| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14335
|
Fri Dec 7 17:04:18 2018 |
gautam | Update | IOO | IMC transmission |
Power just before PSL shutter on
PSL table = 97 |
|
|
14334
|
Fri Dec 7 12:51:06 2018 |
gautam | Update | IMC | IMC ringdown fitting | I started putting together some code to
implement some ideas we discussed at the
Tuesday meeting here. Pipeline isn't |
|
|
14333
|
Thu Dec 6 17:33:33 2018 |
Jon | Omnistructure | General | N2 line disconnected | I believe I finally have the N2 gauge working
correctly. The wiring is unchanged from its
original state and the controller has been |
|
|
14332
|
Thu Dec 6 11:16:28 2018 |
aaron | Update | OMC | OMC channels | I need to hookup +/- 24 V supplies to the
OMC whitening/dewhitening boxes that have
been added to 1X2. |
|
|
14331
|
Tue Dec 4 18:24:05 2018 |
gautam | Omnistructure | General | N2 line disconnected | [jon, gautam]
In the latest installment in this
puzzler: turns out that maybe the trend of |
|
|
14330
|
Tue Dec 4 10:38:12 2018 |
Jon | Omnistructure | Upgrade | Updated Feedthrough List for Vacuum Acromag Chassis | Based on new input from Chub, attached
is the revised list of signal cable
feedthroughs needed on the vacuum system |
|
|
14329
|
Sun Dec 2 19:32:35 2018 |
rana | Update | IOO | fit times | need to vary start/stop times in fit to
test for systematics |
|
|
14328
|
Sun Dec 2 17:26:58 2018 |
gautam | Update | IMC | IMC ringdown fitting | Recently we wondered at the meeting what
the IMC round trip loss was. I had done several
ringdowns in the winter of 2017, but because |
|
|
14327
|
Sun Dec 2 16:08:44 2018 |
Jon | Omnistructure | Upgrade | Feedthroughs for Vacuum Acromag Chassis | Below is an inventory of the signal
feedthroughs that need to be installed on
the vacuum Acromag crate this week. |
|
|
14326
|
Fri Nov 30 19:37:47 2018 |
gautam | Update | LSC | LSC feedforward block diagram | I wanted to set up an RTCDS model to understand
this problem better. Attachment #1 is the
simulink diagram of the signal flow. The |
|
|
14325
|
Fri Nov 30 15:53:52 2018 |
Jon | Omnistructure | General | N2 pressure gauge fix | I've made a repair to the N2 pressure
monitor. I don't believe the polarity
of the analog signal into the controller |
|
|
14324
|
Thu Nov 29 17:46:43 2018 |
gautam | Update | General | Some to-dos | [koji,
gautam, jon, steve]
We suspect analog voltage |
|
|
14323
|
Thu Nov 29 08:13:33 2018 |
Steve | Update | PEM | EQ 3.9m So CA | EQ did not trip anything. atm1
Just
a REMINDER:
our vacuum system is at atm to help the vacuum |
|
|
14322
|
Tue Nov 27 17:06:51 2018 |
Steve | Configuration | VAC | Agilent 84FS turbo installed as TP2 | Chub & Steve, |
|
|
14321
|
Tue Nov 27 10:50:20 2018 |
Steve | Update | PEM | earth quake Mexico | Nothing tripped.
|
|
|
14320
|
Mon Nov 26 21:58:08 2018 |
Jon | Omnistructure | | Serial Vacuum Signals | All the serial vacuum signals are now interfaced
to the new digital controls system. A set
of persistent Python scripts will query each |
|
|
14319
|
Mon Nov 26 17:16:27 2018 |
gautam | Update | SUS | EY chamber work | [steve,
rana, gautam]
PSL and EY 1064nm laser |
|
|
14318
|
Mon Nov 26 15:58:48 2018 |
Steve | Update | VAC | Vent 81 | Gautam, Aaron, Chub & Steve,
ETMY heavy door replaced by light
one. |
|
|
14317
|
Mon Nov 26 15:43:16 2018 |
aaron | Update | OMC | OMC scanning/aligning script | I've started testing the OMC channels
I'll use.
I needed to update the model, because |
|
|
14316
|
Mon Nov 26 10:22:16 2018 |
aaron | Update | General | projector light bulb replaced | I replaced the projector bulb. Previous
bulb was shattered. |
|
|
14315
|
Sun Nov 25 17:41:43 2018 |
Jon | Omnistructure | | Vacuum Controls Upgrade - Status and Plans | New hardware has been installed in the
vacuum controls rack. It is shown in the
below post-install photo. |
|
|
14314
|
Wed Nov 21 16:48:11 2018 |
gautam | Update | COC | EY mini cleanroom setup | With Chub's help, I've setup a
mini cleanroom at EY - Attachment
#1. The HEPA unit is running on |
|
|
14313
|
Wed Nov 21 09:59:26 2018 |
gautam | Update | LSC | LSC feedforward block diagram | Attachment
#1 is a block diagram depicting
the pathway by which the vertex DOF control |
|
|
14312
|
Tue Nov 20 20:33:11 2018 |
aaron | Update | OMC | OMC scanning/aligning script | I finished running the cabling for the
OMC, which involved running 7x 50ft DB9 cables
from the OMC_NORTH rack to the 1X2 rack, |
|
|
14311
|
Tue Nov 20 17:38:13 2018 |
rana | Update | Upgrade | New Coffee Machine | Rana, Aaron, Gautam
The |
|
|
14310
|
Tue Nov 20 13:13:01 2018 |
gautam | Update | VAC | IMC alignment is okay | I checked the IMC alignment following the
vent, for which the manual beam block placed
on the PSL table was removed. The alignment |
|
|
14309
|
Mon Nov 19 23:38:41 2018 |
Jon | Omnistructure | | Vacuum Acromag Channel Assignments | I've completed bench testing of all
seven vacuum Acromags installed in a custom
rackmount chassis. The system contains |
|
|
14308
|
Mon Nov 19 22:45:23 2018 |
Jon | Omnistructure | | Vacuum System Subnetwork | I've set up a closed subnetwork for
interfacing the vacuum hardware (Acromags
and serial devices) with the new controls |
|
|
14307
|
Mon Nov 19 22:01:50 2018 |
gautam | Update | VAC | Loose nut on valve | As I was turning off the lights in the
VEA, I heard a rattling sound from near the
PSL enclosure. I followed it to a valve - |
|
|
14306
|
Mon Nov 19 17:09:00 2018 |
Steve | Update | VAC | Vent 81 | Gautam, Aaron, Chub and Steve,
|
|
|
14305
|
Mon Nov 19 14:59:48 2018 |
Chub | Update | VAC | Vent 81 | Vent 80 is nearly complete; the instrument
is almost to atmosphere. All four ion
pump gate valves have been disconnected, |
|
|
14304
|
Sun Nov 18 17:09:02 2018 |
gautam | Update | General | Vent prep | Vent prep
Following the checklist,
I did these: |
|
|
14303
|
Sun Nov 18 00:59:33 2018 |
gautam | Update | General | Vent prep | I've begun prepping the IFO for the
vent, and completed most of the IFO related
items on the checklist. |
|
|
14302
|
Sat Nov 17 18:59:01 2018 |
aaron | Update | IOO | IMC problematic | I made additional measurements on the x
and y arms, at 5 offset positions for each
arm (along with 6 measurements at the "zeroed" |
|
|
14301
|
Fri Nov 16 15:09:31 2018 |
Steve | Configuration | VAC | not venting cryo and ion pumps | Notes on the ion pumps and cryo pump:
Our
4 ion pumps were closed off for a lomg time.
I estmated their pressure to be around ~1 |
|
|
14300
|
Fri Nov 16 10:53:07 2018 |
aaron | Update | IOO | IMC problematic | Back to loss measurements.
I replaced the PD I've been
using for the AS beam. |
|
|
14299
|
Fri Nov 16 10:26:12 2018 |
Steve | Update | VAC | single viton O-rings | The 40m vacuum envelope has one large single
O-ring on the OOC west side. All other doors
have double O-ring with annuloses. |
|
|
14298
|
Fri Nov 16 00:47:43 2018 |
gautam | Update | LSC | More DRMI characterization | Summary:
More DRMI characterization
was done.
I was working on trying |
|
|
14297
|
Thu Nov 15 10:21:07 2018 |
aaron | Update | IOO | IMC problematic | I ran a BNC from the PD on the AS table
along the cable rack to a free ADC channel
on the LSC whitening board. I lay the BNC |
|
|
14296
|
Wed Nov 14 21:34:44 2018 |
Jon | Omnistructure | | Vacuum Acromags installed and tested | All 7 Acromag units are now installed in
the vacuum chassis. They are connected to
24V DC power and Ethernet. |
|
|
14295
|
Wed Nov 14 18:58:35 2018 |
aaron | Update | DAQ | New DAC for the OMC | I began moving the AA and AI chassis over
to 1X1/1X2 as outlined in
the elog. |
|
|
14294
|
Wed Nov 14 14:35:38 2018 |
Steve | Update | ALARM | emergency calling list for 40m Lab | It is posted at the 40m
wiki with Gautam' help. Printed copies
posted around doors also. |
|
|
14293
|
Tue Nov 13 21:53:19 2018 |
gautam | Update | CDS | RFM errors | This
problem resurfaced, which I noticed when
I couldn't get the single arm locks going. |
|
|
14292
|
Tue Nov 13 18:09:24 2018 |
gautam | Update | LSC | Investigation of SRCL-->MICH coupling | Summary:
I've been looking into the
cross-coupling from the SRCL loop control |
|
|
14291
|
Tue Nov 13 16:15:01 2018 |
Steve | Update | VAC | rga scan pd81 at day 119 |
|
|
|
14290
|
Mon Nov 12 13:53:20 2018 |
rana | Update | IOO | loss measurement: oscope vs CDS DAQ | sstop using the ssscope, and just put the
ssssignal into the DAQ with sssssome whitening.
You'll get 16 bitsśšß. |
|
|
14289
|
Sat Nov 10 17:40:00 2018 |
aaron | Update | IOO | IMC problematic | Gautam was doing some DRMI locking, so
I replaced the photodiode at the AS port
to begin loss measurements again. |
|
|
14288
|
Sat Nov 10 17:32:33 2018 |
gautam | Update | LSC | Nulling MICH->PRCL and MICH->SRCL | With the DRMI locked, I drove a line in
MICH using the sensing matrix infrastructure.
Then I looked at the error points of MICH, |
|
|
14287
|
Fri Nov 9 22:24:22 2018 |
Jon | Omnistructure | | Wiring of Vacuum Acromag Chassis Complete | Wiring of the power, Ethernet, and indicator
lights for the vacuum Acromag chassis is
complete. Even though this crate will only |
|
|
14286
|
Fri Nov 9 15:00:56 2018 |
gautam | Update | IOO | No IFO beam as TT1 UL hijacked for REFL55 check | This
problem resurfaced. I'm doing the
debugging. |
|