| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13257
|
Sun Aug 27 11:57:31 2017 |
rana | Update | ALS | Fiber ALS noise measurement | It seems like the main contribution to
the RMS comes from the high frequency bump.
When using the ALS loop to lock the arm to |
|
|
13260
|
Mon Aug 28 10:28:07 2017 |
Steve | Update | VAC | RGA scan 20 day after 17 Torr | The RGA was turned on 7 days ago.
It's 46 C now. The X-arm room
tem ~20 C |
|
|
13261
|
Mon Aug 28 10:51:21 2017 |
steve | Update | SUS | ETMX damping recovered | |
|
|
13262
|
Mon Aug 28 16:20:00 2017 |
gautam | Update | CDS | 40m files backup situation | This elog is meant
to summarize the current backup situation |
|
|
13263
|
Mon Aug 28 17:13:57 2017 |
ericq | Update | CDS | 40m files backup situation | In addition to bootable full disk backups,
it would be wise to make sure the important
service configuration files from each machine |
|
|
13264
|
Mon Aug 28 23:22:56 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I moved the axuiliary NPRO to the PSL table
today and started setting up the optics.
The Faraday Isolator was showing |
|
|
13265
|
Tue Aug 29 01:52:22 2017 |
gautam | Update | SUS | Test mass actuator calibration | [ericq, gautam]
Tonight, |
|
|
13266
|
Tue Aug 29 02:08:39 2017 |
gautam | Update | ALS | Fiber ALS noise measurement | I was having a chat with EricQ about this
today, just noting some points from our discussion
down here so that I remember to look into |
|
|
13267
|
Tue Aug 29 15:04:59 2017 |
gautam | Update | SUS | ETMY Oplev PIT loop gain changed | Last night, while we were working on the
ALS, I noticed the GTRY spot moving around
(in PITCH) on the CCD monitor in the control |
|
|
13268
|
Tue Aug 29 15:35:19 2017 |
Steve | Update | VAC | vacuum pump specifications & manuals | RP1 and RP3 roughing pump manual of
Leybold D30A oily rotory pump
Fore pump of |
|
|
13270
|
Tue Aug 29 20:04:09 2017 |
rana | Update | PSL | PSL table auxiliary NPRO | I don't understand why the 1st order
diffracted beam doesn't go to zero when
you shut off the drive. My guess is that |
|
|
13271
|
Tue Aug 29 21:36:59 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO |
|
|
|
13273
|
Wed Aug 30 10:54:26 2017 |
gautam | Update | CDS | slow machine bootfest | MC autolocker and FSS loops were stuck
because c1psl |
|
|
13275
|
Wed Aug 30 15:00:06 2017 |
gautam | Update | General | Edgeswitch fiber swap | A couple of minutes ago, Larry W swapped
the fibers to our 40m Edgeswitch (BROCADE
FWS 648G) to a faster connection. This is |
|
|
13276
|
Wed Aug 30 19:49:33 2017 |
gautam | Update | LSC | REFL55 demod board debugging | Summary:
Today
I tried debugging the mysterious increase
in REFL55 signal levels in the DRMI configuration. |
|
|
13278
|
Thu Aug 31 00:19:35 2017 |
rana[^r] | Update | PSL | IMC/FSS FAST gain | nominal changed from 22 to 23 dB to minimize
PC drive RMS
|
|
|
13280
|
Thu Aug 31 00:52:52 2017 |
gautam | Update | LSC | REFL55 whitening board debugging | [rana,gautam] |
|
|
13281
|
Thu Aug 31 03:31:15 2017 |
gautam | Update | LSC | DRMI re-locked! | After our Demod/Whitening electronics investigations
suggested nothing obviously wrong, I decided
to give DRMI locking another go tonight. |
|
|
13282
|
Thu Aug 31 18:36:23 2017 |
gautam | Update | CDS | revisiting Acromag | Current
status:
There
is a single Acromag ADC unit installed in |
|
|
13283
|
Thu Aug 31 21:40:24 2017 |
gautam | Update | General | MC1 kicked again | There was a pretty large glitch in MC1
about an hour ago. The misalignment was so
large that the autolocker wasn't able |
|
|
13284
|
Fri Sep 1 08:25:08 2017 |
Steve | Update | SUS | MC1 glitching | MC1, MC2 and MC3 damping turned off to
see glitching action at 9:57am
|
|
|
13285
|
Fri Sep 1 15:46:12 2017 |
Kira | Update | PEM | temp sensor update | I took off the AD590 and attached it to
two long wires leading out from the board.
This will allow us to attach the sensor to |
|
|
13286
|
Fri Sep 1 16:27:39 2017 |
gautam | Update | SUS | MC1 glitching | I re-enabled the MC SUS damping and IMC
locking for some IFO work just now.
|
|
|
13287
|
Fri Sep 1 16:55:27 2017 |
gautam | Update | Computers | Testpoints now accessible again | Thanks to |
|
|
13288
|
Fri Sep 1 19:15:40 2017 |
gautam | Update | ALS | Fiber ALS noise measurement | Summary:
I
did some work today to see if I could use |
|
|
13289
|
Mon Sep 4 16:30:06 2017 |
gautam | Update | LSC | Oplev loop tweaking | Now that the DRMI locking seems to be repeatable
again, I want to see if I can improve the
measured MICH noise. Recall |
|
|
13290
|
Mon Sep 4 18:18:29 2017 |
rana | Update | LSC | dewhite switching: FOTON settings | not immediately necessary, since you have
already got it sort of working, but one of
these days we should optimize this for real. |
|
|
13291
|
Tue Sep 5 02:07:49 2017 |
gautam | Update | LSC | Low Noise DRMI attempt | Summary:
Tonight, I was able |
|
|
13293
|
Tue Sep 5 14:41:58 2017 |
gautam | Update | CDS | NDS2 server restarted on megatron | I was unable to download data using nds2.
Gabriele had reported similar problems a
week ago but I hadn't followed up on |
|
|
13295
|
Tue Sep 5 17:18:17 2017 |
Kira | Update | PEM | temp sensor update | Today, I stuck on the sensors to a metal
block using a flag, rubber bands, and some
thermal paste (1st attachment). I then wrapped |
|
|
13296
|
Tue Sep 5 17:52:06 2017 |
Kira | Update | PEM | temp sensor update | to get the sensors to read the same values
they have to be in direct thermal contact
with the metal block - there can't be |
|
|
13297
|
Tue Sep 5 23:02:37 2017 |
gautam | Update | CDS | slow machine bootfest | MC autolocker was not working - PCdrive was railed
at its upper rail for ~2 hours judging by |
|
|
13298
|
Tue Sep 5 23:13:44 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I used Gautam's mode measurement of
the auxiliary NPRO (w=127.3um,
z=82mm) for the spacing of the optics |
|
|
13299
|
Wed Sep 6 01:09:11 2017 |
johannes | Update | Computer Scripts / Programs | New set of loss measurements | I
stumbled upon a faster way to stream data from |
|
|
13300
|
Wed Sep 6 23:06:30 2017 |
gautam | Update | LSC | Coil de-whitening switching investigation | Summary:
Rana
suggested checking if the coil de-whitening
switching is actually happening in the analog |
|
|
13301
|
Thu Sep 7 23:09:00 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I brought the DEI Pulser
unit and a suitable Pockels cell
over from Bridge today (I also found an identical |
|
|
13302
|
Fri Sep 8 07:54:04 2017 |
Steve | Update | PEM | M8.1 eq | Nothing tripped. No obvious damage. |
|
|
13303
|
Fri Sep 8 10:22:30 2017 |
Steve | Update | PEM | temp sensor update | The weight of SS can with copper liner
is 12.2 kg
Is 1 Amp for the heating jacket |
|
|
13305
|
Mon Sep 11 09:47:53 2017 |
Steve | Update | General | WIMA caps refilled | Instock WIMA caps refilled to a minimum
50 pieces each. |
|
|
13306
|
Mon Sep 11 12:40:32 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I changed the PSL table auxiliary laser
setup to the 200 MHz AOM and put the light
back in the fiber. Coupling efficiency is |
|
|
13307
|
Mon Sep 11 12:56:40 2017 |
johannes | Update | Computer Scripts / Programs | lossmap attempts | I was trying to get a lossmap measurement
over the weekend but had some trouble first
with the IMC and then with the PMC. |
|
|
13308
|
Mon Sep 11 15:58:02 2017 |
Steve | Update | General | NPRO for repair | This NPRO has a tripping power output******
|
|
|
13309
|
Mon Sep 11 16:46:09 2017 |
Steve | Update | PEM | earthquakes |
|
|
|
13310
|
Mon Sep 11 23:31:50 2017 |
johannes | Update | Cameras | post-vent camera capture comparison | The latest pre-unintended vent captures
of the test mass face cameras were taken
on June |
13x |
|
13311
|
Tue Sep 12 11:44:16 2017 |
Kira | Update | PEM | temp sensor update | Got it to work. A cable was broken and
the AD586 also broke at the same time so
it took a while to find the problem. I had |
|
|
13312
|
Fri Sep 15 15:54:28 2017 |
gautam | Update | CDS | FB wiper script | A wiper script is not yet set up for our
new Frame-Builder. The disk usage is ~80% |
|
|
13313
|
Fri Sep 15 16:00:33 2017 |
gautam | Update | LSC | Sensing measurement | I've been working on analyzing the
data from the DRMI locks last week.
Here are the results of the sensing |
|
|
13314
|
Fri Sep 15 17:08:58 2017 |
gautam | Update | LSC | Coil de-whitening switching investigation | I downloaded a segment of data from the
time when the DRMI was locked with the BS
and ITM coil driver de-whitening switched |
|
|
13315
|
Sat Sep 16 10:56:19 2017 |
rana | Update | LSC | Coil de-whitening switching investigation | The
absence of evidence is not evidence of absence. |
|
|
13317
|
Mon Sep 18 17:17:49 2017 |
gautam | Update | CDS | FB wiper script | After trying to debug this issue using
the Perl debugger, I concluded that the problem
is in the part of the code that splits the |
|