| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15981
|
Wed Mar 31 03:56:37 2021 |
Koji | Summary | Electronics | A bunch of electronics received | We have received 9x 18bit DAC adapter boards
(D1000654) |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
15973
|
Mon Mar 29 17:07:17 2021 |
gautam | Summary | SUS | MC3 new Input Matrix not providing stable loop | I suppose you've tried doing the submatrix
approach, where SIDE is excluded for the
face DoFs? Does that give a better matrix? |
|
|
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. |
|
|
15971
|
Sun Mar 28 14:16:25 2021 |
Anchal | Summary | SUS | MC3 new Input Matrix not providing stable loop | Rana asked us to write out here the new
MC3 input matrix we have calculated along
with the old one. The new matrix is not working |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
15966
|
Thu Mar 25 16:02:15 2021 |
gautam | Summary | SUS | Repeated measurement of coil Rs & Ls for PRM/BS | Method
Since I am mainly concerned with
the actuator part of the OSEM, I chose to |
|
|
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 |
|
|
15964
|
Thu Mar 25 14:58:16 2021 |
Yehonathan | Update | BHD | SOS SmCo magnets Inspection | Redoing magnet measurement of envelope
1:
|
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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 |
|
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 |
|
|
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 |
|
|
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 |
|
|
15950
|
Sun Mar 21 19:31:29 2021 |
rana | Summary | Electronics | RTL-SDR for monitoring RF noise / interference | When we're debugging our RF system,
either due to weird demod phases, or low
SNR, or non-stationary noise in the PDH signals, |
|
|
15949
|
Fri Mar 19 22:24:54 2021 |
gautam | Update | LSC | PRMI investigations: what IS the matrix?? | I did all these checks today.
|
|
|
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 |
|
|
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 |
|
|
15946
|
Fri Mar 19 15:31:56 2021 |
Aidan | Update | Computers | Activated MATLAB license on donatella | Activated MATLAB license on donatella |
|
|
15945
|
Fri Mar 19 15:26:19 2021 |
Aidan | Update | Computers | Activated MATLAB license on megatron | Activated MATLAB license on megatron |
|
|
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, |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
15940
|
Thu Mar 18 13:12:39 2021 |
gautam | Update | Computer Scripts / Programs | Omnigraffle vs draw.io | What is the advantage of Omnigraffle c.f.
draw.io?
The latter also has a desktop app, and for |
|
|
15939
|
Thu Mar 18 12:46:53 2021 |
rana | Update | SUS | Testing of new input matrices with new data | Good Enough! Let's move on with output
matrix tuning. I will talk to you guys about
it privately so that the whole doesn't |
|
|
15938
|
Thu Mar 18 12:35:29 2021 |
rana | Update | safety | Door to outside from control room was unlocked | I think this is probably due to the safety
tour yesterday. I beleive Jordan showed them
around the office area and C&B. Not sure |
|
|
15937
|
Thu Mar 18 09:18:49 2021 |
Paco, Anchal | Update | SUS | Testing of new input matrices with new data | [Paco, Anchal]
Since the new generated matrices
were created for the measurement made last |
|
|
15936
|
Thu Mar 18 07:02:27 2021 |
Koji | Update | LSC | REFL11 demod retrofitting | Attachment 1: Transfer Functions
The original circuit had a gain
of ~20 and the phase delay of ~1deg at 10kHz, |
|
|
15935
|
Thu Mar 18 01:12:31 2021 |
gautam | Update | LSC | PRFPMi |
Integrated >1
hour at RF only control, high circulating
powers tonight.
All |
|
|
15934
|
Wed Mar 17 16:30:46 2021 |
Anchal | Update | SUS | Normalized Input Matrices plotted better than SURF students | Here, I present the same input matrices
now normalized row by row to have same norm
as current matrices rows. These now I plotted |
|
|
15933
|
Wed Mar 17 15:04:20 2021 |
gautam | Update | Electronics | Ribbon cable for chassis | I had asked Chub to order 100ft ea of 9,
15 and 25 conductor ribbon cable. These arrived
today and are stored in the VEA alongside |
|
|
15932
|
Wed Mar 17 15:02:06 2021 |
gautam | Update | safety | Door to outside from control room was unlocked | I came into the lab a few mins ago and
found the back door |
|