ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17811
|
Fri Aug 25 20:27:33 2023 |
Koji | Update | BHD | OMC Interface Aligner | A bit improved the design of OMC Interface
Aligner
The idea is...The OMC I/F aligner |
|
|
17810
|
Thu Aug 24 17:08:38 2023 |
Koji | Update | General | Excess noise on YALS BEAT | Paco took the data which means he already
had the beat note.
There is some chance that the beat |
|
|
17809
|
Thu Aug 24 13:10:17 2023 |
Murtaza | Summary | SUS | ETMX Testing | Koji suggested going through the following
steps to check the ETMX suspension:
1. Do a free swing test to obtain |
|
|
17808
|
Thu Aug 24 11:16:44 2023 |
rana | Update | General | Excess noise on YALS BEAT | With such a big temperature change, do
you still get a reasonable beat note frequency?
There's some previous elog of Koji I |
|
|
17807
|
Thu Aug 24 02:54:19 2023 |
Koji | Update | BHD | OMC Interface Aligner / BHD OFI arrangement | OMC Interface Aligner - (It's upside
down...)
BHD OFI arrangement |
|
|
17806
|
Wed Aug 23 19:47:53 2023 |
Koji | Update | CDS | Dolphin Fencing Investigation / Full CDS crash / nodus reboot / recovered all | Dolphin
Investigation
- I made a basic description on |
|
|
17805
|
Wed Aug 23 16:52:52 2023 |
Paco, Radhika, Murtaza | Update | ASS | Reducing XARM-ASS Errors | We're trying to reduce the demodulated
error signals after running the ASS script
for the XARM. |
|
|
17804
|
Wed Aug 23 16:11:03 2023 |
Paco | Update | General | Excess noise on YALS BEAT | [Paco]
Tuning the |
|
|
17803
|
Tue Aug 22 16:44:08 2023 |
Radhika | Summary | General | Moku Go/Pro delay measurements | Here are the results for Moku Go/Pro delay
measurements with the filter shapes removed
[Attachments 1, 2]. The PID |
|
|
17802
|
Tue Aug 22 15:56:53 2023 |
Koji | Update | General | BHD / Misc Inventory | Photodiode inventory: [OMC
ELOG 615] |
|
|
17801
|
Tue Aug 22 13:36:05 2023 |
Ian MacMillan | Update | SEI | Accelerometer calibration | [Ian, Torrey Cullen, Sander Vermeulen]
We are trying to calibrate one
of the Wilcoxon accelerometers from the cryo |
|
|
17800
|
Tue Aug 22 11:31:38 2023 |
paco | Update | Optical Levers | Storm and earthquake recovery -- ITMY restored | [JC, Koji-remote, paco]
ITMY stuck --> Shaken remotely and |
|
|
17799
|
Tue Aug 22 10:52:17 2023 |
Murtaza | Update | General | Acoustic Noise Spectrum | This is an update for 17794.
The UMIK 1 + REW combination gave
satisfactory results for creating the acoustic |
|
|
17798
|
Tue Aug 22 10:29:14 2023 |
paco | Update | Optical Levers | Storm and earthquake recovery -- ETMY oplev laser dead, ITMY stuck? | [JC, paco]
This morning we noted most optics
were tripped, probably as a result of a recent |
|
|
17797
|
Mon Aug 21 10:56:16 2023 |
JC | Update | VAC | Vacuum Loss of N2 Pressure | There was a loss of N2 pressure over this
weekend. When I came in to check the cylinder
pressures, I was able to hear a hissing sound |
|
|
17796
|
Fri Aug 18 16:07:38 2023 |
deven | Update | PEM | Seismometer heater and temp sensors | I've turned off the power supply. I've
attached a picture of the rack with the switch
that I flipped circled |
|
|
17795
|
Fri Aug 18 15:40:23 2023 |
andrei | Update | PEM | Seismometer heater and temp sensors | Dismantled the seismometer circuit
At Rana's request, Deven and
I have pulled all the wires out of the seismometer |
|
|
17794
|
Fri Aug 18 14:43:24 2023 |
Murtaza | Update | General | Acoustic Noise Spectrum of various lab spaces. (100Hz-10kHz) | dB(A) (A-weighted) scale and
the Noise Criterion (NC) scale are popularly
used in the United States for creating the |
|
|
17793
|
Thu Aug 17 15:24:46 2023 |
JC | Summary | Daily Progress | Preparing a clean room. | [Yuta, Yehonathan, JC]
The Frame for The |
|
|
17792
|
Wed Aug 16 20:34:22 2023 |
Deven | Update | LSC | PRMI OLTFs measured with new input matrix | After Yuta locked PRMI and measured the
sensing matrix, I changed the input matrix
to the following and measured the MICH and |
|
|
17791
|
Wed Aug 16 18:33:40 2023 |
yuta | Update | LSC | PRMI 1f/3f switching in both carrier/sideband resonant configurations | [JC, Yuta]
Transitioning from |
|
|
17790
|
Wed Aug 16 17:16:13 2023 |
Koji | Update | General | BHD / Misc Inventory | ==
BHD Components ==
BHD BS: |
11x |
|
17789
|
Wed Aug 16 16:42:22 2023 |
Radhika | Summary | General | Moku Go/Pro delay measurements | I measured the Moku:Go and Moku:Pro delay
using a Agilent 4395A network analyzer. I
considered the PID controller (0 dB gain); the |
|
|
17788
|
Wed Aug 16 12:49:37 2023 |
Deven | Update | LSC | PCA of noise spikes in sensor ASDs | Basic Idea
The idea behind this study was
that in several frequency ranges, there are |
6x |
|
17786
|
Tue Aug 15 17:11:17 2023 |
Koji | Update | IOO | FIXED: PMC issue | Summary
The problem in the PMC
Frequency Reference Card (35.5MHz) was fixed. |
7x |
|
17785
|
Tue Aug 15 09:56:52 2023 |
yuta | Update | IOO | PMC aligned, c1sus2 crashed | [JC, Yuta |
|
|
17784
|
Tue Aug 15 09:42:18 2023 |
andrei | Update | PEM | RL for nonlinear controllers | Update
In the past 2 weeks I have finalized
the pipeline for hyperparameter testing and |
|
|
17783
|
Tue Aug 15 00:44:29 2023 |
Koji | Update | General | ELOG slowness fixed | Elog was continuously accessed by net crawlers
or something similar. They continuously retrieve
random logs and also randomly hits the entries |
|
|
17782
|
Tue Aug 15 00:41:17 2023 |
Koji | Update | IOO | PMC issue cont'd | I went down to the IFO hall and checked
the PMC situation. The freq mixer fixed on
the rack 1X1 had BNC-T, so the raw error |
|
|
17781
|
Mon Aug 14 15:16:40 2023 |
Koji | Update | IOO | PMC offset voltage issue fixed. IMC WFS recentered and offsets zeroed. | 1.
Well, it seems that the PMC error offset
issue still remains. |
|
|
17780
|
Mon Aug 14 14:38:04 2023 |
Yehonathan | Update | IOO | PMC offset voltage issue fixed. IMC WFS recentered and offsets zeroed. | {JC, Yehonathan}
When JC came this morning the IMC
was completely misaligned. After tweaking |
|
|
17779
|
Sat Aug 12 02:21:12 2023 |
Hiroki | Update | PSL | Calibrated PSL Flow speed sensor | [Koji, Hiroki]
Calibrated flow
sensor signals from [volt] to [m/s] and displayed |
|
|
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 |
|