 2022 |
Anchal | Update | PSL | FSSSlow/MCAutolocker issue (docker) | Added C1:IOO-MC_LOCK
to ALConfigMC.yml which solved the isse
with FSS Slow. We should tune the FSS Slow |
|
|
17058
|
Thu Aug 4 19:01:59 2022 |
Tega | Update | Computers | Front-end machine in supermicro boxes | Koji and JC looked around the lab today
and found some supermicro boxes which I was
told to look into to see if they have any |
|
|
17059
|
Thu Aug 4 21:58:18 2022 |
Koji | Update | IOO | WFS investigation | OK... It seems that all the 6 dof of the
IMC WFS servo loops were closed with some
condition... |
|
|
17060
|
Thu Aug 4 22:14:20 2022 |
Koji | Update | IOO | WFS investigation | Sensing matrix measurement
MCx_ASCyyy_EXC was shaken with
the amplitude of 3000 cnt. Measure the transfer |
|
|
17061
|
Thu Aug 4 22:14:38 2022 |
Koji | Update | IOO | WFS investigation | WFS/MCTRANS_QPD Power Spectra
Attachment 1: HEPA ON
WFS1/2 PIT/YAW Spectra are stabilized |
|
|
17062
|
Thu Aug 4 22:32:31 2022 |
Koji | Update | IOO | Upon leaving the lab (WFS investigation) | Upon leaving the lab:
- HEPA is ON at
the original speed (i.e. same speed at 5PM |
|
|
17063
|
Fri Aug 5 12:42:12 2022 |
Koji | Update | IOO | IMC WFS: Overnight observation | The IMC lock survived overnight and the
WFS servo loops kept it aligned. The IMC
was unlocked in the morning. |
|
|
17064
|
Fri Aug 5 17:03:31 2022 |
Yehonathan | Summary | General | Testing 950nm laser found in trash pile | I set out to test the actuation bandwidth
of the 950nm laser. I hooked the laser to
the output of the bias tee of PD testing |
|
|
17065
|
Mon Aug 8 14:47:10 2022 |
rana | Update | PSL | FSSSlow/MCAutolocker issue (docker) | can't we just go back to the old python
script that was working for many years, and
tested? I imagine that as soon as someone |
|
|
17066
|
Mon Aug 8 17:16:51 2022 |
Tega | Update | Computers | Front-end machine setup | Added 3 FE machines - c1ioo, c1lsc, c1sus
- to the teststand following the instructions
in elog15947. |
|
|
17067
|
Tue Aug 9 15:33:12 2022 |
yuta | Update | BHD | BHD fringe contrast improved from 43% to 74% | [Anchal, Yehonathan, Yuta]
We did the constrast measurement with |
|
|
17068
|
Tue Aug 9 15:50:22 2022 |
Koji | Update | BHD | BHD fringe contrast improved from 43% to 74% | For both 40m/17020
and 40m/17024,
what does the contrast mean if the numbers |
|
|
17069
|
Tue Aug 9 19:54:31 2022 |
yuta | Summary | LSC | FPMI locking tonight | [Tega, Anchal, Yuta]
We resored FPMI locking settings. |
|
|
17070
|
Wed Aug 10 15:33:59 2022 |
Cici | Update | General | Working Red Pitaya VNA | TL;DR: I am now able to inject a swept
sine and measure a transfer function with
python on my Red Pitaya! Attached is |
|
|
17071
|
Wed Aug 10 19:24:19 2022 |
rana | Update | General | Working Red Pitaya VNA |
Boom! |
|
|
17072
|
Wed Aug 10 19:36:45 2022 |
Koji | Bureaucracy | General | Lab cleaning and discovery | During the cleaning today, we found many
legacy lab items. Here are some policies
what should be kept / what should be disposed |
|
|
17073
|
Wed Aug 10 20:30:54 2022 |
Tega | Summary | SUS | Characterisation of suspension damping | [Yuta, Tega]
We diagnosed the suspension damping
of the IMC/BHD/recycling optics by kicking |
12x |
|
17074
|
Wed Aug 10 20:51:14 2022 |
Tega | Update | Computers | CDS upgrade Front-end machine setup | Here is a summary of what needs doing following
the chat with Jamie today.
|
|
|
17075
|
Thu Aug 11 16:48:59 2022 |
rana | Update | Computer Scripts / Programs | NDS2 updates | We had several problems with our NDS2 server
configuration. It runs on megatron, but I
think it may have had issues since perhaps |
|
|
17076
|
Thu Aug 11 17:15:33 2022 |
Cici | Update | General | Measuring AUX Laser UGF with Red Pitaya | TL;DR: Have successfully measured the UGF
of the AUX laser on my Red Pitaya! Attached
is one of my data runs (pdf + txt file). |
|
|
17077
|
Fri Aug 12 02:02:31 2022 |
Koji | Update | General | Power Outage Prep: nodus /home/export backup | Took the backup (snapshot) of /home/export
as of Aug 12, 2022
controls@nodus> |
|
|
17078
|
Fri Aug 12 13:40:36 2022 |
JC | Update | General | Preparing for Shutdown on Saturday, Aug 13 | [Yehonathan, JC]
Our first step in preparing for
the Shutdown was to center all the OpLevs. |
|
|
17079
|
Mon Aug 15 10:27:56 2022 |
Koji | Update | General | Recap of the additional measures for the outage prep | [Yuta Koji]
(Report on Aug 12, 2022)
We went around the lab |
|
|
17080
|
Mon Aug 15 15:43:49 2022 |
Anchal | Update | General | Complete power shutdown and startup documentation | All steps taken have been recorded here:
https://wiki-40m.ligo.caltech.edu/Complete_power_shutdown_2022_08 |
|
|
17081
|
Mon Aug 15 18:06:07 2022 |
Anchal | Update | General | c1vac issues, 1 pressure gauge died | [Anchal, Paco, Tega]
Disk full issue:
c1vac
was showing /var disk to be full. We moved |
|
|
17082
|
Mon Aug 15 20:09:18 2022 |
Koji | Update | General | c1vac issues, 1 pressure gauge died | - Disk Full: Just use the usual /etc/logrotate
thing
- Vacuum gauge |
|
|
17083
|
Tue Aug 16 18:22:59 2022 |
Tega | Update | Computers | c1teststand rack mounting for CDS upgrade | [Tega, Yuta]
I keep getting confused about the
purpose of the teststand. The view I am adopting |
|
|
17084
|
Wed Aug 17 01:18:54 2022 |
Koji | Update | General | Notice: SURF SUS test setup blocking the lab way | Juan and I built an analog setup to measure
some transfer functions of the MOS suspension.
The setup is blocking the lab way around |
|
|
17085
|
Wed Aug 17 07:35:48 2022 |
yuta | Bureaucracy | General | My wish list for IFO commissioning | FPMI related
- Better suspension damping
HIGH |
|
|
17086
|
Wed Aug 17 10:23:05 2022 |
Tega | Update | General | c1vac issues, pressure gauge replacement | - Disk full
I updated the configuration file
'/etc/logrotate.d/rsyslog' to set |
|
|
17087
|
Wed Aug 17 10:27:49 2022 |
Cici | Update | General | Locking X-arm AUX laser | TL;DR: Got the x-arm aux laser locked again
and took more data - my fit on my transfer
functions need improvement and my new method |
|
|
17088
|
Wed Aug 17 11:10:51 2022 |
rana | Update | Computers | c1teststand rack mounting for CDS upgrade | we want to be able to run SimPlant on the
teststand, test our new controls algorithms,
test watchdogs, and any other software upgrades. |
|
|
17089
|
Thu Aug 18 14:49:35 2022 |
Yehonathan | Summary | LSC | FPMI Sensitivity | {Yuta, Yehonathan}
We wrote a notebook found on Git/40m/measurements/LSC/FPMI/NoiseBudget/FPMISensitivity.ipynb
for calculating the MICH, DARM (currently |
|
|
17090
|
Thu Aug 18 16:35:29 2022 |
Cici | Update | General | UGF linked to optical gain! | TL;DR: When the laser has good lock, the
OLTF moves up and the UGF moves over!
----------------------------------------------------------- |
|
|
17091
|
Thu Aug 18 18:10:49 2022 |
Koji | Summary | LSC | FPMI Sensitivity | The overlapping plot of the calibrated
error and control signals gives you an approximately
good estimation of the freerun fluctuation, |
|
|
17092
|
Fri Aug 19 14:46:32 2022 |
Anchal | Update | SUS | Open loop transfer function measurements for local damping loops of BHD optics | [Anchal, Tega]
As a first step to characterize
all the local damping loops, we ran an open |
|
|
17093
|
Fri Aug 19 15:20:14 2022 |
Koji | Update | General | Notice: SURF SUS test setup blocking the lab way | The setup was (at least partially) cleared. |
|
|
17095
|
Fri Aug 19 15:36:10 2022 |
Koji | Update | General | SR785 C21593 CHA+ BNC broken | When Juan and I were working on the suspension
measurement, I found that CHA didn't
settle down well. |
|
|
17096
|
Sat Aug 20 20:26:10 2022 |
Anchal | Update | SUS | Open loop transfer function measurements for local damping loops of Core optics | I made measurements of old optics OLTF
today. I have reduced the file sizes of the
plots and data now. It is interesting that |
|
|
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 |
|
|
17098
|
Mon Aug 22 19:02:15 2022 |
Tega | Update | Computers | c1teststand rack mounting for CDS upgrade II | [Tega, JC]
Moved the rack to the location
of the test stand just behind 1X7 and plan |
|
|
17099
|
Tue Aug 23 14:59:15 2022 |
JC | Update | Tools | New Toolbox at Y-End | A new tool box has been placed at the Y-end!
Each drawer has its label so PLEASE
put the tools back in their correct location. |
|
|
17100
|
Tue Aug 23 22:30:24 2022 |
Tega | Update | Computers | c1teststand OS upgrade - I | [JC, Tega, Chris]
After moving the test stand front-ends,
chiara (name server) and fb1 (boot server) |
|
|
17101
|
Wed Aug 24 10:49:43 2022 |
Cici | Update | General | Measuring DFD output/X-arm laser PZT TF with Moku | We measured the TF of the X-arm laser PZT
using the Moku so we can begin fitting to
that data and hopefully creating a digital |
|
|
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, |
|
|
17103
|
Wed Aug 24 16:37:52 2022 |
Cici | Update | General | More DFD/AUX PZT resonance measurements | Some more measurements of the PZT resonances
(now zoomed in!) I'm adjusting parameters
on our model to try and fit to it by hand |
|