| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12487
|
Tue Sep 13 16:16:28 2016 |
Chris | Omnistructure | VAC | vacuum interlock bypassed | (Steve, Chris)
The pumpdown had stalled because
of some ancient vacuum interlock code that |
|
|
12488
|
Tue Sep 13 17:47:04 2016 |
Steve | Update | VAC | pumpdown 79 completed | P1 IFO pressure is 1 mTorr, valve configuration: vacuum normal,
annulosses are pumped, RGA is off, not pumped. |
|
|
12489
|
Tue Sep 13 19:02:56 2016 |
Teng | Update | General | ITMX sensor | [Lydia,Teng]
Something strange happened to the
ITMX osem reading around 4.pm. PDT as shown |
|
|
12490
|
Tue Sep 13 19:18:43 2016 |
Lydia | Update | SUS | Diagonalization in air | [Lydia, Teng]
We continued to work on the diagonalization
scripts today and devised a way of choosing |
|
|
12491
|
Wed Sep 14 09:33:54 2016 |
Steve | Update | General | ITMX magnets are stucked | I believe that the UR and LR magnets are
stuck. There was no earth quake at 16:18
yesterday. Something had to kick it into |
|
|
12492
|
Wed Sep 14 09:44:09 2016 |
Steve | Update | VAC | pumpdown 79 completed | The pumpdown started at
9-12-2016
The IFO is at 5e-5 Torr vacuum |
|
|
12493
|
Wed Sep 14 19:41:23 2016 |
Johannes | Update | General | PSL back to high power | Today's summary:
Replaced mirror in MC REFL
path with R=10% BS and aligned beam on PD |
|
|
12494
|
Wed Sep 14 20:05:32 2016 |
Lydia | Update | General | ITMX magnets are stucked | When I restarted c1susaux yesterday, I
didn't know that I needed to disable
the coil outputs first. So when it came back |
|
|
12495
|
Wed Sep 14 20:27:03 2016 |
Lydia | Update | SUS | Diagonalization | Today the main optics were free swinging
for several hours, so I attempted diagonalization
in vacuum. |
|
|
12496
|
Thu Sep 15 10:36:32 2016 |
Steve | Update | VAC | pumpdown 79 day 3 | IFO pressure 3.7e-5 Torr at new cold cathode
InstruTech - Hornet
New |
|
|
12497
|
Thu Sep 15 18:37:20 2016 |
Lydia | Update | SUS | Diagonalization | [Teng, Lydia]
We fixed the 60Hz filter
on ITMY. This improved the phase problems |
|
|
12498
|
Fri Sep 16 14:15:28 2016 |
steve | Update | PEM | partical counts | South end flow bench and both clean room
assembly flow benches measured zero counts
for 0.3 and 0.5 micron size particales. |
|
|
12499
|
Fri Sep 16 19:14:27 2016 |
Lydia | Update | SUS | Diagonalization | [Lydia, Teng]
We built matrices for ITMY
and ETMY by driving one degree of freedom |
|
|
12500
|
Fri Sep 16 19:48:52 2016 |
Lydia | Update | General | Alignment status | Today the Y arm was locking fine. The alignment
had drifted somewhat so I ran the dither
and TRY returned to ~0.8. However, the mode |
|
|
12501
|
Sat Sep 17 02:00:23 2016 |
rana | Update | SUS | Alignment status | All is not lost. I've stuck and unstuck
optics around a half dozen times. Can you
please post the zoomed in time series (not |
|
|
12502
|
Sat Sep 17 16:51:01 2016 |
Lydia | Update | SUS | Alignment status | Here's the timeseries plots. I've
zoomed in to right after the problem- did
you want before? We pretty much know |
|
|
12503
|
Sun Sep 18 16:18:05 2016 |
rana | Update | SUS | Alignment status | susaux is responsible for turning on/off
the inputs to the coil driver, but not the
actual damping loops. So rebooting susaux |
|
|
12504
|
Mon Sep 19 11:11:43 2016 |
ericq | Update | SUS | Alignment status | [ericq, Steve]
ITMX is free, OSEM signals all
rougly centered. |
|
|
12505
|
Mon Sep 19 13:25:03 2016 |
Teng | Update | Electronics | Satellite Amplifier |
In order to figure out the difference
betweent simulated result and measurement, |
|
|
12506
|
Mon Sep 19 13:57:21 2016 |
rana | Update | General | never post EPS files in the ELOG. Ever. | http://tex.stackexchange.com/questions/2092/which-figure-type-to-use-pdf-or-eps |
|
|
12507
|
Mon Sep 19 22:03:10 2016 |
ericq | Update | General | Further recovery progress | [ericq, Lydia, Teng]
Brief summary of this afternoon's
activities: |
|
|
12508
|
Tue Sep 20 10:45:06 2016 |
rana | Update | General | Further recovery progress | Rana suspicious. We had arms locked before
pumpdown with beams on Transmon PDs. If they're
off now, must be beams are far off on the |
|
|
12509
|
Tue Sep 20 17:04:46 2016 |
Steve | Update | Electronics | REF33 | REF33 was removed for taking picture of
the bare C30362 InGaAs photodiode per Rana's
request. All other rf photodiodes have their |
|
|
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 |
|
|
12511
|
Wed Sep 21 09:04:57 2016 |
Steve | Update | General | 8 hours recovery progress | Good 8 hours
|
|
|
12512
|
Thu Sep 22 15:44:21 2016 |
Steve | Update | General | ITMX magnets are stucked again |
|
|
|
12513
|
Thu Sep 22 20:01:47 2016 |
Lydia | Update | General | ITMX freed, all optics kicked | Rana came by and freed ITMX again. I think
it shouldn't be a problem for me to free
it if it happens again. |
|
|
12514
|
Thu Sep 22 20:18:27 2016 |
Lydia | Update | General | Acromag Progress | We moved the Acromag and its power supply
to the X end, where we connected it to the
diagnostic output of the NPRO controller. |
|
|
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 |
|
|
12518
|
Mon Sep 26 19:48:09 2016 |
Lydia | Update | SUS | ITMX stuck again, ITMY whitening issue | This afternoon around 2:45, ITMX started
ringing up at ~.9Hz for about a minute and
then |
|
|
12519
|
Tue Sep 27 08:49:47 2016 |
Steve | Update | SUS | seismic activity is up | The earth quake shook ITMX free for a
short while.
|
|
|
12520
|
Tue Sep 27 18:04:50 2016 |
Lydia | Update | SUS | ITMX slow channels down, ITMY diagonalization update | [Teng, Lydia]
When we plugged in the back cables
yesterday on the whitening boxes after switching |
|
|
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. |
|
|
12522
|
Thu Sep 29 09:49:53 2016 |
rana | Update | General | mucking about | With the WFS and OL, we never have figured
out a good way to separate pit and yaw. Need
to figure out a reference for up/down and |
|
|
12523
|
Thu Sep 29 16:19:29 2016 |
Lydia | Update | SUS | Free swing eigenmodes | [Lydia, Teng]
Motivated by the strange pitch/yaw
coupling behavior we ran into while doing |
|
|
12524
|
Thu Sep 29 20:21:29 2016 |
Johannes | Update | General | YARM loss measurement | [Gautam, Johannes]
I scripted a series of YARM DC
reflectivity measurements last night alternating |
|
|
12525
|
Fri Sep 30 10:37:57 2016 |
Steve | Update | VAC | vacuum VME machines rebooted | [ Gautam and Steve ]
c1vac1 and c1vac2 were rebooted
and the gauges are communicating now. V1, |
|
|
12526
|
Fri Sep 30 19:53:07 2016 |
gautam | Update | endtable upgrade | X end IR pickoff fiber coupled | [johannes, gautam]
Today we re-installed the fiber
coupler on the X-endtable to couple some |
|
|
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 |
|
|
12528
|
Mon Oct 3 21:24:02 2016 |
Johannes | Update | General | XARM loss measurement | [gautam, johannes]
I started a script on Friday night
to collect some data for a reflection armloss |
|
|
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 |
|
|
12530
|
Tue Oct 4 11:02:31 2016 |
Steve | Update | VAC | RGA is out of order | The last good rga scan at vent 78
day 38
|
|
|
12531
|
Tue Oct 4 22:18:24 2016 |
Johannes | Update | General | X/YARM loss measurement | [gautam, johannes]
We let the PSL shutter closed overnight
and observed the POXDC, POYDC and ASDC offsets. |
|
|
12532
|
Wed Oct 5 16:28:10 2016 |
gautam | Update | endtable upgrade | EX laser power monitor PD installed | I installed a 10% BS to pick off some of
the light going to the IR fiber, and have
added a Thorlabs PDA55 PD to the EX table |
|
|
12533
|
Wed Oct 5 19:10:04 2016 |
gautam | Update | General | Arm loss measurement review | [ericq,gautam]
There are multiple methods by which
the arm loss can be measured, including, |
|
|
12534
|
Wed Oct 5 19:43:13 2016 |
gautam | Summary | General | Vent review | This elog is meant to review some of the
important changes made during the vent this
summer - please add to this if I've forgotten |
|
|
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 |
|
|
12536
|
Thu Oct 6 15:42:51 2016 |
Lydia | Update | SUS | Output matrix diagonalization | Summary: At the 40m meeting yesterday,
Eric Q. gave the suggestion that we
accept the input matrix weirdness and adjust |
|