| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17002
|
Thu Jul 14 00:10:08 2022 |
yuta | Summary | LSC | FPMI with REFL/AS55 trial continued | [Paco, Koji, Yuta]
We managed to lock MICH using REFL55_Q
by setting the demodulation phases and offsets |
|
|
17003
|
Thu Jul 14 19:09:51 2022 |
rana | Update | General | EQ recovery | There was a EQ in Ridgecrest (approximately
200 km north of Caltech). It was around 6:20
PM local time. |
|
|
17004
|
Thu Jul 14 19:56:15 2022 |
rana | Update | IOO | mc wfs demod | It looks like Tomislav's measurements
of the WFS demod board noise were actually
of the cable that goes from the whitening |
|
|
17005
|
Fri Jul 15 12:21:58 2022 |
JC | Update | Electronics | Checking Sorensen Power Supplies | Of the 7 Sorenson Power Supplies I tested,
5 are working fine, 1 cannot output voltage
more than 20 Volts before shorting, and other |
|
|
17006
|
Fri Jul 15 16:20:16 2022 |
Cici Hanna | Update | General | Finding UGF | I have temporarily abandoned vectfit and
aaa since I've been pretty unsuccessful
with them and I don't need poles/zeroes |
|
|
17007
|
Fri Jul 15 19:13:22 2022 |
Paco | Summary | LSC | FPMI with REFL/AS55 demod phase adjust | [Yuta, Paco]
We first zero the offsets
in ASDC, AS55, REFL55, POX11, and POY11 when |
|
|
17008
|
Fri Jul 15 22:36:04 2022 |
rana | Summary | LSC | FPMI with REFL/AS55 demod phase adjust | Very nice! |
|
|
17009
|
Sat Jul 16 02:44:10 2022 |
Koji | Update | IOO | IMC servo tuning | I wasn't sure how the IMC servo was
optimized recently. We used to have the FSS
over all gain (C1:PSL-FSS_MGAIN) of +6dB |
|
|
17010
|
Mon Jul 18 04:42:54 2022 |
Anchal | Update | Calibration | Error propagation to astrophysical parameters from detector calibration uncertainty | We can calculate how much detector calibration
uncertainty affects the estimation of astrophysical
parameters using the following method: |
|
|
17011
|
Mon Jul 18 15:17:51 2022 |
Hang | Update | Calibration | Error propagation to astrophysical parameters from detector calibration uncertainty | 1. In the error propogation equation, it
should be \Delta \Theta = -H^{-1} M \Delta
\Lambda, instead of the fractional error. |
|
|
17012
|
Mon Jul 18 16:39:07 2022 |
Paco | Summary | LSC | FPMI locking procedure using REFL55 and AS55 | [Yuta, Paco]
In summary, we locked FPMI using
REFL55_I, REFL55_Q, and AS55_Q. The key to |
|
|
17013
|
Mon Jul 18 16:49:57 2022 |
Yehonathan | Update | BHD | add Laser RIN to MICH budget | I measured the RIN by taking the spectrum
of C1:MC_TRANS_SUMFILT_OUT and
dividing it by the mean count on that channel |
|
|
17014
|
Mon Jul 18 17:07:12 2022 |
yuta | Update | LSC | x4.12 added to ETMX coil outputs to balance with ETMY | To balance the actuation on ETMX and ETMY,
x4.12
was aded to C1:SUS-ETMX_(UL|UR|LR|LL|SD)COIL |
|
|
17015
|
Mon Jul 18 18:33:38 2022 |
Koji | Update | BHD | add Laser RIN to MICH budget | You should measure the coupling
by noise injection. Noise budgeting does
not need any modeling: |
|
|
17016
|
Mon Jul 18 21:41:42 2022 |
Anchal | Summary | LSC | FPMI locking procedure using REFL55 and AS55 | Now that you have found a working configuration,
I suggest we update CARM and DARM filter
banks so that they are used in locking those |
|
|
17017
|
Tue Jul 19 07:34:46 2022 |
Anchal | Update | Calibration | Error propagation to astrophysical parameters from detector calibration uncertainty | Addressing the comments as numbered:
Yeah, that's correct,
that equation normally |
|
|
17018
|
Tue Jul 19 16:00:34 2022 |
yuta | Configuration | BHD | Fast channels for BHD DCPDs now available in c1lsc but not in c1hpc | [Paco, Anchal-remote-support, Yuta]
We added fast channels to BHD DC
PDs. |
|
|
17019
|
Tue Jul 19 17:18:34 2022 |
JC | Update | Electronics | New Coil Driver on Rack 1X3 | [Yehonathan, JC]
Yehonathan and I began to put the
electronics on Rack 1X3. To do this, we had |
|
|
17020
|
Tue Jul 19 18:41:42 2022 |
yuta | Update | BHD | Contrast measurements for Michelson and ITM-LO | [Paco, Yuta]
We measured contrast of Michelson |
|
|
17021
|
Wed Jul 20 11:58:45 2022 |
Paco | Summary | General | Jenne laser kaput? | [Paco, Yehonathan, JC]
We were trying to setup the Jenne
laser to characterize the response of three |
|
|
17022
|
Wed Jul 20 14:12:07 2022 |
Paco | Summary | General | Jenne laser kaput! | [Koji, Yehonathan, Paco]
Koji pointed out that this laser
was always driven with a current driver (which |
|
|
17023
|
Wed Jul 20 15:58:52 2022 |
Koji | Summary | General | Jenne laser kaput! | For troubleshooting, the proper laser driver
(found beneath the AG network analyzer) was
connected. |
|
|
17024
|
Wed Jul 20 18:07:52 2022 |
Paco | Update | BHD | BHD MICH test | [Paco, Yuta, JC]
We did some easy tests on the BHD
readout in preparation for BHD MICH. With |
|
|
17025
|
Thu Jul 21 21:50:47 2022 |
Tega | Configuration | BHD | c1sus2 IPC update | IPC
issue still unresolved.
Updated shared memory tag so that |
|
|
17026
|
Fri Jul 22 15:05:26 2022 |
Tega | Configuration | BHD | c1sus2 shared memory and ADC fix | [Tega, Yuta]
We were able to fix the shared
memory issue by updating the receiver model |
|
|
17027
|
Fri Jul 22 17:43:19 2022 |
Koji | Update | General | Obtained a functional CRT | [Koji Paco]
Koji went to Downs and found a
CRT labeled "for 40m Rana?". So |
|
|
17028
|
Fri Jul 22 17:46:10 2022 |
yuta | Configuration | BHD | c1sus2 watchdog update and DCPD ERR channels | [Tega, Yuta]
We have added C1:HPC-DCPD_A_ERR and |
|
|
17029
|
Sun Jul 24 08:56:01 2022 |
Hang | Update | Calibration | Error propagation to astrophysical parameters from detector calibration uncertainty | Sorry I forgot to put tc & phic in
the example.
I modified astroFisherLib.py |
|
|
17030
|
Mon Jul 25 09:05:50 2022 |
Paco | Summary | General | Testing 950nm laser found in trash pile | [Paco, Yehonathan]
==== Late elog from Friday ====
Koji provided us with a QFLD-950-3S |
|
|
17031
|
Mon Jul 25 09:37:39 2022 |
Deeksha | Update | Electronics | Using the DFD to measure PZT TF | The DFD was setup to measure the change
in beatnote when excited. A long long (128in)
cable goes from the SR785 near the DFD all |
|
|
17033
|
Mon Jul 25 17:58:10 2022 |
Tega | Configuration | BHD | c1sus2 IPC dolphin issue update | From the 40m
wiki, I was able to use the instructions
here |
|
|
17034
|
Mon Jul 25 18:09:41 2022 |
Tega | Configuration | BHD | BHD Homodyne Phase control MEDM screen | [Paco, Tega, Yuta]
Today, we made a custom MEDM screen
for the BHD Homodyne Phase Control, which |
|
|
17035
|
Mon Jul 25 18:22:30 2022 |
Deeksha | Summary | Wiki | Measured the PZT TF Successfully | Measured the PZT beatnote using the setup
mentioned in elog post 17031. Attached is
the data taken from 10kHz to 1MHz, decadewise |
6x |
|
17036
|
Tue Jul 26 19:50:25 2022 |
Deeksha | Update | Computer Scripts / Programs | Vector fitting | Trying to vectfit to the data taken from
the DFD previously but failing horribly.
I will update this post as soon as I get |
|
|
17037
|
Tue Jul 26 20:54:08 2022 |
Paco | Update | BHD | BHD MICH test - LO phase control | [Yuta, Paco]
TL;DR
Successfully |
|
|
17038
|
Tue Jul 26 21:16:41 2022 |
Koji | Update | Computer Scripts / Programs | Vector fitting | I think the fit fails as the measurement
quality is not good enough.
|
|
|
17039
|
Wed Jul 27 14:39:04 2022 |
Deeksha | Update | Electronics | New and improved PZT TF data from the DFD | Paco and I messed around with the attenuation
of the scope and bandwidth of the IF. We
also replaced the BNC T's in the |
|
|
17040
|
Wed Jul 27 18:30:50 2022 |
yuta | Update | BHD | LO beam power at BHD DCPDs is significantly lower than expected | [Paco, Yehonathan, Yuta]
We measured power and counts at
BHD DCPDs with LO beam only and ITM single |
|
|
17041
|
Thu Jul 28 13:09:28 2022 |
yehonathan | Update | BHD | Mode matching considerations | The LO beam was found to have a power of
60uW, 10% of the power expected. We are pretty
sure about the expectation because the AS |
|
|
17042
|
Thu Jul 28 14:34:40 2022 |
Yehonathan | Update | BHD | LO beam power at BHD DCPDs is significantly lower than expected | {Yuta, Yehonathan}
We went to the BS table to check
the POP beam power. We first notice that |
|
|
17043
|
Thu Jul 28 15:11:59 2022 |
Koji | Update | CDS | Too huge script_archive | As a result of the following work, the
file volume of /cvs/cds
was reduced from 3.2TB to 2.2TB, |
|
|
17044
|
Thu Jul 28 16:51:55 2022 |
Tega | Update | BHD | Shaking test for LO beam AS beam to BHD DCPDs | [Yuta, Tega, Yehonathan]
To investigate the BHD power imbalance
and clipping issues, we did some shaking |
|
|
17045
|
Thu Jul 28 20:16:26 2022 |
Anchal | Update | BHD | Shaking test for LO beam AS beam to BHD DCPDs | Some insights from the inside vacuum situation:
The beam is an incident
near normal on PR2 close to the center of |
|
|
17046
|
Fri Jul 29 18:24:53 2022 |
Tega | Update | BHD | LO beam power improved by factor of 6 after LO and AS beam alignment | [Yuta, Tega]
From our previous work (elog 17044) |
|
|
17047
|
Fri Jul 29 20:21:11 2022 |
Koji | Update | PSL | FSSSlow/MCAutolocker issue (docker) | MCAutolocker/FSSSlow are not properly documented
and not properly working.
Tidy up the script and documentation, |
|
|
17048
|
Fri Jul 29 22:37:54 2022 |
Koji | Update | IOO | WFS investigation | I wanted to check what's wrong with
the WFS.
I played with MC2 misalignment |
|
|
17049
|
Sat Jul 30 10:38:12 2022 |
Anchal | Update | PSL | FSSSlow/MCAutolocker issue (docker) | The FSSSlow script was not properly documented
and it was not working, so I had to use one
that I knew worked from CTN. This scripts |
|
|
17050
|
Sat Jul 30 12:48:18 2022 |
Koji | Update | PSL | FSSSlow/MCAutolocker issue (docker) | > it only starts working when C1:IOO-MC_LOCK
is 1 and C1:PSL-FSS_SLOWLOOP is 1.
- OK. Your new MCAutolocker does |
|
|
17051
|
Mon Aug 1 17:19:39 2022 |
Cici | Summary | General | RPitaya Data on Jupyter Notebook | Have successfully plotted data from the
Red Pitaya on Jupyter Notebook! Have
lost years of my life fighting with PyQt. |
|
|
17052
|
Mon Aug 1 18:42:39 2022 |
Tega | Configuration | BHD | c1sus2 IPC dolphin issue update | [Yuta, Tega]
We decided to give the dolphin
debugging another go. Firstly, we noticed |
|