| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16552
|
Thu Jan 6 21:04:41 2022 |
Anchal | Summary | BHD | Part VIII of BHR upgrade - LO1 OSEMs inserted | [Anchal, Koji] Part of elog:
40m/16549.
The magnets on the mirror face |
|
|
16554
|
Fri Jan 7 16:17:42 2022 |
Anchal | Summary | BHD | Part IX of BHR upgrade - Placed AS1 and AS4 filters | [paco]
Added input filters, input matrix,
damping filters, output matrix, coil filters, |
|
|
16555
|
Fri Jan 7 17:54:13 2022 |
Anchal | Update | BHD | PR2 Sat Amp has a bad channel | [Anchal, Paco]
Yesterday we noticed that one of
the ADC channels was overflowing. I checked |
|
|
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 |
|
|
16562
|
Mon Jan 10 14:52:51 2022 |
Anchal | Summary | BHD | LO1 OSEMs roughly calibrated and noise measured | I used the open light level output of 908
for ITMX side OSEM from 40m/16549
to roughly calibrate cts2um filter module |
|
|
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.
|
|
|
16567
|
Mon Jan 10 18:36:41 2022 |
Anchal | Summary | BHD | LO1 free swinging test set to trigger | LO1 is set to go through a free swinging
test at 1 am tonight. We have used this script
(scripts/SUS/InMatCalc/freeSwing.py) reliably |
|
|
16572
|
Tue Jan 11 12:19:12 2022 |
Anchal | Summary | BHD | LO1 Input Matrix Diagonalization performed. | The frree swinging test was successful.
I ran the input matrix diagonalization code
(scripts/SUS/InMAtCalc/sus_diagonalization.py) |
|
|
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 |
|
|
16577
|
Tue Jan 11 18:18:29 2022 |
Anchal | Summary | BHD | Attempted OSEM installation on AS1 | [Anchal, Paco, Yehonathan]
Connected in-cir cable to new flange
on ITMY Chamber |
|
|
16578
|
Tue Jan 11 18:40:25 2022 |
Anchal | Summary | BHD | AS1 Sat Amp has a PCB issue | AS1
Sat Amp (S2100741) has a critical PCB
issue on it's Ch5-8 board S2100548. This |
|
|
16579
|
Thu Jan 13 09:48:41 2022 |
Anchal | Summary | BHD | AS1 Sat Amp fixed | I fixed the issue in AS1
Sat Amp (S2100741) by using a razor blade.
I cut the short between the two places, cleaned |
|
|
16580
|
Thu Jan 13 12:24:08 2022 |
Anchal | Summary | BHD | AS1 SD and LR magnets broke | [Anchal (vacuum work), Paco (outside)]
After the AS1 Sat Amp fix (40m/16579),
we today were able to tune all OSEMs to the |
|
|
16581
|
Thu Jan 13 12:29:27 2022 |
Anchal | Summary | BHD | AS4 LR magnet broke | After the debacle with AS1 (40m/16580),
we decided the put the PEEK earthquake stop
by first removing the lower OSEM plate and |
|
|
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 |
|
|
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 |
|
|
16590
|
Fri Jan 14 18:12:47 2022 |
Anchal | Summary | BHD | AS4 placed in ITMY Chamber, OSEMs connected | AS4 was succesfully suspended and trasported
to ITMY chamber (40m/16589).
We placed it near the door to make it easy |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 ( |
|
|
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) |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
16647
|
Fri Feb 4 10:21:39 2022 |
Anchal | Summary | General | Complete lab shutdown | Please edit this same
entry throughout the day for the shutdown |
|
|
16652
|
Wed Feb 9 11:56:24 2022 |
Anchal | Update | General | Bringing back CDS | [Anchal, Paco]
Bringing back CDS took a lot of
work yesterday. I'm gonna try to summarize |
|
|
16657
|
Thu Feb 10 15:41:00 2022 |
Anchal | Update | General | Scheduled power outage recovery - Locking mode cleaner(s) | I found out that the ESP300 service needs
to be run in root mode for it to be able
to connect to the USB port of HWP motor controller. |
|
|
16658
|
Thu Feb 10 17:57:48 2022 |
Anchal | Update | General | Scheduled power outage recovery - Locking mode cleaner(s) | Something is wrong with the Video MUX.
The system did not turn back on with full
functionality. Even though we see the screens |
|
|
16664
|
Fri Feb 11 10:56:38 2022 |
Anchal | Update | CDS | [Solved] Huge random numbers flowing into ETMX/ETMY ASC PIT/YAW | Yeah, this is a known issue actually. We
go to ASC screen and manually swich off all
the outputs after every reboot. We haven't |
|
|
16665
|
Fri Feb 11 11:17:00 2022 |
Anchal | Update | General | Scheduled power outage recovery | I found that two computers are not powering
up in the control room, Ottavia and Allegra.
Allegra was important for us as it had the |
|
|
16667
|
Fri Feb 11 16:09:11 2022 |
Anchal | Update | General | Scheduled power outage recovery - Input power increased | We increased the input power to IMC by
replacing the 98% transmission BS by a 10%
transmission BS on the detection table (reverse |
|
|
16668
|
Fri Feb 11 17:07:19 2022 |
Anchal | Update | CDS | [Solved] Huge random numbers flowing into ETMX/ETMY ASC PIT/YAW | The autoBurt file for FE already has the
C1:ASC-ETMX_PIT_SW2 (and other channels for
ETMY, ITMX, ITMY, BS and for YAW) present, |
|
|
16674
|
Wed Feb 16 15:19:41 2022 |
Anchal | Update | General | Reconfigured MC reflection path for low power | I reconfigured the MC reflection path for
low power. This meant the following changes:
Replaced the 10% reflection |
|
|
16676
|
Wed Feb 23 15:08:57 2022 |
Anchal | Update | General | Removed extra beamsplitter in MC WFS path | As discussed in the meeting, I removed
the extra beam splitter that dumps most of
the beam going towards WFS photodiodes. |
|
|
16677
|
Thu Feb 24 14:32:57 2022 |
Anchal | Update | General | MC RFPD DCMON channel got stuck to 0 | I found a peculiar issue today. The C1:IOO-MC_RFPD_DCMON
remains constantly 0. I wonder if the RFPF
output is being read properly. I opened the |
|
|
16679
|
Thu Feb 24 19:26:32 2022 |
Anchal | Update | General | IMC Locking | I think I have aligned the cavity, including
MC1 such that we are seeing flashing of fundamental
mode and significant transmission sum value |
|