| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16591
|
Tue Jan 18 14:26:09 2022 |
Paco | Summary | BHD | Part IX of BHR upgrade - Placed remaining filters SR2, PR3, PR2 | [Anchal, Paco]
Added input filters, input matrix,
damping filters, output matrix, coil filters, |
|
|
16592
|
Tue Jan 18 15:19:49 2022 |
Paco | Summary | BHD | Part IV of BHR upgrade - Replaced old SR3 with SOS SR2. OSEM tuning attemtped. | [Tega, Anchal, Paco]
We started working on SR2 installation.
Preliminary work involved |
|
|
16593
|
Tue Jan 18 18:16:28 2022 |
Anchal | Summary | BHD | Part IV of BHR upgrade - SR2 Sat Amp Box inspection | I tested the monitor ports on the SR2
Sat Amp Box but found that all LED Mon
and PD Mon are giving expected values. I |
|
|
16594
|
Tue Jan 18 18:19:22 2022 |
Koji | Summary | BHD | AS4 placed in ITMY Chamber, OSEMs connected | AS4 satellite amplifier D1002818
/ D080276 troubleshoot
I dug into the circuit to see what/where |
|
|
16595
|
Wed Jan 19 12:50:10 2022 |
Anchal | Summary | BHD | Part IV of BHR upgrade - SR2 OSEM tuning progress. | It was indeed the issue of the top OSEM
plate not being in the right place horizontally.
But the issue was more non-trivial. I believe |
|
|
16596
|
Wed Jan 19 12:56:52 2022 |
Paco | Summary | BHD | AS4 OSEMs installation | [Paco, Tega, Anchal]
Today, we started work on AS4 SOS
by checking the OSEM and cable. Swapping |
|
|
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 |
|
|
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 |
|
|
16605
|
Thu Jan 20 17:03:36 2022 |
Anchal | Summary | BHD | Part IV of BHR upgrade - SR2 OSEM tuned. | The main issue with SR2 OSEMs, now that
I think of it, was that the BS table was
very inclined due to the multiple things |
|
|
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/ |
|
|
16609
|
Thu Jan 20 18:41:55 2022 |
Anchal | Summary | BHD | SR2 set to trigger free swing test | SR2 is set to go through a free swinging
test at 3 am tonight. We have used this script
(Git/40m/scripts/SUS/InMatCalc/freeSwing.py) |
|
|
16610
|
Fri Jan 21 11:24:42 2022 |
Anchal | Summary | BHD | SR2 Input Matrix Diagonalization performed. | The free swinging test
was successful. I ran the input matrix diagonalization
code ( |
|
|
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 |
|
|
16618
|
Mon Jan 24 18:53:09 2022 |
Anchal | Summary | BHD | Part VIII of BHR upgrade - LO2 placed and OSEMs tuned | I placed LO2 in its planned position in
BS chamber, inserted the OSEMs, and tuned
their position to halfway brightness. At |
|
|
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 |
|
|
16620
|
Mon Jan 24 21:18:40 2022 |
Paco | Summary | BHD | Part IX of BHR upgrade - AS1 placed and OSEM tuned | [Paco]
AS1 was installed in the ITMY chamber
today. For this I moved AS4 to its nominal |
|
|
16621
|
Tue Jan 25 10:55:02 2022 |
Anchal | Summary | BHD | Part VIII of BHR upgrade - LO2 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) |
|
|
16622
|
Tue Jan 25 11:02:54 2022 |
Anchal | Summary | BHD | Part IX of BHR upgrade - AS1 free swing test failed | For some reasonf the free swing test showed
only one resonance peak (see attachment 1).
This probably happened because one of the |
|
|
16623
|
Tue Jan 25 16:42:03 2022 |
Anchal | Summary | BHD | Reduced filter gains in all damped new SOS | I noticed that our current suspension damping
loops for the new SOS were railing the DAC
outputs. The reason being that cts2um module |
|
|
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. |
|
|
16625
|
Thu Jan 27 08:27:34 2022 |
Paco | Summary | BHD | Part IX of BHR upgrade - AS1 inspection and correction | [Paco]
This morning, I went into ITMY
chamber to inspect AS1 after the free swinging |
|
|
16627
|
Thu Jan 27 17:57:35 2022 |
Anchal | Summary | BHD | Part III of BHR upgrade - Replaced small suspended PR3 with new SOS PR3 and OSEM tuning | [Anchal, Paco]
We removed the old PR3 housed in
a tip-tilt style suspension and put it on |
|
|
16628
|
Thu Jan 27 18:03:36 2022 |
Paco | Summary | BHD | Part III of BHR upgrade - Install PR2, balance, and attempt OSEM tuning | [Paco, Anchal, Tega]
After installing the short OSEMs
into PR2, we moved it into ITMX Chamber. |
|
|
16629
|
Thu Jan 27 20:46:38 2022 |
Koji | Summary | BHD | Part III of BHR upgrade - Install PR2, balance, and attempt OSEM tuning |
Started debugging D1002818
/ S2100737
(8:30PM)
Confirmed the issue of |
|
|
16630
|
Fri Jan 28 10:37:59 2022 |
Paco | Summary | BHD | Part III of BHR upgrade - PR2 OSEM finalized, reinsall LO1 OSEMs | [Paco]
Thanks to Koji's hotfix on
the PR2 SatAmp box last evening, this morning |
|
|
16631
|
Fri Jan 28 11:30:52 2022 |
Koji | Summary | BHD | Part III of BHR upgrade - PR2 OSEM finalized, reinsall LO1 OSEMs | All
green! Great work, Team! |
|
|
16632
|
Fri Jan 28 16:35:18 2022 |
Anchal | Summary | BHD | AS1, PR2 and PR3 set to trigger free swing test | AS1, PR2 and PR3 are set to o go through
a free swinging test at 3 am. We have used
this script |
|
|
16635
|
Tue Feb 1 15:33:28 2022 |
Koji | Summary | BHD | Optomechanics configuration for the in-vacuum aux small optics | I've summarized the optomechanics configuration
for the in-vacuum aux small optics
It's not obvious here but the |
|
|
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 |
|
|
16637
|
Wed Feb 2 16:22:00 2022 |
Anchal | Summary | BHD | Part III of BHR upgrade - PR2 inpute matrix diagonalized | The
free swinging test was successful. I
ran the input matrix diagonalization code |
|
|
16638
|
Wed Feb 2 16:27:57 2022 |
Anchal | Summary | BHD | Part III of BHR upgrade - PR3 inpute matrix diagonalized | The
free swinging test was successful. I
ran the input matrix diagonalization code |
|
|
16639
|
Wed Feb 2 16:32:02 2022 |
Anchal | Summary | BHD | Part IX of BHR upgrade - AS1 free swing test still not good | We still did not get a good AS1 free swinging
spectrum. It seems the Side OSEM is reporting
coupling to too many DOFs and some extra |
|
|
16640
|
Wed Feb 2 18:55:58 2022 |
Koji | Summary | BHD | Optomechanics configuration for the in-vacuum aux small optics | Here is more detail of the POP_SM4
mount assembly.
It's a combination of BA2V |
|
|
16641
|
Wed Feb 2 21:16:23 2022 |
Koji | Summary | BHD | Optomechanics configuration for the in-vacuum aux small optics | Asked Jordan to clean 2x 1.5" posts
(0.5 dia) and a washer with 1" dia.
|
|
|
16678
|
Thu Feb 24 18:05:58 2022 |
Yehonathan | Update | BHD | Re-susspension of AS1 | {Yehonathan, Anchal, Paco}
Yesterday, Anchal and Paco removed
AS1 from the vacuum chamber and moved it |
|
|
16694
|
Wed Mar 2 14:02:43 2022 |
Yehonathan | Update | BHD | Re-susspension of AS1 | Yesterday, I rebuilt the OpLev setup in
the cleanroom in order to suspend AS1. It
took me a while to find all the necessary |
|
|
16698
|
Thu Mar 3 17:09:46 2022 |
Paco | Update | BHD | Re-susspension of AS1 | [Anchal, Paco]
Wire clamp spare was installed,
furthermore AS1 was reinstalled on adapter, |
|
|
16710
|
Mon Mar 7 16:56:08 2022 |
Yehonathan | Update | BHD | Re-susspension of AS1 | {Paco, Yehonathan}
We tried to roughly balance the
adapter with two counterweights at the front, |
|
|
16711
|
Mon Mar 7 18:53:16 2022 |
Koji | Update | BHD | Re-susspension of AS1 | Not sure if that small difference can cause
the alignment inability. Particularly, the
removed metal was just below the wire. This |
|
|
16714
|
Tue Mar 8 12:24:13 2022 |
Yehonathan | Update | BHD | Re-susspension of AS1 | The gluing seemed to be successful. I assembled
the side block with the magnet on the adapter.
Paco helped me hang the adapter on the SOS |
|
|
16715
|
Tue Mar 8 19:29:36 2022 |
Paco | Update | BHD | Re-balance of AS1 | [Paco]
Installed AS1 in vacuum, near the
center of the table, and installed the OSEMs. |
|
|
16716
|
Wed Mar 9 09:35:26 2022 |
Paco | Update | BHD | Re-balance of AS1 | [Paco]
AS1 is installed, OSEMs balanced,
and the optic damped successfully. We should |
|