| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17179
|
Sun Oct 9 13:49:49 2022 |
Koji | Update | IOO | IMC WFS / MC2 SUS glitch | The IMC and the IMC WFS kept running for
~2days. 👍
I wanted to look at the trand of |
|
|
17178
|
Fri Oct 7 22:45:15 2022 |
Anchal | Update | CDS | CDS Upgrade Status Update | [Chris, Anchal, JC, Paco, Yuta]
|
|
|
17177
|
Fri Oct 7 20:00:46 2022 |
Koji | Update | IOO | IMC WFS / MC2 SUS glitch | After the CDS upgrade team called for a
day (their work TBD), I took over the locked
IMC to check how it looked like. |
|
|
17176
|
Thu Oct 6 18:50:57 2022 |
Anchal | Summary | BHD | BH55 meas diff angle estimation and LO phase lock attempts | [Yuta, Paco, Anchal]
BH55 meas diff
We
estimated meas diff angle for BH55 today |
|
|
17175
|
Thu Oct 6 12:02:21 2022 |
Anchal | Update | CDS | CDS Upgrade Plan | [Chris, Anchal]
Chris and I discussed our plan
for CDS upgrade which amounts to moving new |
|
|
17174
|
Thu Oct 6 11:12:14 2022 |
Anchal | Update | BHD | BH55 RFPD installation complete | [Yuta, Paco, Anchal]
BH55 RFPD installation was still
not complete until yesterday because of a |
|
|
17173
|
Thu Oct 6 07:29:30 2022 |
Chris | Update | Computers | Successful takeover attempt with the new front ends | [JC, Chris]
Last night’s CDS
upgrade attempt succeeded in taking over |
|
|
17172
|
Tue Oct 4 21:00:49 2022 |
Chris | Update | Computers | Failed takeover attempt with the new front ends | [Jamie, JC, Chris]
Today we made a failed attempt
to take over the 40m hardware with the new |
|
|
17171
|
Mon Oct 3 15:19:05 2022 |
Paco | Update | BHD | LO phase noise and control after violin mode filters | [Anchal, Paco]
We started the day by taking a
spectrum of C1:HPC-LO_PHASE_IN1, |
|
|
17170
|
Mon Oct 3 13:11:22 2022 |
Yehonathan | Update | BHD | Some comparison of LO phase lock schemes | I pushed a notebook and a Finesse model
for comparing different LO phase locking
schemes. Notebook is on https://git.ligo.org/40m/bhd/-/blob/master/controls/compare_LO_phase_locking_schemes.ipynb, |
|
|
17169
|
Mon Oct 3 08:35:59 2022 |
Tega | Update | IMC | Adding IMC channels to frames for NN test | [Rana]
For the upcoming NN test on the
IMC, we need to add some more channels to |
|
|
17168
|
Sat Oct 1 13:09:49 2022 |
Anchal | Update | IMC | WFS turned on | I turned on WFS on IMC at:
PDT: 2022-10-01 13:09:18.378404
PDT |
|
|
17167
|
Fri Sep 30 20:18:55 2022 |
Paco | Update | BHD | LO phase noise with different actuation points | [Paco, Koji]
We took lo phase noise spectra
actuating on the for different optics-- LO1, |
|
|
17166
|
Fri Sep 30 18:30:12 2022 |
Anchal | Update | ASS | Model Changes | I updated c1ass model today to use PR2
PR3 instead of TT1 TT2 for YARM ASS. This
required changes in c1su2 too. I have split |
|
|
17165
|
Thu Sep 29 18:01:14 2022 |
Anchal | Update | BHD | BH55 LSC Model Updates - part IV | More model changes
c1lsc:
BH55_I and BH55_Q are now
being read at ADC_0_14 and ADC_0_15. The |
|
|
17164
|
Thu Sep 29 15:12:02 2022 |
JC | Update | Computers | Setup the 6 new front-ends to boot off the FB1 clone | [Jamie, Christopher, JC]
This morning we decided to label
the the fiber optic cables. While doing this, |
|
|
17163
|
Wed Sep 28 21:54:08 2022 |
Paco | Update | BHD | calibrated LO phase noise; update | Repeated the LO phase noise measurement,
this time with the LO - ITMY single
bounce, and a couple of fixes Koji |
|
|
17162
|
Wed Sep 28 19:15:56 2022 |
Koji | Update | General | Testing 950nm laser found in trash pile | I don't know what was wrong with the
past setup but the 950nm laser (QPHOTONICS
QFLD-950-3S) just worked fine up to ~300MHz |
|
|
17161
|
Wed Sep 28 16:37:26 2022 |
Paco | Update | BHD | calibrated LO phase noise; update | [yuta, paco]
Update; the high frequency ( >
100 Hz) drop is of course not real and comes |
|
|
17160
|
Tue Sep 27 10:50:11 2022 |
Paco | Update | BHD | calibrated LO phase noise | Locked LO phase to ITMX single bounce beam
at the AS port, using the DCPD (A-B) error
point and actuating on LO1 POS. For this |
|
|
17159
|
Mon Sep 26 11:39:37 2022 |
Paco | Update | BHD | BH55 RFPD installed - part II | [Paco, Anchal]
We followed rana's suggestion
for stress relief on the SMA joint in the |
|
|
17158
|
Fri Sep 23 19:07:03 2022 |
Tega | Update | Computers | Work to improve stability of 40m models running on teststand | [Chris, Tega]
Timing glitch investigation:
Moved dolphin |
|
|
17157
|
Fri Sep 23 19:04:12 2022 |
Anchal | Update | BHD | BH55 LSC Model Updates - part III | BH55
I further
updated LSC model today with following changes:
BH55 whitening switch binary |
|
|
17156
|
Fri Sep 23 18:31:46 2022 |
rana | Update | BHD | BH55 RFPD installed - part I | A design flaw in these initial LIGO RFPDs
is that the SMA connector is not strain releieved
by mounting to the case. Since it is only |
|
|
17155
|
Fri Sep 23 14:10:19 2022 |
Radhika | Update | BHD | BH55 RFPD installed - part I | [Radhika, Paco, Anchal]
I placed a lens in the B-beam
path to focus the beam spot onto the RFPD |
|
|
17154
|
Fri Sep 23 10:05:38 2022 |
JC | Update | VAC | N2 Interlocks triggered | [Chub, Anchal, Tega, JC]
After replacing an empty tank this
morning, I heard a hissing sound coming from |
|
|
17153
|
Thu Sep 22 20:57:16 2022 |
Tega | Update | Computers | build, install and start 40m models on teststand | [Tega, Chris]
We built, installed and started
all the 40m models on the teststand today. |
|
|
17152
|
Thu Sep 22 19:51:58 2022 |
Anchal | Update | BHD | BH55 LSC Model Updates - part II | I updated follwoing in teh rtcds models
and medm screens:
c1lsc
Added |
|
|
17151
|
Wed Sep 21 17:16:14 2022 |
Tega | Update | Computers | Setup the 6 new front-ends to boot off the FB1 clone | [Tega, JC]
We laid 4 out of 6 fiber cables
today. The remaining 2 cables are for the |
|
|
17150
|
Wed Sep 21 17:01:59 2022 |
Paco | Update | BHD | BH55 RFPD installed - part I | [Radhika, Paco]
Optical path setup
We
realized the DCPD - B beam path was already |
|
|
17149
|
Wed Sep 21 10:10:22 2022 |
Yehonathan | Update | CDS | C1SU2 crashed | {Yehonathan, Anchal}
Came this morning to find that
all the BHD optics watchdogs tripped. Watchdogs |
|
|
17148
|
Tue Sep 20 23:06:23 2022 |
Tega | Update | Computers | Setup the 6 new front-ends to boot off the FB1 clone | [Tega, Radhika, JC]
We wired the front-ends for power,
DAQ and martian network connections. Then |
|
|
17147
|
Tue Sep 20 18:18:07 2022 |
Anchal | Summary | SUS | ETMX, ETMY damping loop gain tuning | [Paco, Anchal]
We performed local damping loop
tuning for ETMs today to ensure all damping |
|
|
17146
|
Tue Sep 20 15:40:07 2022 |
yehonathan | Update | BHD | Trying doing AC lock | We resume the LO phase locking work. MICH
was locked with an offset of 80 cts. LO and
AS beams were aligned to maximize the BHD |
|
|
17145
|
Tue Sep 20 07:03:04 2022 |
Paco | Summary | General | Power Outage 220916 -- restored all | [JC, Tega, Paco ]
I would like to mention that during
the Vacuum startup, after the AUX pump was |
|
|
17144
|
Mon Sep 19 20:21:06 2022 |
Tega | Update | Computers | 1X7 and 1X6 work | [Tega, Paco, JC]
We moved the GPS network time server |
|
|
17143
|
Mon Sep 19 17:02:57 2022 |
Paco | Summary | General | Power Outage 220916 -- restored all | Restore lab
[Paco, Tega, JC,
Yehonathan]
We followed the instructions |
|
|
17142
|
Thu Sep 15 21:12:53 2022 |
Paco | Update | BHD | LO phase "dc" control | Locked the LO phase with a MICH offset=+91.
The LO is midfringe (locked using the A-B
zero crossing), so it's far from being |
|
|
17141
|
Thu Sep 15 16:19:33 2022 |
Yehonathan | Update | LSC | POX-POY noise budget | Doing POX-POY noise measurement as a poor
man's FPMI for diagnostic purposes. (Notebook
in /opt/rtcds/caltech/c1/Git/40m/measurements/LSC/POX-POY/Noise_Budget.ipynb) |
|
|
17140
|
Thu Sep 15 11:13:32 2022 |
Anchal | Summary | ASS | YARM and XARM ASS restored | With limited proof of working for a few
times (but robustly), I'm happy to report
that ASS on YARM and XARM is working now. |
|
|
17139
|
Wed Sep 14 15:40:51 2022 |
JC | Update | Treasure | Plastic Containers | There are brand new empty plastic containers
located inside the shed that is outside
in the cage. These can be used for organizing |
|
|
17138
|
Tue Sep 13 14:12:03 2022 |
Yehonathan | Update | BHD | Trying LO phase locking again | [Paco, Yehonathan]
Summary:
We |
|
|
17137
|
Thu Sep 8 16:03:25 2022 |
Yehonathan | Update | LSC | Realignment, arm locking, gains adjustments | {Anchal, Yehonathan}
We came this morning and the IMC
was misaligned. The IMC was realigned and |
|
|
17136
|
Thu Sep 8 12:01:02 2022 |
JC | Configuration | Lab Organization | Lab Organization | The floor cable cover has been changed
out for a new one. This is in Section X11. |
|
|
17135
|
Thu Sep 8 11:54:37 2022 |
JC | Configuration | Lab Organization | Lab Organization | The arms in the 40m laboratory have now
been sectioned off. Each arm has been divided
up into 15 sections. Along the Y arm, the |
|
|
17134
|
Wed Sep 7 14:32:15 2022 |
Anchal | Update | SUS | Updated SD coil gain to keep all coil actuation signals digitally same magnitude | The coil driver actuation strength for
face coils was increased by 13 times in LO1,
LO2, SR2, AS1, AS4, PR2, and PR3. |
|
|
17133
|
Tue Sep 6 17:39:40 2022 |
Paco | Update | SUS | LO1 LO2 AS1 AS4 damping loop step responses | I tuned the local damping gains for LO1,
LO2, AS1, and AS4 by looking at step responses
in the DOF basis (i.e. POS, PIT, YAW, and |
|
|
17132
|
Tue Sep 6 09:57:26 2022 |
JC | Summary | General | Lab cleaning | DB9 Cables have been assorted and placed
behind the Y-Arm. Long BNC Cables and Ethernet
Cables have been stored under the Y-Arm. |
|
|
17131
|
Fri Sep 2 15:40:25 2022 |
Anchal | Summary | ALS | DFD cable measurements | [Anchal, Yehonathan]
I laid down another temporary cable
from Xend to 1Y2 (LSC rack) for also measuring |
|
|
17130
|
Fri Sep 2 15:35:19 2022 |
Anchal | Update | General | Along the Y arm part 2 | [Anchal, Radhika]
The cables in USPS open box were
important cables that are part of the new |
|