| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15941
|
Thu Mar 18 18:06:36 2021 |
gautam | Update | Electronics | Modified Sat Amp and Coil Driver | I uploaded the annotated schematics (to
be more convenient than the noise analysis
notes linked from the DCC page) for the |
|
|
15942
|
Thu Mar 18 21:37:59 2021 |
rana | Update | LSC | PRMI investigations: what IS the matrix?? |
Locked PRMI several tmes after
Gautam setup. Easy w IFO CONFIG screen |
|
|
15943
|
Fri Mar 19 10:49:44 2021 |
Paco, Anchal | Update | SUS | Trying coil actuation balance | [Paco, Anchal]
We decided to try out the
coil actuation balancing after seeing some |
|
|
15944
|
Fri Mar 19 11:18:25 2021 |
gautam | Update | LSC | PRMI investigations: what IS the matrix?? | From Finesse simulation (and also analytic
calcs), the expected PRCL optical gain
is ~1 MW/m (there is a large uncertainty, |
|
|
15945
|
Fri Mar 19 15:26:19 2021 |
Aidan | Update | Computers | Activated MATLAB license on megatron | Activated MATLAB license on megatron |
|
|
15946
|
Fri Mar 19 15:31:56 2021 |
Aidan | Update | Computers | Activated MATLAB license on donatella | Activated MATLAB license on donatella |
|
|
15947
|
Fri Mar 19 18:14:56 2021 |
Jon | Update | CDS | Front-end testing | Summary
Today I finished setting
up the subnet for new FE testing. There
are clones of both fb1 and chiara running |
|
|
15948
|
Fri Mar 19 19:15:13 2021 |
Jon | Update | CDS | c1auxey assembly | Today I helped Yehonathan get started with
assembly of the c1auxey (slow controls) Acromag
chassis. This will replace the final remaining |
|
|
15949
|
Fri Mar 19 22:24:54 2021 |
gautam | Update | LSC | PRMI investigations: what IS the matrix?? | I did all these checks today.
|
|
|
15951
|
Mon Mar 22 11:57:21 2021 |
Paco, Anchal | Update | SUS | Trying coil actuation balance | [Paco, Anchal]
For MC coil balancing we
will use the ASC (i.e. WFS) error signals |
|
|
15952
|
Mon Mar 22 15:10:00 2021 |
rana | Update | SUS | Trying coil actuation balance | There's an integrator in the MC WFS
servos, so you should never be disabling
the ASC inputs in the suspensions. Disabling |
|
|
15953
|
Mon Mar 22 16:29:17 2021 |
gautam | Update | ASC | Some prep for AS WFS commissioning |
Added rough cts2mW calibration
filters to the quadrants, see |
|
|
15954
|
Mon Mar 22 19:07:50 2021 |
Paco, Anchal | Update | SUS | Trying coil actuation balance | We found that following protocol works
for changing the input matrices to new matrices:
Shut the PSL shutter C1:PSL-PSL_ShutterRqst. |
8x |
|
15955
|
Tue Mar 23 09:16:42 2021 |
Paco, Anchal | Update | Computers | Power cycled C1PSL; restored C1PSL | So actually, it was the C1PSL channels
that had died. We did the following to get
them back: |
|
|
15956
|
Wed Mar 24 00:51:19 2021 |
gautam | Update | LSC | Schnupp asymmetry | I used the Valera technique to measure
the Schnupp asymmetry to be |
|
|
15957
|
Wed Mar 24 09:23:49 2021 |
Paco | Update | SUS | MC3 new Input Matrix | [Paco]
Found IMC locked upon arrival
Loaded
newest MC3 Input Matrix coefficients using |
|
|
15958
|
Wed Mar 24 15:24:13 2021 |
gautam | Update | LSC | Notes on tests | For my note-taking:
Lock PRMI with ITMs as
the MICH actuator. Confirm that the MICH-->PRCL |
|
|
15959
|
Wed Mar 24 19:02:21 2021 |
Jon | Update | CDS | Front-end testing | This evening I prepared a new 2 TB 3.5"
disk to hold a copy of /opt/rtcds and /opt/rtapps
from chiara. This is the final piece of setup |
|
|
15960
|
Wed Mar 24 22:54:49 2021 |
gautam | Update | LSC | New day, new problems | I thought I'd get started on some of
the tests tonight. But I found that this
problem had resurfaced. I don't know |
|
|
15961
|
Thu Mar 25 11:46:31 2021 |
Paco, Anchal | Update | SUS | MC2 Coil Balancing updates | Proof-of-principle
We
excited PIT and YAW dofs using LOCKIN1 in
MC2 on Monday.
We |
|
|
15962
|
Thu Mar 25 12:11:53 2021 |
Yehonathan | Update | CDS | c1auxey assembly | I finished prewiring the new c1auxey Acromag
chassis (see attached pictures). I connected
all grounds to the DIN rail to save some |
|
|
15963
|
Thu Mar 25 14:16:33 2021 |
gautam | Update | CDS | c1auxey assembly | It might be a good idea to configure this
box for the new suspension config - modern
Satellite Amp, HV coil driver etc. It's |
|
|
15964
|
Thu Mar 25 14:58:16 2021 |
Yehonathan | Update | BHD | SOS SmCo magnets Inspection | Redoing magnet measurement of envelope
1:
|
|
|
15965
|
Thu Mar 25 15:31:24 2021 |
gautam | Update | IOO | WFS servos | The servos are almost certainly not optimal
- but we have the IFO sort of working, so
before we make any changes, let's make |
|
|
15967
|
Thu Mar 25 17:39:28 2021 |
gautam | Update | Computer Scripts / Programs | Spot position measurement scripts "modernized" | I want to measure the spot positions on
the IMC mirrors. We know that they can't
be too far off centerBasically I did the |
|
|
15968
|
Thu Mar 25 18:05:04 2021 |
gautam | Update | Electronics | Stuffed HV coil drivers received from Screaming Circuits | I think the only part missing for assembly
now are 4 2U chassis. The PA95s need to be
soldered on as well (they didn't arrive |
|
|
15969
|
Fri Mar 26 10:25:37 2021 |
Yehonathan | Update | BHD | SOS assembly | I measure some of the dowel pins we got
from Mcmaster with a caliper.
One small pin is 0.093" in |
|
|
15970
|
Fri Mar 26 11:54:37 2021 |
Paco, Anchal | Update | SUS | MC2 Coil Balancing updates | [Paco, Anchal]
Today
we spent the morning testing the scripts |
|
|
15972
|
Mon Mar 29 10:44:51 2021 |
Paco, Anchal | Update | SUS | MC2 Coil Balancing updates | We ran the coil balancing procedure 4 times
while iterating through the output matrix
optimization. |
|
|
15974
|
Mon Mar 29 17:11:54 2021 |
gautam | Update | SUS | MC2 Coil Balancing updates | For this technique to work, (i) the WFS
loops must be well tuned and (ii) the beam
must be well centered on MC2. I am reasonably |
|
|
15975
|
Mon Mar 29 17:34:52 2021 |
rana | Update | SUS | MC2 Coil Balancing updates | I think there's been some mis-communication.
There's no updated Hang procedure, but
there is the one that Anchal, Paco and I |
|
|
15976
|
Mon Mar 29 17:55:50 2021 |
Jon | Update | CDS | Front-end testing | Cloning of chiara:/home/cvs underway
I
returned today with a beefier USB-SATA adapter,
which has an integrated 12 V supply |
|
|
15977
|
Mon Mar 29 19:32:46 2021 |
gautam | Update | LSC | REFL55 whitening checkout | I repeated the usual whitening board characterization
test of:
driving a signal (using |
|
|
15978
|
Tue Mar 30 17:27:04 2021 |
Yehonathan | Update | CDS | c1auxey assembly | {Yehonathan, Jon}
We poked (looked
in situ with a flashlight, not disturbing |
|
|
15979
|
Tue Mar 30 18:21:34 2021 |
Jon | Update | CDS | Front-end testing | Progress today:
Outside Internet access for FE
test stand
This morning Jordan |
|
|
15980
|
Wed Mar 31 00:40:32 2021 |
Koji | Update | Electronics | Electronics Packaging for assembly work | I've worked on packing the components
for the following chassis
- 5 16bit AI chassis |
|
|
15982
|
Wed Mar 31 22:58:32 2021 |
Anchal, Paco | Update | SUS | MC2 Coil Balancing Test | A cross-coupling test has been set to trigger
at 05:00 am on April 1st, 2021. The script
is waiting on tmux session 'cB' on |
|
|
15983
|
Thu Apr 1 00:50:06 2021 |
gautam | Update | SUS | PRMdiag | I spent some time investigating the PRM
this evening, trying out some of the stuff
we discussed in the meeting. |
|
|
15984
|
Thu Apr 1 13:56:49 2021 |
Anchal, Paco | Update | SUS | MC2 Coil Balancing Test Results | The coil balancing attempt failed. The
off-diagonal values in the measured sensing
matrices either remained the same or increased. |
|
|
15985
|
Thu Apr 1 18:01:06 2021 |
Anchal, Paco | Update | SUS | MC2 Coil Balancing Test Results Success?? | After fixing a few things we felt were
wrong in our implementation of the algorithm,
we ran the coil balancing for 12 iterations |
|
|
15986
|
Thu Apr 1 18:16:28 2021 |
Koji | Update | Electronics | Electronics Packaging for assembly work | All small
components are packed in the boxes. They
are ready to ship.
|
|
|
15987
|
Thu Apr 1 18:48:45 2021 |
gautam | Update | SUS | MC2 Coil Balancing Test Results Success?? | In these results, can you also include
the new matrix and what the relative imbalances
were? |
|
|
15988
|
Thu Apr 1 21:13:54 2021 |
Anchal | Update | SUS | Matrix results, new measurement set to trigger |
New
Input matrix used for MC2 (C1:SUS-MC2_INMATRIX_ii_jj
|
|
|
15990
|
Fri Apr 2 01:26:41 2021 |
gautam | Update | Electronics | REFL55 chain checkout again, seems fine | [koji,
gautam]
Summary: |
|
|
15991
|
Fri Apr 2 14:51:20 2021 |
Anchal | Update | SUS | Bug found, need to redo the balancing | Last run gave similar results as the quick
run we did earlier. The code has been unable
to strike out couplings with POS. We found |
|
|
15993
|
Fri Apr 2 15:22:54 2021 |
gautam | Update | SUS | Matrix results, new measurement set to trigger | How should I try to understand why PIT
and YAW are so different?
|
|
|
15994
|
Sat Apr 3 00:42:40 2021 |
gautam | Update | LSC | PRFPMI locking with half input power | Summary:
I wanted to put my optomechanical
instability hypothesis to the test. So |
|
|
15995
|
Mon Apr 5 08:25:59 2021 |
Anchal, Paco | Update | General | Restore MC from early quakes | [Paco, Anchal]
Came in a little bit after 8 and
found the MC unlocked and struggling to lock |
|
|
15996
|
Mon Apr 5 22:26:01 2021 |
gautam | Update | LSC | PRMI 1f locking (no ETMs) recovered | Since it seems like the entire electronics
chain has no obvious failure, I decided to
compensate for the apparent increased optical |
|
|
15997
|
Tue Apr 6 07:19:11 2021 |
Jon | Update | CDS | New SimPlant cymac | Yesterday Chris and I completed setup of
the Supermicro machine that will serve as
a dedicated host for developing and testing |
|