ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17778
|
Fri Aug 11 20:44:00 2023 |
Koji | Update | PSL | CDS crash / PMC recovery and mystery / IFO recovery | [JC, Koji]
In the morning, JC came in and
found that c1sus had crashed. JC tried to |
|
|
17777
|
Fri Aug 11 14:06:34 2023 |
Hiroki | Update | LSC | Revised automated locking of FPMI | [Hiroki, Paco, Yuta]
As mentioned in elog
#17768, we are trying to lock |
|
|
17775
|
Thu Aug 10 20:19:40 2023 |
Hiroki | HowTo | CDS | Fixing error of "Unable to obtain measurement data" | [JC, Koji, Yuta, Hiroki]
When we tried to measure the spectrum
of C1:LSC-DARM_IN2 with the diaggui, |
|
|
17774
|
Thu Aug 10 19:52:47 2023 |
yuta | Summary | ALS | simultaneous hold and release of the arm (aka two arm ALS) | I just wanted to take the same time series
data I took back in 2012 (40m/6874).
ALS noise look much better than 2012, |
|
|
17773
|
Thu Aug 10 14:35:13 2023 |
Radhika | Update | AUX | XAUX out of loop error | [Radhika, Yuta, Hiroki, Paco]
During YAUX noise measurements,
we also locked IR and green lasers in xarm |
|
|
17772
|
Thu Aug 10 12:54:22 2023 |
Paco | Update | General | Excess noise on YALS BEAT | [Hiroki, Paco, Yuta, JC]
Hiroki realized the gain on the
AUX feedback loop was slightly high, which |
|
|
17771
|
Thu Aug 10 12:01:10 2023 |
Paco | Update | SUS | ETMX coil balancing and local damping redux | [Paco, yehonathan]
Following Yehonathan's work
from yesterday, I found the following coil |
|
|
17769
|
Thu Aug 10 11:33:47 2023 |
Deven Bowman | Update | LSC | A look at error signal of fused sensors | Prompted by the events documented in this
previous elog, I used the data I grabbed |
|
|
17768
|
Wed Aug 9 19:32:38 2023 |
Hiroki | Update | LSC | Automated locking of PSL frequency with ALSX | [Hiroki, Paco, Yuta]
Success |
|
|
17767
|
Wed Aug 9 15:02:45 2023 |
Yehonathan | Update | SUS | ETMX coil balancing | Upgrading the ETMX coil drivers calls for
new coil balancing.
XARM locking using ETMX actuation |
|
|
17766
|
Wed Aug 9 12:06:45 2023 |
Paco | Update | General | Excess noise on YALS BEAT | [Paco, yuta]
We found excess noise |
|
|
17765
|
Wed Aug 9 02:54:06 2023 |
Hiroki | Update | PSL | Installed PSL Flow speed sensor | [Paco, Hiroki]
Installed
two flow sensors on the PSL HEPA |
|
|
17764
|
Tue Aug 8 20:32:37 2023 |
Hiroki | Update | LSC | Automated locking of PSL frequency with ALSY | [Paco, Yuta, Hiroki]
We locked PSL frequency using ALSY |
|
|
17763
|
Tue Aug 8 20:13:55 2023 |
Deven Bowman | Update | LSC | Sensor fusion test with PRMI Lock | Yehonathan, Paco, and Hiroki helped lock
the interferomter into PRMI. While locked,
the sensing matrix was calaculated with |
|
|
17762
|
Tue Aug 8 10:27:22 2023 |
Stella Kraus | Update | Lab Organization | Moved HF2LI | We moved the Zurich instruments HF2LI to
CAML. IMG_7669.JPG |
|
|
17761
|
Tue Aug 8 01:07:52 2023 |
Hiroki | Update | PSL | Testing and wiring the PSL Flow speed sensor | For monitoring the statuses of the
PSL HEPA fans, we are planning to attach flow
speed sensors (D6F-V03A1) |
|
|
17760
|
Mon Aug 7 23:58:30 2023 |
Hiroki | Update | LSC | Stabler lock of sideband-resonant PRMI w/ 3f | [Paco, Yehonathan, Yuta, Hiroki]
Achieved
stabler lock of sideband-resonant |
|
|
17759
|
Mon Aug 7 14:02:52 2023 |
Radhika | Update | AUX | xend AUX fully locking with Moku:Go | Moku:Go
used for full locking of green laser - OLTF
to come
Picking up from |
|
|
17758
|
Mon Aug 7 11:25:50 2023 |
Paco | Update | Optical Levers | BS/PRM/SRM Oplev replaced HeNe | [JC, Paco]
We replaced the HeNe |
|
|
17757
|
Sat Aug 5 01:46:01 2023 |
Koji | Update | Optical Levers | BS/PRM/SRM Oplev dead | [Koij Hiroki]
While KA was working on the DAC
issue, BS/PRM/SRM Oplev died. |
|
|
17756
|
Sat Aug 5 01:42:19 2023 |
Koji | Update | PEM | c1sus DAC1/DAC2 negative side DAC outputs were isolated from the downstream chain | As reported already, we resolved the c1sus
DAC0 issue by introducing the differential
receivers for the DAC output CHs. |
9x |
|
17755
|
Sat Aug 5 01:13:06 2023 |
Hiroki | Update | LSC | Succeeded in locking sideband-resonant PRMI w/ 3f | [Yuta, Koji, Hiroki]
Succeeded
in locking sideband-resonant PRMI w/ 3f
We |
|
|
17754
|
Fri Aug 4 20:50:13 2023 |
Koji | Summary | CDS | The location where the wiper script is running | The raw frame file is stored in /frames
at fb. Before the disk space is flooded,
the wiper script deletes the old raw frame |
|
|
17753
|
Thu Aug 3 21:35:50 2023 |
Koji | Configuration | PEM | PSL Flow speed sensor channels added | As the preparation of the flow
sensor installation, I added two slow channels
via c1psl (Acromag IOC). |
|
|
17752
|
Thu Aug 3 20:00:59 2023 |
Hiroki | Update | Calibration | Calibrations of actuators after replacing Anti-Imaging modules | [Yuta, Hiroki]
Calibrated
the actuators after replacing anti-imaging |
|
|
17751
|
Thu Aug 3 17:27:07 2023 |
Koji | Update | CDS | Slow machine target folder clean up | I went to /cvs/cds/caltech/target and found
some folders for apparently old targets.
c0daqawg |
|
|
17749
|
Wed Aug 2 17:56:25 2023 |
Radhika | Summary | General | ADC/DAC Noise of Moku:GO [Reprinted elog from Ando Lab at University of Tokyo] | Repeating ADC/DAC
noise measurements
I carried |
|
|
17748
|
Wed Aug 2 17:17:37 2023 |
Koji | Update | PSL | IMC Locking (FIXED: Remote switching of PSL shutter is not working) | After the exploration of c1psl, the IMC
locking was not functioning well. It looked
like the MC autolocker issue. |
|
|
17746
|
Wed Aug 2 14:50:22 2023 |
Koji | Update | PSL | FIXED: Remote switching of PSL shutter is not working | [JC Koji]
c1vac was hard rebooted. This fixed
the PSL shutter issue. |
|
|
17745
|
Wed Aug 2 10:33:53 2023 |
JC | Update | BHD | BHD Platform Preparation. | BHD platform is estimated to stop baking
by the end of the day. We are following the
LIGO Procedure and baking at 150°C By |
|
|
17744
|
Wed Aug 2 03:30:22 2023 |
Hiroki | Update | LSC | Trials for sideband-resonant PRMI locking | [Yuta, Hiroki]
In
preparation for locking the PRFPMI, we tried |
|
|
17743
|
Tue Aug 1 21:52:46 2023 |
Hiroki | Update | PSL | Remote switching of PSL shutter is not working | [Yuta, Hiroki]
Remote
switching of PSL shutter is not working.
|
|
|
17742
|
Tue Aug 1 20:29:12 2023 |
Hiroki | Summary | General | ADC/DAC Noise of Moku:GO [Reprinted elog from Ando Lab at University of Tokyo] | This
post is reprinted from the elog of Ando
Lab at the University of Tokyo. |
|
|
17741
|
Tue Aug 1 15:36:05 2023 |
Deven Bowman | Update | LSC | Improved input matrix: sensor fusion | This elog post refers to this previous
post which details a PRMI lock where the
sensing matrix and OLTFs for MICH and PRCL were measured. |
7x |
|
17740
|
Tue Aug 1 14:26:11 2023 |
andrei | Update | PEM | RL for nonlinear controllers | Update
I have finished setting
up Neptune for easy access |
|
|
17739
|
Tue Aug 1 02:51:46 2023 |
Hiroki | Summary | BHD | Mode-matching breadboard for BHD OMCs | Mode-matching
breadboard has been constructed
I
have constructed the mode-matching breadboard |
|
|
17738
|
Mon Jul 31 22:25:07 2023 |
Koji | Update | PEM | FIXED: Strange behavior of ITMX and ITMY probably due to DAC issue | [Hiroki, Yehonathan, Yuta, Koji]
Summary
The |
|
|
17737
|
Mon Jul 31 16:04:54 2023 |
JC | Update | BHD | BHD Platform Preparation. | [JC]
I began to prepare the temporary clean
room where we will be putting together the |
|
|
17736
|
Mon Jul 31 15:46:03 2023 |
yuta | Update | SUS | Strange behavior of ITMX and ITMY probably due to DAC issue | I did the same test we did in 40m/17616
to see if DACs are working fine for ITMX
and ITMY. |
|
|
17735
|
Mon Jul 31 15:34:56 2023 |
JC | Update | BHD | BHD Platform Preparation. | [Maty, JC]
This morning, Maty and I proceeded
to work on the BHD Platform work. We rinsed |
|
|
17734
|
Sat Jul 29 00:44:57 2023 |
Koji | Update | PEM | Remarks on the IFO recovery after CDS restart. | I had a suspicion that some of the ITMX
coils were not properly working. So individual
coils of the 4 test masses were excited while |
|
|
17733
|
Sat Jul 29 00:08:35 2023 |
Hiroki | Update | PEM | Remarks on the IFO recovery after CDS restart. | [Koji, Hiroki]
We investigated the cause of the
unstable OPLEV damping in ITMX and found |
|
|
17732
|
Fri Jul 28 22:43:26 2023 |
JC | Update | BHD | BHD Platform Preparation. | BHD Platform
has been washed and set to dry over the weekend
Yesterday, I began |
|
|
17731
|
Fri Jul 28 12:11:45 2023 |
advait | Update | PEM | Seismometer heater and temp sensors | I added a heater circuit to the seismometer,
and moved the 4 channel temperature readout
circuit that I built in there as well. The |
|
|
17730
|
Fri Jul 28 00:27:17 2023 |
Koji | Update | PEM | ITMX issue continues | Even though the noise issue of an OSEM
was resolved, the issue with ITMX still continues.
OPLEV pitch servo can't be turned |
|
|
17729
|
Thu Jul 27 21:39:50 2023 |
Hiroki | Update | PEM | Remarks on the IFO recovery after CDS restart. | [Koji, Hiroki]
We
resotred the noisy ITMX UL sensor reported |
|
|
17728
|
Thu Jul 27 18:21:33 2023 |
Koji | Update | ALS | OLTFS of digital controller | Here is the OLTF from the model of the
system I made in Python. https://github.com/CaltechExperimentalGravity/LaserStabilization/blob/main/code/PlantSim/plant_model.py
|
|
|
17727
|
Thu Jul 27 17:03:57 2023 |
Koji | Summary | CDS | c1psl spare channel situation | I looked at the Acromag situation
of c1psl to prepare for the PSL air flow
speed sensor. |
|
|
17726
|
Thu Jul 27 12:11:57 2023 |
andrei | Update | PEM | RL for nonlinear controllers | Here is a rundown of my work so far on
RL controllers for the puck:
Environment: I implemented |
|
|
17725
|
Thu Jul 27 12:04:20 2023 |
advait | Update | PEM | Seismometer temperature sensors | As we move towards the goal of controlling
the temperature of the seismometer near the
X end, I am setting up hardware and interfaces |
|