ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
17025
|
Thu Jul 21 21:50:47 2022 |
Tega | Configuration | BHD | c1sus2 IPC update | IPC
issue still unresolved.
Updated shared memory tag so that |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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: |
|
|
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 |
|
|
17008
|
Fri Jul 15 22:36:04 2022 |
rana | Summary | LSC | FPMI with REFL/AS55 demod phase adjust | Very nice! |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
17001
|
Wed Jul 13 18:58:17 2022 |
Koji | Update | IOO | IMC suspecion | This is just my intuition but the IMC servo
seems not so optimized. I can increase the
servo gain by 6~10dB easily. And I couldn't |
|
|
17000
|
Wed Jul 13 17:30:19 2022 |
Koji | Update | CDS | Too huge script_archive | I wanted to check the script archive to
see some old settings. I found that the script archive |
|
|
16999
|
Wed Jul 13 13:30:48 2022 |
Yehonathan | Update | BHD | add Laser RIN to MICH budget | the main laser noise coupling for a Michelson
is because of the RIN, not the frequency
noise. You can measure the RIN, in MC trans |
|
|
16998
|
Wed Jul 13 13:26:44 2022 |
rana | Summary | Electronics | Electronics noise measurements | as I said to you yesterday, I
don't think image 2a shows the output
of the demod board. The output |
|
|
16997
|
Wed Jul 13 12:49:25 2022 |
Paco | Summary | SUS | SUS frozen | [Paco, JC, Yuta]
This morning, while investigating
the source of a burning smell, we turned |
|
|
16996
|
Wed Jul 13 10:54:39 2022 |
Yehonathan | Update | BHD | MICH AS55 noise budget | I fixed some mistakes in the budget:
1. The BS pendulum resonance was
corrected from 0.8Hz to 1Hz |
|
|
16995
|
Wed Jul 13 07:16:48 2022 |
JC | Update | Electronics | Checking Sorensen Power Supplies | [JC]
I went around 40m picking up any
Sorensens that were laying around to test |
|
|
16994
|
Tue Jul 12 19:46:54 2022 |
Paco | Summary | ALS | How (not) to take NPRO PZT transfer function | [Paco, Deeksha, rana]
Quick elog for this evening:
Rana disabled MC servo |
|
|
16993
|
Tue Jul 12 18:35:31 2022 |
Cici Hanna | Summary | General | Finding Zeros/Poles With Vectfit | Am still working on using vectfit to find
my zeros/poles of a transfer function - now
have a more specific project in mind, which |
|
|
16992
|
Tue Jul 12 14:56:17 2022 |
Tomislav | Summary | Electronics | Electronics noise measurements | [Paco, Tomislav]
We measured the electronics noise
of the demodulation board, whitening board, |
23x |
|
16991
|
Tue Jul 12 13:59:12 2022 |
rana | Summary | Computers | process monitoring: Monit | I've installed Monit
on megatron and nodus just now, and will
set it up to monitor some of our common processes. |
|
|
16990
|
Tue Jul 12 09:25:09 2022 |
rana | Update | IOO | IMC WFS | MC WFS
Demod board needs some attention. |
|
|
16989
|
Tue Jul 12 09:14:50 2022 |
rana | Update | BHD | MICH AS55 noise budget | Looking good:
I think the notches you
see in he measured noise are a clue as to |
|
|
16988
|
Mon Jul 11 19:29:23 2022 |
Paco | Summary | General | Finalizing recovery -- timing issues, cds, MC1 | [Yuta, Koji, Paco]
Restarting
CDS
We were having |
|
|
16987
|
Mon Jul 11 17:41:52 2022 |
Koji | HowTo | VAC | Startup after Power Outage | - Once the FRG gauge readings are back
(see next elog by Tega), I could open V1
to pump down the main vacuum manifold. |
|
|
16986
|
Mon Jul 11 17:25:43 2022 |
Tega | Update | VAC | fixed obsolete reference bug in serial_XGS600 service | Koji noticed that the FRG sensors were
not updating due to reference to an
obsolete modbusIOC_XGS service, which was |
|
|
16985
|
Mon Jul 11 15:26:12 2022 |
JC | HowTo | VAC | Startup after Power Outage | [Koji, Jc]
Koji and I began starting that
Vacuum system up. |
|
|
16984
|
Mon Jul 11 11:56:40 2022 |
he Yehonathan | Update | BHD | MICH AS55 noise budget | I calculated a noise budget for the MICH
using AS55 as a sensor. The calculation includes
closed-loop TF calculations. |
|
|
16983
|
Mon Jul 11 11:16:45 2022 |
JC | Summary | Electronics | Startup after Shutdown | [Paco, Yehonathan, JC]
We began starting up all the electronics
this morning beginning in the Y-end. After |
|
|
16982
|
Fri Jul 8 23:10:04 2022 |
Koji | Summary | General | July 9th, 2022 Power Outage Prep | The 40m team worked on the power outage
preparation. The detailed is summarized on
this wiki page. We will still be able to |
|