| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16043
|
Fri Apr 16 15:47:58 2021 |
rana | Update | SUS | Tested proposed filters for POS colum in MC2 output matrix | Looks mostly right, but you
used the OSEM sensors as readbacks. |
|
|
16042
|
Fri Apr 16 11:36:36 2021 |
Anchal, Paco | Update | SUS | Tested proposed filters for POS colum in MC2 output matrix | We tried two sets of filters on the output
matrix POS column in MC2. Both versions failed.
Following are some details. |
|
|
16041
|
Fri Apr 16 11:31:00 2021 |
rana | Update | elog | elog stuck ~10 AM today | found it unresponsive. Restarted fine using
procedure documented in wiki |
|
|
16040
|
Fri Apr 16 10:58:16 2021 |
Yehonathan | Update | General | Glue Freezer completely frozen | {Paco, Anchal, Yehonathan}
We emptied the fridge and moved
the amplifier equipment on top of the amplifier |
|
|
16039
|
Fri Apr 16 00:21:52 2021 |
Koji | Update | General | Glue Freezer completely frozen | I was looking at the laser head/amp and
somehow decided to open the glue freezer.
And it was stuck. I've managed to open |
|
|
16038
|
Thu Apr 15 18:33:39 2021 |
Koji | Update | CDS | More 16bit ADC adapter boards | We received 10x 16bit ADC adapter boards
from Todd. S2100687~S2100696
The number of soldered resistors |
|
|
16037
|
Thu Apr 15 17:24:08 2021 |
Jon | Update | CDS | Updated c1auxey wiring plan | I've updated the c1auxey wiring
plan for compatibility with the new suspension
electronics. Specifically it is based on |
|
|
16036
|
Thu Apr 15 15:54:46 2021 |
gautam | Update | IOO | Waveplate commissioning - hardware installed | [jordan,
gautam] |
|
|
16035
|
Thu Apr 15 11:41:43 2021 |
Anchal | Update | SUS | Proposed filters for output matrix aka F2A aka F2P | Here' s aquick update before we leave
for lunch. We have managed to calculate some
filter that would go on the POS column in |
|
|
16034
|
Thu Apr 15 09:46:24 2021 |
Yehonathan | Update | PSL | Laser amplifier | Some more relevant documents provided by
Matt:
Phase |
|
|
16033
|
Wed Apr 14 23:55:34 2021 |
gautam | Update | Electronics | HV Coil driver assembly | I've occcupied the southernmost electronics
bench for assembling the 4 production version
HV coil driver chassis. I estimate it will |
|
|
16032
|
Wed Apr 14 19:48:18 2021 |
gautam | Update | PSL | Laser amplifier | A couple of years ago, I got some info
about the amplifier setup at the sites from
Terra - sharing here in case there is some |
|
|
16031
|
Wed Apr 14 17:53:38 2021 |
Anchal | Update | SUS | Plan for calculating filter banks for output matrix aka F2A aka F2P | Plan of action
Get
the transfer functions of the suspension
plant from actuated DOF to sensed DOF. We'll |
|
|
16030
|
Wed Apr 14 16:46:24 2021 |
Anchal | Update | General | IFO State | That makes sense. I assumed that IFO-STATE
is configured as you have proposed it to
be configured. This could be implemented |
|
|
16029
|
Wed Apr 14 15:30:29 2021 |
rana | Update | General | Sorry, it was me | Maybe tighten the tensioner on the door
closer so that it closes by itself even in
the low velocity case. Or maybe just use |
|
|
16028
|
Wed Apr 14 14:52:42 2021 |
gautam | Update | General | IFO State | The C1:IFO-STATE
variable is actually a bunch (16 to be precise) |
|
|
16027
|
Wed Apr 14 13:16:20 2021 |
Anchal | Configuration | Computers | 40m Control Room Changes |
I have confirmed that the old two
monitors' backlighting is not working.
One can see the impression of the display |
|
|
16026
|
Wed Apr 14 13:12:13 2021 |
Anchal | Update | General | Sorry, it was me | Sorry about that. It must be me. I'll
make sure it doesn't happen again. I
was careless to not check back, no further |
|
|
16025
|
Wed Apr 14 12:27:10 2021 |
gautam | Update | General | Lab left open again | Once again, I found
the door to the outside in the control room |
|
|
16024
|
Tue Apr 13 20:45:16 2021 |
Yehonathan | Update | PSL | Laser amplifier | {Yehonathan, Rana}
We unpacked the content of the
amplifier crate in front of the water fountain |
|
|
16023
|
Tue Apr 13 19:24:45 2021 |
gautam | Update | PSL | High power operations | We (rana, yehonathan and i) briefly talked
about having high power going into the IFO.
I worked on some calcs a couple of years |
|
|
16022
|
Tue Apr 13 17:47:07 2021 |
gautam | Update | IOO | Waveplate commissioning - software prepared | I spent some time today setting up a workable
user interface to control the waveplate.
Created some EPICS database |
|
|
16021
|
Tue Apr 13 16:24:38 2021 |
Ian MacMillan | Update | CDS | 40m LSC simPlant model | Added Matlab to the Docker machine. This
should help immensely with workflow as well
as keeping installed libraries consistent. |
|
|
16020
|
Tue Apr 13 09:51:22 2021 |
rana | Update | SUS | What's F2A?? | Force to Angle. It just means the filters
that are in the POS OUTPUT matrix. I think
in the past sometimes they are called F2P |
|
|
16019
|
Mon Apr 12 18:34:26 2021 |
Yehonathan | Summary | PSL | PMC unlocked at 2pm on Sunday; ~ Restored | PMC lost lock again at around 16:00 April
12. I was able to lock it again but the transmission
is only 0.6 now and REFL is 0.14. |
|
|
16018
|
Mon Apr 12 17:30:11 2021 |
Yehonathan | Update | BHD | SOS assembly | Today, I screwed the plungers on the sensor
plates and installed them on the Towers.
I also installed the wire clamps on the suspension |
|
|
16017
|
Mon Apr 12 10:07:35 2021 |
Anchal | Update | SUS | What's F2A?? | I'm not sure I understand what F2A
is? I couldn't find a description of
this filter anywhere and don't remember |
|
|
16016
|
Mon Apr 12 08:32:54 2021 |
Anchal, Paco | Summary | PSL | PMC unlocked at 2pm on Sunday; ~ Restored | PMC lost lock between 21:00 and 22:00 UTC
on April 11th as seen in the summary pages:
https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20210411/psl/#gallery-4 |
|
|
16015
|
Sat Apr 10 11:56:14 2021 |
Jon | Update | CDS | 40m LSC simPlant model | Summary
Yesterday I resurrected
the 40m's LSC simPlant model, c1lsp. |
|
|
16014
|
Sat Apr 10 10:07:47 2021 |
rana | Update | SUS | Faster coil balancing | I think I mis-spoke about the balancing
channels before. The ~20 Hz balancing
could go into either the COIL banks or the |
|
|
16012
|
Sat Apr 10 08:51:32 2021 |
Jon | Update | CDS | I/O Chassis Assembly | I installed three of the 16-bit ADC adapter
boards assembled
by Koji. Now, the only missing hardware is the |
|
|
16011
|
Fri Apr 9 20:54:54 2021 |
Yehonathan | Update | BHD | SOS assembly | Today I assembled the skeleton of 6 towers,
without clamps and sensor assembly (attachment
1). |
|
|
16010
|
Fri Apr 9 17:41:12 2021 |
rana | Update | SUS | Faster coil balancing | convergence is great.
Next we wanna get the F2A filters
made since most of the IMC control happens |
|
|
16009
|
Fri Apr 9 13:13:00 2021 |
Anchal, Paco | Update | SUS | Faster coil balancing | We ran again this method but with the 'b'
parameter as a matrix instead. This provides
more gain on some off-diagonal terms than |
|
|
16008
|
Thu Apr 8 20:58:17 2021 |
Koji | Update | CDS | ADC adapter boards assembly | 5x 16bit ADC adapter boards (D0902006)
assembled. |
|
|
16007
|
Thu Apr 8 17:04:43 2021 |
Anchal, Paco | Update | SUS | First Successful Coil Balancing | Today, we finally crossed the last hurdle
and got a successful converging coil balancing
run. |
|
|
16006
|
Wed Apr 7 22:48:48 2021 |
gautam | Update | IOO | Waveplate commissioning | Summary:
I spent an hour today evening checking
out the remote waveplate operation. Basic |
|
|
16005
|
Wed Apr 7 17:38:51 2021 |
Anchal | Update | SUS | Trying to uncouple only PIT and YAW first | To test if our method is working at all,
we went for the simpler case of just uncoupling
PIT and YAW. This is also because the sensor |
|
|
16004
|
Wed Apr 7 13:07:03 2021 |
Jordan | Update | SUS | CoM on 3"->2" Adapter Ring for SOS | Adding the chamfer around the edge of the
optic ring did not change the center of mass
relative to the plane from the suspension |
|
|
16003
|
Wed Apr 7 02:50:49 2021 |
Koji | Update | SUS | Flange Inspections | Basically I went around all the chambers
and all the DB25 flanges to check the invac
cable configurations. Also took more time |
|
|
16002
|
Tue Apr 6 21:17:04 2021 |
Koji | Summary | General | PSL HEPA investigation | - Last week we found both of the PSL HEPA
units were not running.
- I replaced the capacitor of the |
|
|
16001
|
Tue Apr 6 18:46:36 2021 |
Anchal, Paco | Update | SUS | Updates on recent efforts | As mentioned in last post, we earlier made
an error in making sure that all time series
arrays go in with same sampling rate in CSD |
|
|
15999
|
Tue Apr 6 15:42:57 2021 |
Yehonathan | Update | BHD | SOS assembly | We got some dumbells from Re-Source Manufacturing
(see attached). I picked 3 in random and
measured their dimensions: |
|
|
15998
|
Tue Apr 6 11:13:01 2021 |
Jon | Update | CDS | FE testing | I/O chassis assembly
Yesterday
I installed all the available ADC/DAC/BIO
modules and adapter boards into the new I/O |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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?
|
|
|
15992
|
Fri Apr 2 15:17:23 2021 |
gautam | Summary | General | HEPA AC cord replacement | From the last failure, I had ordered 2
extra capacitors (they are placed on top
of the PSL enclosure above where the capacitors |
|