| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
17953
|
Thu Nov 2 14:18:04 2023 |
yuta | Summary | SUS | New MEDM screens and misalignment scheme in the era of software watchdogs | New
watchdog and suspension summary MEDM screens
were made, and IFO_ALIGN screen was updated. |
|
|
17952
|
Thu Nov 2 12:06:49 2023 |
JC | Update | VAC | BHD OMC Vent | After swappiong out the cylinders, I went
to review the pressure to check the rate
of the N2, but It looks like |
|
|
17951
|
Thu Nov 2 08:59:11 2023 |
JC | Update | VAC | BHD OMC Vent | [Murtaza, JC]
We started preperation of the vent
at 7:30 am. |
|
|
17950
|
Wed Nov 1 19:13:48 2023 |
Koji | Update | SUS | SUS medm screen update | We noticed that the alignment offset indicator
of the suspension screen only responded to
the ON/OFF switches. It was the source of |
|
|
17949
|
Wed Nov 1 19:10:17 2023 |
yuta | Summary | SUS | Software watchdog implemented in BHD optics, and modified other ones | [Koji, Yuta]
We
implemented software watchdog for BHD optics. |
|
|
17948
|
Wed Nov 1 18:52:28 2023 |
Koji | Update | SUS | c1auxey1 confusion | [Koji, Yuta]
Yuta was working on the watchdog
unification for all the suspensions. He reached |
|
|
17947
|
Wed Nov 1 18:10:03 2023 |
Koji | Update | General | Ready for the vent | We
are ready for the vent
Lasers: |
|
|
17946
|
Wed Nov 1 17:02:33 2023 |
Paco | Update | BHD | PSL power lowered | I measured 883 mW of PSL
power before the PSL Shutter. I then set
the waveplate AXIS 1 to 36.82 deg to make |
|
|
17945
|
Wed Nov 1 12:28:28 2023 |
yuta | Update | ASC | Beam spot position measurements before the vent | Beam spot position measurements were done,
oplevs aligned.
Attachment #1 shows |
|
|
17944
|
Wed Nov 1 10:58:55 2023 |
Paco | Update | General | BHD OMC Vent | Update Wed Nov 1 10:58:48 2023
All vertex suspensions are now
under software watchdog logic. I tested all |
|
|
17943
|
Tue Oct 31 21:09:15 2023 |
Koji | Update | BHD | OMC bond rework | We came back to the OMC 24 hours later
and found the
bonding work yesterday went well. |
|
|
17942
|
Tue Oct 31 17:42:45 2023 |
Paco | Update | General | BHD OMC Vent | [Koji, Paco]
WE NEED TO |
|
|
17941
|
Tue Oct 31 17:27:27 2023 |
Paco | Update | SUS | ETMX software watchdog | [Koji, Paco, Yuta]
We implemented the ETMX software watchdog
"level 1", meaning the logic disables |
|
|
17940
|
Tue Oct 31 17:27:09 2023 |
Koji | Update | SUS | ETMX POS unstable when misaligned | [Koji Paco]
We decided to invert the signs
of the misalignment offset for ETMX to see |
|
|
17939
|
Tue Oct 31 16:25:29 2023 |
Koji | Update | SUS | ETMX POS unstable when misaligned | I noticed that there was an oscillating
spot on the ITMX face camera image. I tracked
the source down and found it was the motion |
|
|
17938
|
Mon Oct 30 19:20:16 2023 |
Koji | Summary | General | BHD Inventory | Prepared the following components around
the staging clean booth:
SOS 2"->3" |
|
|
17937
|
Mon Oct 30 19:11:58 2023 |
Koji | Update | ASC | MoIs for the BHD SOSs | From the ITMX window, I confirmed that
PR2 is using the original metal sleeve and
the optic is 3/8" thick. (See Attachment |
|
|
17936
|
Mon Oct 30 18:04:46 2023 |
Paco | Update | SUS | BS Oplev check | I measured the Oplev PIT/YAW OLTFs and
adjusted the gains to get 0.1 to ~ 4 Hz feedback
as is recommended |
|
|
17935
|
Mon Oct 30 15:47:16 2023 |
Koji | Update | BHD | OMC bond rework | [JC Koji]
We successfully applied EP30-2
on the OMC #1. |
8x |
|
17934
|
Mon Oct 30 14:29:20 2023 |
yuta | Update | ASC | Beam spot position measurements with updated moment of inertia | Beam
spot position measurements were done again
using updated estimate of moment of inertia. |
|
|
17933
|
Mon Oct 30 13:28:28 2023 |
Koji | Update | BHD | Epoxy removal | [JC Koji]
In the preparation of the OMC bond
rework, we removed the remaining bond layer |
|
|
17932
|
Sun Oct 29 21:09:23 2023 |
Koji | Update | BHD | OMC cable bracket delamination | [JC, Koji]
While adjusting the kinematic mount,
we noticed that the OMC cable bracket was |
|
|
17931
|
Sun Oct 29 21:01:18 2023 |
Koji | Update | BHD | Integration of the BHD platform and an OMC | [JC, Koji]
Integration
of the BHD platform and an OMC |
|
|
17930
|
Sat Oct 28 18:07:37 2023 |
Koji | Update | ASC | MoIs for the BHD SOSs | I checked Solidworks models to see the
mass/moment of inertia for the BHD SOS masses.
The mass/MoI calculation includes |
|
|
17929
|
Sat Oct 28 18:04:43 2023 |
Koji | Update | General | EP30-2 kit brought from Downs | EP30-2 kit brought from Downs on Oct 27,
2023. Stephen said he would take care of
the property (location) record. |
|
|
17928
|
Sat Oct 28 02:33:22 2023 |
yuta | Update | ASC | Beam spot position measurements with updated demodulation method | Beam
spot position measurements were done again
using updated demodulation method. |
|
|
17927
|
Fri Oct 27 17:37:26 2023 |
yuta | Update | ASC | Beam spot position measurements with sign | Beam
spot position measurements were done again
with the correct sign on the mis-centering. |
|
|
17926
|
Fri Oct 27 13:30:16 2023 |
rana | Update | ASC | Beam spot position measurements | I looked at this code and it is a little
untrustworthy. The demod is not being done
correctly so there can easily be some aliasing |
|
|
17925
|
Thu Oct 26 21:37:08 2023 |
yuta | Update | ASC | Beam spot position measurements | [Begüm, Paco, Yuta]
Beamspot position |
|
|
17924
|
Thu Oct 26 19:40:57 2023 |
Radhika | Update | ASS | XARM ASS Working | XARM ASS Fixed (hopefully)
The
winning approach was considering T and L |
|