| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12243
|
Tue Jul 5 17:14:02 2016 |
ericq | Update | General | Vent progress | Rough summary of today's progress:
IMC locked, reasonably
aligned. (Only have MC2 trans reference, |
|
|
12246
|
Tue Jul 5 21:51:35 2016 |
ericq | Update | General | Vent progress | One glitch was seen to occur without a
change in the output voltage monitors in ELOG |
|
|
12263
|
Thu Jul 7 00:25:07 2016 |
ericq | Update | General | Vent progress - ETMX SUS Coil driver electronics investigation | It may be advantageous to look at the coil
output data from when the OSEM damping is
on, to try and reproduce the real output |
|
|
12268
|
Thu Jul 7 15:23:39 2016 |
ericq | Update | General | SUS Vmon | Based on Koji's observation of a flat
TF, it seems more likely the Vmon channels
are looking at the path I've highlighted |
|
|
12274
|
Fri Jul 8 14:03:26 2016 |
ericq | Update | General | ETMX removed from suspension | ETMX is currently in the clean room, the
barrel is the tiniest bit submerged in acetone
that will remove a guide rod, standoff, and |
|
|
12276
|
Fri Jul 8 16:33:26 2016 |
ericq | Update | General | ETMX removed from suspension | The magnet, guide rod, and standoff came
off without too much force. However, some
epoxy residue remains on the barrel. I didn't |
|
|
12283
|
Sun Jul 10 15:38:01 2016 |
ericq | Update | General | ETMX in guiderod/standoff gluing fixture | I was hoping to glue a standoff and guide
rod today, but some problems have reared
their heads. Story follows: |
6x |
|
12284
|
Sun Jul 10 15:54:23 2016 |
ericq | Update | CDS | All models restarted | For some reason, all of the non-IOP models
on the vertex frontends had crashed.
To get all of the bits green, I |
|
|
12285
|
Sun Jul 10 17:33:00 2016 |
ericq | Update | General | Vent progress | It took a little time, but I relocked the
IMC and realigned to the point where the
PRC is flashing, visible on REFL and AS, |
|
|
12290
|
Tue Jul 12 09:18:12 2016 |
ericq | Update | General | Slippery substance mystery | I found a note on Steve's desk that R.
Abbott left yesterday afternoon about an
unidentified slippery substance being present |
|
|
12292
|
Tue Jul 12 16:08:00 2016 |
ericq | Update | General | ETMX ruby guided gluing | [ericq, Koji]
We have positioned and applied
epoxy to one ruby standoff on ETMX, for overnight |
|
|
12316
|
Wed Jul 20 14:03:01 2016 |
ericq | Update | SUS | Effect of thicker ruby standoffs | The new ETMX ruby guide rods are slightly
thicker than the old aluminum ones; specifically
1.27mm vs 1.0mm. |
|
|
12322
|
Thu Jul 21 17:01:59 2016 |
ericq | Update | General | ETMX magnet gluing/guiderod excess glue removed | One step forward, two steps back...
While attempting to suspend ETMX,
I broke off a side magnet |
|
|
12328
|
Sun Jul 24 03:43:56 2016 |
ericq | Update | General | Magnet positioning | When Koji and I were gluing magnets to
ETMY, we decided to position the side magnet
based on the empirically observed offsets |
|
|
12331
|
Mon Jul 25 13:01:49 2016 |
ericq | Update | General | ETMX suspension - progress | (Full resolution versions of the photos
in this ELOG are on picasa)
The OSEM gender changers were not |
|
|
12336
|
Tue Jul 26 09:56:34 2016 |
ericq | Update | CDS | c1susaux restarted | c1susaux (which controls watchdogs and
alignments for all non-ETM optics) was down,
the last BURT was done yesterday around 2PM. |
|
|
12345
|
Thu Jul 28 03:22:28 2016 |
ericq | Update | General | ETMX magnets re-reglued | [gautam, ericq]
Brief summary, some pictures and
such follow in the daytime. |
|
|
12351
|
Fri Jul 29 03:32:30 2016 |
ericq | Update | General | ETMX suspended once more | [gautam, ericq]
Tonight's progress on ETMX:
All pickle pickers removed |
|
|
12353
|
Fri Jul 29 03:59:55 2016 |
ericq | Update | SUS | In air OSEM diagonalization check | The question arose whether we can get good
enough data to diagonize our OSEM sensing
matrices in air. |
|
|
12410
|
Mon Aug 15 14:34:33 2016 |
ericq | Update | SUS | SOS sus wire ordered | We have indeed seen numerous tarnished/rusty
points along the wires, and just tried to
choose lengths free of any of these. I wonder |
|
|
12416
|
Wed Aug 17 08:47:43 2016 |
ericq | Update | SUS | Air-bake finished | I turned off the air bake oven at 8:45AM.
I'll leave the optics alone for a bit
while it cools. |
|
|
12441
|
Thu Aug 25 15:43:29 2016 |
ericq | Update | SUS | OSEM issues | We've seen for some time now that one
of the PRM OSEM signals has been gone, and
all of the SRM signals seem dark. We had |
|
|
12447
|
Fri Aug 26 14:09:46 2016 |
ericq | Update | SUS | ETMY UL sensor problematic | We do indeed have a box of clean spare
OSEMs, it should be out with all of the other
boxes of clean stuff we had for the suspension |
|
|
12504
|
Mon Sep 19 11:11:43 2016 |
ericq | Update | SUS | Alignment status | [ericq, Steve]
ITMX is free, OSEM signals all
rougly centered. |
|
|
12507
|
Mon Sep 19 22:03:10 2016 |
ericq | Update | General | Further recovery progress | [ericq, Lydia, Teng]
Brief summary of this afternoon's
activities: |
|
|
12510
|
Wed Sep 21 01:08:02 2016 |
ericq | Update | General | Further recovery progress | The misalignment wasn't as bad as I
had intially feared; the spot was indeed
pretty high on ETMX at first. Both transmon |
|
|
12515
|
Thu Sep 22 22:52:08 2016 |
ericq | Update | General | Damping found to be on | Just a heads up, it looks like the damping
came on at around 8:30pm. Not sure why. |
|
|
12516
|
Fri Sep 23 01:09:04 2016 |
ericq | Update | SUS | ETMX hysteresis test | I had hoped to do some ALS work, but I
realized too late that we loaned our HP analyzer
to Andrew. I decided instead to do some ETMX |
|
|
12517
|
Sat Sep 24 11:04:00 2016 |
ericq | Update | SUS | ETMX hysteresis test | Seems like the angular position was fairly
stable, though there is some change in the
ETMX pitch that could be hysterisis or normal |
|
|
12521
|
Wed Sep 28 04:27:33 2016 |
ericq | Update | General | mucking about | PMC was terribly misaligned. The PMCR camera
seems to have drifted somewhat off target
too, but I didn't touch it. |
|
|
12527
|
Sat Oct 1 10:03:28 2016 |
ericq | Update | General | mucking about | Some things I did last night:
I measured the X PDH OLG, and turned
the gain down by ~6dB to bring the UGF back |
|
|
12529
|
Tue Oct 4 02:59:48 2016 |
ericq | Update | General | mucking about | [ericq, gautam]
We poked around trying to figure
out the X PDH situation. In brief, the glitchiness |
|
|
12535
|
Thu Oct 6 03:56:43 2016 |
ericq | Update | LSC | Revival Attempt | [ericq, Gautam, Lydia]
We spent some time tonight trying
to revive the PRFPMI. (Why PR instead of |
|
|
12546
|
Tue Oct 11 00:43:50 2016 |
ericq | Update | SUS | PRM LR problematic again | Tonight, and during last week's locking,
we noticed something intermittently kicking
the PRM. I've determined that PRM's |
|
|
12547
|
Tue Oct 11 02:48:43 2016 |
ericq | Update | LSC | Revival Attempts | Still no luck relocking, but got a little
further. I disabled the output of the problematic
PRM OSEM, it seems to work ok. Looking at |
|
|
12556
|
Thu Oct 13 00:23:54 2016 |
ericq | Update | VAC | Pre-vent prep | I have completed the following non-Steve
portions of the pre-vent checklist [wiki-40m.ligo.caltech.edu]
Center all oplevs, transom |
|
|
12585
|
Thu Oct 27 23:29:47 2016 |
ericq | Update | General | PRFPMI locked, arms loss improved | As Gautam mentioned, we had some success
locking the PRFPMI last
night. (SRM satellite box is still in surgery...) |
|
|
12591
|
Wed Nov 2 12:05:00 2016 |
ericq | Update | ASC | Quick WFS thoughts | I poked around a bit thinking about what
we need for a single AS WFS.
New things that we would need: |
|
|
12597
|
Thu Nov 3 13:36:16 2016 |
ericq | Update | CDS | c1pem revamped | It seems that the EX and EY BLRMS banks
were missing the BP and LP filters for the
0.03-0.1 and 0.1-0.3 bands. I've copied |
|
|
12608
|
Wed Nov 9 11:40:44 2016 |
ericq | Update | CDS | safe.snap BURT files now in svn | This is long overdue, but our burt files
for SDF now live in the LIGO userapps SVN,
as they should. |
|
|
12672
|
Wed Dec 7 11:52:48 2016 |
ericq | Update | IMC | Partial IMC ringdowns | The transients are likely due to doppler
interference due to the input laser frequency
sloshing due to errant control signals after |
|
|
12719
|
Sat Jan 14 12:36:57 2017 |
ericq | Update | DAQ | minute trends missing | Yes, writing minute trends causes hourly
FB crashes in the current state of things.
The "raw" minute trending is turned |
|
|
12732
|
Wed Jan 18 12:34:21 2017 |
ericq | Summary | IOO | MCL / MCF / Calibration |
|
|
|
12733
|
Wed Jan 18 12:46:47 2017 |
ericq | Update | Computer Scripts / Programs | nodus web apache simlinks too soft |
|
|
|
12740
|
Thu Jan 19 16:36:35 2017 |
ericq | Update | Computer Scripts / Programs | nodus web apache simlinks too soft |
|
|
|
12776
|
Tue Jan 31 15:08:13 2017 |
ericq | Metaphysics | CDS | Minute Trend Koan | A novice was learning at the feet of Master
Daqd. At the end of the lesson he looked
through his notes and said, “Master, |
|
|
12779
|
Tue Jan 31 20:25:26 2017 |
ericq | Summary | CDS | Minute Trend Koan |
|
|
|
12796
|
Fri Feb 3 11:40:34 2017 |
ericq | Summary | CDS | /cvs/cds/caltech/chans back on svn1.6 | I was able to bring back svn 1.6 formatting
to /cvs/cds/caltech/chans by doing the following
on nodus: |
|
|
12830
|
Wed Feb 15 09:06:13 2017 |
ericq | Update | DAQ | panels and pcbs | The amplifier unit should use the three
pin dsub connectors (3w3?) that we use on
many of the other units for DC power, and |
|
|
12962
|
Mon May 1 21:45:54 2017 |
ericq | Update | General | DRMI locking | Comparing counts doesn't get you anywhere;
each PD has different whitening gain which
may vary from measurement to measurement. |
|