| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
Draft
|
Fri Dec 1 08:38:32 2023 |
JC | Update | BHD | BHD Platform Parts | Productive Day for C&B
Beam Dump Bases (D1102371), PEEK
Shims D1102372, Two 2.5 " pedestals, |
|
|
18004
|
Fri Dec 1 02:16:39 2023 |
Koji | Update | BHD | BHD Optics moved to BHD cleanroom / More OMC locking |
AS3/LO3 were assembled (Attachment
1)
The BHD Platform extension
plate was attached to the platform. This |
8x |
|
18003
|
Thu Nov 30 17:35:37 2023 |
Koji | Update | General | Missing PEM signals -> fixed | I
saw FB1 was pushed into the rack
(Attachment 1). Thank you very much for the |
|
|
18002
|
Thu Nov 30 15:08:23 2023 |
Radhika | Summary | Electronics | PRM UL sensor counts normal | [Murtaza, Radhika]
PRM UL counts normal
We |
|
|
18001
|
Thu Nov 30 14:25:42 2023 |
Radhika | Update | General | Lab Temp | YEND thermostat was restored from 67
°F ---> 69 °F. |
|
|
18000
|
Thu Nov 30 13:22:43 2023 |
Koji | Update | General | Lab Temp | The attached was the 2 days trend
Maybe I said X and Y moxed up in
the meeting? The Yend A/C is the good one. |
|
|
17999
|
Thu Nov 30 09:55:12 2023 |
JC | Update | General | Lab Temp | I made modifications to the thermostats
this morning in the lab:
X Arm |
|
|
17998
|
Wed Nov 29 18:45:54 2023 |
Koji | Update | General | 40m BHD current status / plan | In-vac
alignment / clipping
[Done] SUSs aligned: TTs |
|
|
17997
|
Wed Nov 29 12:53:25 2023 |
JC | Update | Frequency noise measurement | Spectrogram Using GWpy | I started using this new code that Rana
and I got from a random Git. It is for a
Live Specgram. I was finally able to get |
|
|
17996
|
Tue Nov 28 19:47:22 2023 |
Radhika | Update | BHD | BHD Optics moved to BHD cleanroom | AS2/AS3/BHD BS/LO3/LO4
moved to BHD cleanroom
Attachment |
|
|
17995
|
Tue Nov 28 18:28:10 2023 |
Koji | Update | BHD | BHD Optics Prep | Continued on the BHD Optics Prep:
The following mounts were prepared
(they are not 100% tightened yet) |
|
|
17994
|
Tue Nov 28 17:24:44 2023 |
Radhika | Update | General | LO/POP beams aligned | [Paco, Vittoria, Murtaza, Radhika]
LO/POP alignment
We |
7x |
|
17993
|
Tue Nov 28 14:37:00 2023 |
Koji | Update | General | Lab Temp | Lab temperature trend for 20 and
400 days:
- The lab temp significantly raised |
|
|
17992
|
Tue Nov 28 11:56:06 2023 |
Radhika | Update | General | Vertex optics alignment OK | Horizontal beam centering
along XARM
I tried to improve |
|
|
17991
|
Tue Nov 28 02:01:38 2023 |
Koji | Update | BHD | OMC locked | The OMC was locked with Moku Pro.
Attachment 1: Electrical
setup. The RF part of the REFL PD signal |
9x |
|
17990
|
Sun Nov 26 16:06:22 2023 |
Koji | Update | BHD | BHD/OMC table work | - Setup the fiber
protection and stray beam shields
- Replaced brand new wedged Y1-45P |
|
|
17989
|
Sat Nov 25 19:41:27 2023 |
Koji | Update | General | Lab Temp | Vertex is extremely hot. I'm reluctant
to go into the HEPA with clean garbings....
It seems that it started about |
|
|
17988
|
Wed Nov 22 19:55:21 2023 |
Koji | Update | BHD | BHD Platform Inventory |
PDR1V rotation stage was found
2"
pedestal post x Qty 1 / top and bottom vent
holes machined -> to be C&Bed
2.5" |
|
|
17987
|
Tue Nov 21 19:02:00 2023 |
Radhika | Update | General | All beam spot measurements after in-vacuum alignment work | [Yuta, Radhika]
PRY locked and PRM/PR2/PR3 |
|
|
17986
|
Fri Nov 17 17:27:19 2023 |
Vittoria | Update | General | PRMI Flashing Recovered; PRM OPLEV Centered | [Yuta, Vittoria, Radhika]
PRMI flashing recovered; |
|
|
17985
|
Fri Nov 17 13:06:27 2023 |
Koji | Update | BHD | BHD Platform Inventory | I went through the inventory list and the
parts in hand to figure out what
was still missing |
|
|
17984
|
Thu Nov 16 18:46:30 2023 |
Koji | Update | General | REFL path bug hunting | I took over the IFO after Radhika left.
She found the REFL beam earlier and the PRM
alignment offset for the refl beam on the |
|
|
17983
|
Thu Nov 16 18:29:52 2023 |
Radhika | Update | General | REFL path bug hunting | Today Yuta and I opened the BS chamber
and found that the REFL beam was misaligned
in pitch and yaw [Attachment 1]. We steered |
|
|
17982
|
Thu Nov 16 14:39:34 2023 |
JC | Update | BHD | Update on BHD Parts and Cleanroom Accomodations | Task Completed Today :
D2200122 Spacer Rings have
been machined and ready for C&B
The |
|
|
17981
|
Wed Nov 15 18:50:23 2023 |
Radhika | Update | General | REFL path bug hunting | [Paco, Vittoria, Radhika]
Yesterday and today I noticed that REFLDC/REFL |
|
|
17980
|
Wed Nov 15 17:37:17 2023 |
Koji | Update | SUS | PRM SUS UL PD not responding | Radhika reported that the PRM UL OSEM PD
is not responding. This PD has been identified
to have a shorting problem, but the short |
|
|
17979
|
Wed Nov 15 15:49:34 2023 |
JC | Update | Daily Progress | Input Chamber Door Removed | [Koji, Paco, JC]
The door of the Input |
|
|
17978
|
Tue Nov 14 18:30:45 2023 |
Radhika | Update | General | Beam spot position measurements after in-chamber alignment | [Murtaza, Paco, Radhika]
After the input beam path alignment
was complete (arm flashing recovered), we |
|
|
17977
|
Mon Nov 13 16:08:47 2023 |
JC | Update | CDS | FB1 fan replacement (fb1 alarm) | I
checked how FB1 is and it has no alerting
red LED anymore! Great |
|
|
17976
|
Mon Nov 13 16:01:17 2023 |
JC | Update | CDS | FB1 fan replacement (fb1 alarm) | [KA: Copied from JC's entry on Mon
Nov 13 14:15:40 2023]
|
|
|
17974
|
Mon Nov 13 03:14:43 2023 |
Koji | Update | BHD | OMC input beam alignment | To Do:
Set up the OMC refl optical
path and the refl PD
Set up a |
|
|
17973
|
Mon Nov 13 00:53:02 2023 |
Koji | Update | General | EP30-2 kit brought from Downs | EP30-2 Kit + Bonding Kit (= Two bottles
of silica powder) were returned to Modal
Lab @ Downs. |
|
|
17972
|
Mon Nov 13 00:34:56 2023 |
Koji | Update | BHD | OMC input beam alignment | The polarization and alignment of the fiber
for the OMC setup were adjusted. The polarization
ratio before the PBS was 50:1. Then, the |
|
|
17971
|
Fri Nov 10 20:19:13 2023 |
Koji | Summary | General | In-vacuum beam centering for input optics | Nice recovery of the lock!
Do you think the spot distance
at PR2 makes sense if we consider the dispersion? |
|
|
17970
|
Fri Nov 10 16:59:15 2023 |
Radhika | Summary | General | In-vacuum beam centering for input optics | [Murtaza, Paco, Shoki, Radhika]
IR arm cavity flashing |
|
|
17969
|
Thu Nov 9 15:18:50 2023 |
Radhika | Summary | General | In-vacuum beam centering for input optics | [Murtaza, Tomo, Paco, Radhika]
LInk to google
photos album for today. |
|
|
17968
|
Wed Nov 8 16:57:00 2023 |
Radhika | Summary | General | Beam centering strategies around vertex | [Murtaza, Tomo, Radhika]
In preparation for alignment of
vertex optics, went through the exercise |
|
|
17967
|
Wed Nov 8 15:14:39 2023 |
jeff | Update | General | Accelerometers | I borrowed a small accelerometer from 40m
and walked it to the cryo lab. It is pictured
in attachment 2 in its box. |
|
|
17966
|
Tue Nov 7 17:34:36 2023 |
yuta | Summary | General | Beam centering strategies around vertex | Here are some beam centering strategies...
Beam height around PRC:
- From our in-vac inspection |
|
|
17965
|
Tue Nov 7 16:43:49 2023 |
yuta | Summary | SUS | Untripping software watchdog | I made a script to untrip software watchdogs.
/opt/rtcds/caltech/c1/Git/40m/scripts/SUS/untripSoftWatchdog.py
|
|
|
17964
|
Tue Nov 7 16:29:23 2023 |
Radhika | Update | General | Photos and e-level measurements of ITMY/BS/ITMX tables | [Yuta, Vittoria, Radhika]
All photo documentation of the
open chambers can be found on the 40m |
|
|
17963
|
Mon Nov 6 23:37:13 2023 |
Koji | Update | General | Aux Laser: Interlock SWs and fiber | Thanks to Murtaza, now we have two emergency
switches for the aux laser. One is on the
PSL table, and the other is in the staging |
|
|
17962
|
Mon Nov 6 21:32:29 2023 |
Paco | Update | CDS | fb1 alarm | [Koji, paco]
First, ssh to fb1 and running sudo
dmidecode -t1 we get |
|
|
17961
|
Mon Nov 6 21:21:30 2023 |
Koji | Update | CDS | fb1 alarm |
FB1
has this "i" LED blinking and continuously
beeping. What's wrong?
|
|
|
17960
|
Mon Nov 6 12:27:39 2023 |
yuta | Update | ASC | Beam spot position measurements at low power | Beam
spot position measurements were done for
the first time in air pressure at low power. |
|
|
17959
|
Sun Nov 5 14:29:19 2023 |
aaron | Update | Equipment loan | N2 regulator returned to cryo | I retrieved the nitrogen pressure regulator
from x arm vacuum cabinet and returned it
to cryo. Reminder to replace the 40m regulator |
|
|
17958
|
Fri Nov 3 17:16:14 2023 |
Paco | Configuration | IOO | Low power IMC locked | [Paco, yuta]
We continued with the alignment
recovery by looking for arm cavity flashing. |
|
|
17956
|
Fri Nov 3 17:05:10 2023 |
Paco | Configuration | IOO | Low power IMC locked | [Paco, yuta]
We opened the PSL shutter and verified
the power behind the shutter is 92 mW. Then, |
|
|
17955
|
Fri Nov 3 13:10:58 2023 |
Koji | Update | VAC | FRG1/2/5 recalibrated at 1atm | As we found that some of the FRGs were
not well calibrated, Using the driver menu,
I've recalibrated the FRGs exposed |
|
|
17954
|
Fri Nov 3 10:18:21 2023 |
JC | Update | VAC | BHD OMC Vent | This morning, the goal was to open up the
chamber doors. Yesterday we attempted, but
we did not succeed. Here is a list of the |
|