| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11626
|
Mon Sep 21 11:40:30 2015 |
ericq | Update | General | Megatron maitenence | The MC autolocker and FSSslow scripts weren't
running on Megtron. These were started by
running the following commands on megatron: |
|
|
11627
|
Mon Sep 21 15:22:19 2015 |
jamie | Update | DAQ | working on new fb replacement | I've been putting together a new machine
that Rolf got for us as a replacement for
fb. |
|
|
11628
|
Mon Sep 21 18:31:06 2015 |
gautam | Summary | Computer Scripts / Programs | Frequency counting algorithm | I have been
working on setting up a frequency counting
module that can give us a readout of the |
6x |
|
11629
|
Mon Sep 21 23:18:55 2015 |
ericq | Summary | Computer Scripts / Programs | Frequency counting algorithm | I definitely think lowpassing the output
is the way to go. Since this frequency readback
will be used for slow control of the beatnote |
|
|
11631
|
Tue Sep 22 02:11:17 2015 |
rana | Summary | Computer Scripts / Programs | Frequency counting algorithm | I was going to suggest using a software
PLL, but perhaps averaging gives the same
result. The same ADC signal can be fed to |
|
|
11632
|
Tue Sep 22 03:48:18 2015 |
ericq | Update | LSC | DRMI tweaked, briefly held with ALS arms | Given the RF component power supply grounding,
POP110, POP22 and REFL165 all changed somewhat.
They have all been rephased for the DRMI, |
|
|
11633
|
Tue Sep 22 08:58:38 2015 |
Steve | Update | VAC | cold cathode is flaky | The cold cathode gauge is back to normal.
cc4 is the last gauge is "functioning"
MKS is not responding. The spare |
|
|
11634
|
Tue Sep 22 16:42:39 2015 |
ericq | Update | IOO | Housekeeping | I've moved the OAF MC2 signal path
to go directly from c1oaf to c1mcs, so that
the LSC being ON/OFF doesn't interfere |
|
|
11635
|
Tue Sep 22 16:52:36 2015 |
ericq | Summary | General | Random Notes | Some things bouncing around my head that
haven't made it to ELOG yet:
Last week, Rana and I were |
|
|
11636
|
Tue Sep 22 17:30:55 2015 |
jamie | Update | DAQ | attempts at getting new fb working | Today I've been trying to get the new
frame builder, tentatively 'fb1',
to work. It's not fully |
|
|
11637
|
Wed Sep 23 03:08:50 2015 |
ericq | Update | LSC | DRMI + ALS Arms | [ericq, Gautam]
We can reliably |
|
|
11638
|
Wed Sep 23 10:31:49 2015 |
ericq | Update | LSC | DRMI + ALS Arms | Looking good. How many meters of CARM is
'-1 counts'? |
|
|
11639
|
Wed Sep 23 12:51:03 2015 |
Jenne | Update | LSC | DRMI + ALS Arms | Nice!! |
|
|
11640
|
Thu Sep 24 17:01:37 2015 |
ericq | Update | Computer Scripts / Programs | Freeing up some space on /cvs/cds | I noticed that Chiara's backup HD (which
has a capacity of 1.8TB, vs the main drives
2TB) was near to getting full, meaning that |
|
|
11641
|
Thu Sep 24 17:06:14 2015 |
ericq | Update | Calibration-Repair | C1CAL Lockins | Just a quick note for now: I've repopulated
C1CAL with a limited set of lockin oscillators/demodulators,
informed by the aLIGO common LSC model. Screens |
|
|
11642
|
Fri Sep 25 11:08:33 2015 |
Steve | Update | SUS | wire standoffs | Our last effort to change the existing
Al-6061 wire standoffs was at April 2012
We requested sapphire and/or ruby |
|
|
11643
|
Fri Sep 25 14:52:08 2015 |
Steve | Update | SUS | ETMX is not drifting | We have talked about the drift of ETMX
sus on the Wednesday meeting.
It has stopped moving on Jan 8, |
|
|
11644
|
Fri Sep 25 17:00:38 2015 |
Steve | Update | VAC | cold cathode is flaky | The IFO pressure is estimated ~1E-6 Torr
with modified Vac normal valve configuration.
CC4 is in a jumping mode between |
|
|
11645
|
Fri Sep 25 17:51:11 2015 |
jamie | Update | DAQ | fb replacement work update | Brief update about the fb replacement status.
The new hardware for fb is in the
rack, temporarily sitting on top of megatron, |
|
|
11646
|
Fri Sep 25 19:06:13 2015 |
rana | Update | SUS | ETMX IS drifting | I don't see any evidence of it getting
more stable. It seems there was a big step
in January, but the problem we were talking |
|
|
11647
|
Tue Sep 29 03:14:04 2015 |
gautam | Update | CDS | Frequency divider box | Earlier today, the front panels for the
1U chassis I obtained to house the Wenzel
dividers + RF amplifiers arrived, which meant |
|
|
11648
|
Tue Sep 29 16:52:49 2015 |
ericq | Update | LSC | Fast ALS troubles - unknown zero | Fast ALS control continues to elude me.
I fixed my LPF to take the input
impedance of the CM board input into account; |
|
|
11649
|
Tue Sep 29 18:03:11 2015 |
rana | Update | LSC | use LISO | Use LISO - see what it tells you. I would
think that you should make a differential
RC filter to get the right behavior. (e.g. |
|
|
11650
|
Tue Sep 29 19:38:09 2015 |
gautam | Update | General | FOL fiber box revamp | The new 2x2 fiber couplers arrived today
so Eric gave me an overview on the changes
to be made to the existing configuration |
|
|
11651
|
Wed Sep 30 10:00:02 2015 |
ericq | Update | LSC | used LISO | LISO confirms that I did my algebra right
in picking the component values, and shows
no extra zeros. |
|
|
11652
|
Wed Sep 30 13:07:13 2015 |
gautam | Update | General | FOL fiber box revamp | Eric pointed out that the 1x2 couplers
that were used in the previous arrangement
and which I recycled, were in fact NOT |
|
|
11653
|
Wed Sep 30 13:59:49 2015 |
jamie | Update | DAQ | attempts at getting new fb working | I got Steve to get us a new Myrinet fiber
network adapter card for fb1:
Myrinet 10G-PCIE-8B-S
I |
|
|
11654
|
Wed Sep 30 15:44:06 2015 |
Steve | Update | General | Sun Fire X4600 | Gautam and
Steve,
The decommissioned server |
|
|
11655
|
Thu Oct 1 19:49:52 2015 |
jamie | Update | DAQ | more failed attempts at getting new fb working | Summary
I've not really
been able to make additional progress with
the new 'fb1' DAQ. It's |
|
|
11656
|
Thu Oct 1 20:24:02 2015 |
jamie | Update | DAQ | more failed attempts at getting new fb working | I just realized that when running fb1,
if a single mx_stream dies they all die. |
|
|
11657
|
Thu Oct 1 20:26:21 2015 |
jamie | Update | DAQ | Swapping between fb and fb1 | Swapping between fb and fb1 as DAQ is very
straightforward, now that they are both on
the DAQ network: |
|
|
11658
|
Fri Oct 2 03:29:16 2015 |
ericq | Update | LSC | Fast ALS progress - AO path crossed over, but no high BW | I've been using an SR560 to experiment
with differnent pole frequencies, to try
and cancel the mystery zero. It's after |
|
|
11659
|
Fri Oct 2 15:11:08 2015 |
Steve | Update | PEM | cable squashed | Cable numbered #53 from Accelerometer 4
to 1X7 / DAQ input c26 was squased while
removing network card from Sun Fire x4600 |
|
|
11660
|
Fri Oct 2 15:33:09 2015 |
Steve | Update | safety | safety training | Gautom
has received 40m specific basic safety training
today. |
|
|
11661
|
Sun Oct 4 12:07:11 2015 |
jamie | Configuration | CDS | CSD network tests in progress | I'm about to start conducting some
tests on the CDS network. Things will
probably be offline for a bit. Will |
|
|
11662
|
Sun Oct 4 13:53:30 2015 |
jamie | Update | LSC | SENSMAT oscillator used for EPICS tests | I've taken over one of the SENSMAT
oscillators for a test of the EPICS system.
These are the channels I've |
|
|
11663
|
Sun Oct 4 14:23:42 2015 |
jamie | Configuration | CDS | CSD network test complete | I've finished, for now, the CDS network
tests that I was conducting. Everything
should be back to normal. |
|
|
11664
|
Sun Oct 4 14:28:03 2015 |
jamie | Update | DAQ | more failed attempts at getting new fb working | I tried to look at fb1 again today, but
still haven't made any progress.
The one thing I did notice, though, |
|
|
11665
|
Sun Oct 4 14:32:49 2015 |
jamie | Configuration | CDS | CSD network test complete | Here's an example of the glitches we've
been seeing, as seen in the StripTool trace
of the front end oscillator: |
|
|
11666
|
Mon Oct 5 10:11:35 2015 |
Steve | Update | VAC | RGA scan pd78 day 386 | RGA background scan.
The IFO is closed off from RGA
with VM1 |
|
|
11667
|
Mon Oct 5 11:25:21 2015 |
ericq | Update | SUS | ETMY OL laser dead | Gautam alerted me that the Y arm looked
like it was being dithered, even though the
ASS was turned off. I found that the ETMY |
|
|
11668
|
Mon Oct 5 16:41:22 2015 |
Steve | Update | SUS | ETMY OL laser replaced | This JDSU 1103P laser, sn P892324 lived
for 2 years. It's power output is 0.05
mW now |
|
|
11669
|
Tue Oct 6 03:30:17 2015 |
ericq | Update | LSC | DRFPMI Progress | [ericq, Gautam]
Highlight of the night: the DRFPMI
was held at arm powers > 110 for 20 seconds. |
|
|
11670
|
Tue Oct 6 16:56:40 2015 |
gautam | Update | General | FOL fiber box revamp | [gautam, ericq]
We had a look at the IR beat (PSL+Xarm)
today using the new FOL fiber box, and compared |
|
|
11671
|
Thu Oct 8 04:48:50 2015 |
ericq | Update | LSC | DRFPMI Progress | Progress was made. CARM was stably locked
on RF only. DARM was RF only for a few moments
before I typed in a wrong number... |
|
|
11672
|
Thu Oct 8 13:13:20 2015 |
Koji | Update | LSC | DRFPMI Progress | Please clarify: I wonder if you were at
the zero offset for CARM and DARM or not.
I am 25% excited right now. |
|
|
11673
|
Thu Oct 8 14:14:50 2015 |
ericq | Update | LSC | DRFPMI Progress |
|
|
|
11674
|
Thu Oct 8 16:48:23 2015 |
Koji | Update | LSC | DRFPMI Progress | Awesome |
|
|
11675
|
Thu Oct 8 21:35:49 2015 |
rana | Update | LSC | DRFPMI Progress | Give us a lockloss or other kind of time
series plot so we can bask in the glory. |
|
|
11676
|
Fri Oct 9 09:22:38 2015 |
ericq | Update | LSC | DRFPMI Progress | |
|