| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16557
|
Fri Jan 7 18:24:25 2022 |
Koji | Update | BHD | SOS assembly -- SR2 | Vacseal in the freezer. It could have been
expired sooooo many years ago, We need some
cure testing. |
|
|
16558
|
Fri Jan 7 18:28:13 2022 |
Koji | Update | BHD | PR2 Sat Amp has a bad channel | Leave the unit to me. I can look it at
on Mon. For a while, you can take a replacement
unit from the electronics stack. |
|
|
16560
|
Mon Jan 10 13:35:52 2022 |
Anchal | Update | BHD | PR2 Sat Amp has a bad channel | The unit was tested before by Tege. The
test included testing the testpoint voltages
only. He summarized his work in |
|
|
16561
|
Mon Jan 10 14:00:44 2022 |
not Koji | Update | BHD | SOS assembly -- SR2 | Yes,
For the thin optics adapter design,
we want Peek 1/4-20 screw (part # 98885A131) |
|
|
16563
|
Mon Jan 10 15:45:55 2022 |
Paco | Update | Electronics | ITMY feedthroughs and in-vac cables installed - part I | The ITMY 10" flange with 10 DSUB-25
feedthroughs has been installed with the
cables connected at the in-vac side. |
|
|
16564
|
Mon Jan 10 15:59:46 2022 |
Koji | Update | BHD | PR2 Sat Amp has a bad channel | The issue was present in the cable between
the small adapter board and the rear panel.
The cable and the Dsub 25 connectors were |
6x |
|
16565
|
Mon Jan 10 17:04:47 2022 |
Anchal | Update | BHD | AS1 Sat Amp CH2 had offset | We found that there was a small offset
(~300 mV) at TP6 and TP8, in PD2 circuit
(CH2 of the board). I replaced U3 AD822ARZ |
|
|
16566
|
Mon Jan 10 18:20:45 2022 |
Anchal | Update | BHD | Tested 2" PR2 candidates transmission | I tested 2 more optics found by Paco and
Yehonathan in QIL.
|
|
|
16568
|
Tue Jan 11 09:53:14 2022 |
not Koji | Update | BHD | SOS assembly -- Peek screws and nuts | I handed the Peek parts we got from McMaster
to Jordan for C&B. |
|
|
16569
|
Tue Jan 11 10:23:18 2022 |
Paco | Update | Electronics | ITMY feedthroughs and in-vac cables installed - part II | [Paco, Chub]
The ITMY 10" flange with 4
DSUB-25 feedthroughs has been installed with |
|
|
16570
|
Tue Jan 11 10:46:07 2022 |
Tega | Update | CDS | SUS screen debugging | Seen. Thanks.
Red Arrow: The channel was labeled
incorrectly as INMON instead of OUTPUT |
|
|
16571
|
Tue Jan 11 10:58:58 2022 |
Tega | Update | SUS | Temporary watchdog | Started working on this. First created
a git repo for tracking https://git.ligo.org/40m/susaux.git
I have looked through the folder |
|
|
16573
|
Tue Jan 11 13:43:14 2022 |
Koji | Update | SUS | Temporary watchdog | I don't remember the syntax of the
db file, but here this calc channel computes
A&B. And A&B corresponds to INPA |
|
|
16574
|
Tue Jan 11 14:21:53 2022 |
Paco | Update | Electronics | BS feedthroughs and in-vac cables installed | [Paco, Yehonathan, Chub]
The BS chamber 10" flange
with 4 DSUB-25 feedthroughs has been installed |
|
|
16575
|
Tue Jan 11 15:21:16 2022 |
Anchal | Update | BHD | PR2 transmission calculation | I did this simple calculation where I assumed
1W power from laser and 10% transmission
past IMC. We would go ahead with V6-704/V6-705 |
|
|
16582
|
Thu Jan 13 16:08:00 2022 |
Yehonathan | Update | BHD | gluing magnets after AS1/4 misfortune | {Yehonathan, Anchal, Paco}
In the cleanroom, we removed AS1
and AS4 from their SOS towers. We removed |
|
|
16583
|
Thu Jan 13 17:10:55 2022 |
Anchal | Update | BHD | PR2 transmission calculation | I corrected the calculation by adding losses
by the arm cavity ends times the arm cavity
finesse and also taking into account the |
|
|
16584
|
Fri Jan 14 03:07:04 2022 |
Koji | Update | BHD | PR2 transmission calculation | I opened the notebook but I was not sure
where you have the loss per bounce for the
arm cavity. |
|
|
16585
|
Fri Jan 14 11:00:29 2022 |
Anchal | Update | BHD | PR2 transmission calculation | Yeah, I counted the loss from arm cavities
as the transmission from ETMs on each bounce.
I assumed Michelson to be perfectly aligned |
|
|
16586
|
Fri Jan 14 12:01:21 2022 |
Anchal | Update | Electronics | BS & ITMY feedthroughs labeled and connected to Sat Amps | I labeled all the newly installed flanges
and connected the in-air cables (40m/16530)
to appropriate ports. These cables are connected |
|
|
16587
|
Fri Jan 14 13:46:25 2022 |
Anchal | Update | BHD | PR2 transmission calculation updated | I updated the arm cavity roundtrip losses
due to scattering. Yehonathan told me that
arm cavity looses 50ppm every roundtrip other |
|
|
16588
|
Fri Jan 14 14:04:51 2022 |
Paco | Update | Electronics | RFSoC 2x2 board arrived | The Xilinx RFSoC 2x2 board arrived right
before the winter break, so this is kind
of an overdue elog. I unboxed it, it came |
|
|
16589
|
Fri Jan 14 17:33:10 2022 |
Yehonathan | Update | BHD | AS4 resurrection | {Yehonathan, Anchal}
Came this morning, the gluing of
the magnets was 100% successful. Side blocks, |
|
|
16597
|
Wed Jan 19 14:41:23 2022 |
Koji | Update | BHD | Suspension Status | Is this the correct status? Please
directly update this entry.
|
|
|
16598
|
Wed Jan 19 16:22:48 2022 |
Anchal | Update | BHD | PR2 transmission calculation updated | I have further updated my calculation.
Please find the results in the attached pdf.
Following is the description of |
|
|
16599
|
Wed Jan 19 18:15:34 2022 |
Yehonathan | Update | BHD | AS1 resurrection | Today I suspended AS1. Anchal helped me
with the initial hanging of the optics. Attachments
1,2 show the roll balance and side magnet |
|
|
16600
|
Wed Jan 19 21:39:22 2022 |
Tega | Update | SUS | Temporary watchdog | After some work on the reference database
file, we now have a template for temporary
watchdog implementation for LO1 located here |
|
|
16601
|
Thu Jan 20 00:26:50 2022 |
Koji | Update | SUS | Temporary watchdog | As the new db is made for c1susaux, 1)
it needs to be configured to be read by c1susaux
2) it requires restarting c1susaux 3) it |
|
|
16602
|
Thu Jan 20 01:48:02 2022 |
Koji | Update | BHD | PR2 transmission calculation updated | IMC is not such lossy. IMC output is supposed
to be ~1W.
The critical coupling condition |
|
|
16603
|
Thu Jan 20 12:10:51 2022 |
Yehonathan | Update | BHD | AS1 resurrection | I was wondering whether I should take AS1
down to redo the wire clamping on the side
blocks. I decided to take the OpLev spectrum |
|
|
16604
|
Thu Jan 20 16:42:55 2022 |
Paco | Update | BHD | AS4 OSEMs installation - part 2 | [Paco]
Turns out, the shifting was likely
due to the table level. Because I didn't |
|
|
16606
|
Thu Jan 20 17:21:21 2022 |
Tega | Update | SUS | Temporary watchdog | Temp software watchdog now operational
for LO1 and the remaining optics!
Koji helped me understand how to |
|
|
16607
|
Thu Jan 20 17:34:07 2022 |
Koji | Update | BHD | V6-704/705 Mirror now @Downs | The PR2 candidate V6-704/705 mirrors (Qty2)
are now @Downs. Camille picked them up for
the measurements. |
|
|
16608
|
Thu Jan 20 18:16:29 2022 |
Anchal | Update | BHD | AS4 set to trigger free swing test | AS4 is set to go through a free swinging
test at 10 pm tonight. We have used this
script (Git/40m/scripts/SUS/InMatCalc/ |
|
|
16611
|
Fri Jan 21 12:46:31 2022 |
Tega | Update | CDS | SUS screen debugging | All done (almost)! I still have not sorted
the issue of pitch and yaw gains growing
together when modified using ramping time. |
|
|
16612
|
Fri Jan 21 14:51:00 2022 |
Koji | Update | BHD | V6-704/705 Mirror now @Downs | Camille@Downs measured the surface of these
M1 and M2 using Zygo. |
|
|
16613
|
Fri Jan 21 16:40:10 2022 |
Anchal | Update | BHD | AS4 Input Matrix Diagonalization performed. | The free swinging test was successful.
I ran the input matrix diagonalization code
(/opt/rtcds/caltech/c1/Git/40m/scripts/SUS/InMAtCalc/sus_diagonalization.py) |
|
|
16616
|
Mon Jan 24 17:12:27 2022 |
rana | Update | BHD | AS4 Input Matrix Diagonalization performed. | I think our
suspension input matrix diagonalization is
not so robust usually because |
|
|
16617
|
Mon Jan 24 17:58:21 2022 |
Yehonathan | Update | BHD | PR2 Suspension | I picked up the PR2 mirrors (labeled M1,
M2) from Anchel's table and took them
to the cleanroom. By inspection, I spotted |
|
|
16619
|
Mon Jan 24 20:48:48 2022 |
Anchal | Update | BHD | AS4 Input Matrix Diagonalization performed. | I agree. That's an interesting idea.
But does that mean that there is an always
working inverse matrix solution or that any |
|
|
16624
|
Tue Jan 25 18:37:12 2022 |
TYehonathan | Update | BHD | PR2 Suspension | PR2's side magnet height was adjusted
and its roll was balanced (attachment 1,2).
I verified that the OpLev beam is still aligned. |
|
|
16634
|
Mon Jan 31 10:39:19 2022 |
Jordan | Update | VAC | TP1 and Manual Gate Valve Removal | Jordan, Chub
Today, Chub and I removed TP1 and
the failed manual gate valve off of the pumping |
|
|
16636
|
Tue Feb 1 20:16:09 2022 |
Tega | Update | BHD | PR2 candidate mirror analysis | git repo: git@git.ligo.org:tega-edo/charmirrormap.git
The analysis code takes in a set
of raw images, 10 in our case, for |
|
|
16643
|
Thu Feb 3 10:25:59 2022 |
Jordan | Update | VAC | TP1 and Manual Gate Valve Install | Jordan, Chub
Chub and I installed the new manual
gate valve (Nor-Cal GVM-6002-CF-K79) and |
|
|
16644
|
Thu Feb 3 14:47:12 2022 |
Chub | Update | Electronics | new UPS in place | Received the new 1100VA APC UPS today and
placed it at the bottom of the valve rack.
I'd connected the battery and plugged |
|
|
16646
|
Fri Feb 4 10:04:47 2022 |
Chub | Update | General | dish soap and clean scrub sponges! | Bought dish soap and scrub sponges today
and placed them under the sink with the other
dish supplies. |
|
|
16648
|
Mon Feb 7 09:00:26 2022 |
Paco | Update | General | Scheduled power outage recovery | [Paco]
Started recovering from scheduled
(Feb 05) power outage. Basically, time-reversing |
|
|
16649
|
Mon Feb 7 15:32:48 2022 |
Yehonathan | Update | General | Y End laser controller | I went to the Y end. The AUX laser was
on Standby. I pushed the Standby button.
The laser turned on and there was some green |
|
|
16650
|
Mon Feb 7 16:14:37 2022 |
Tega | Update | Computers | realtime system reboot problem | I was looking into plotting temperature
sensor data trend and why we currently do
not have frame data written to file (on /frames) |
|
|
16651
|
Mon Feb 7 16:53:02 2022 |
Koji | Update | General | Scheduled power outage recovery | I went to the X end and found it was warm.
Turned out that not all the A/Cs were on.
They were turned on now. |
|