| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
9997
|
Tue May 27 22:29:17 2014 |
Jenne | Update | PSL | PSL making noises | Also, while I was working on the PSL table,
I heard noise that sounded like a bearing
rolling around. I suspected the HEPAs, |
|
|
9996
|
Tue May 27 21:48:31 2014 |
Jenne | Update | LSC | X green broadband PD not working???!? | Grr. I am very frustrated.
After lunch I redid alignment for both X
and Y green systems (Yarm both at the end |
|
|
9995
|
Tue May 27 11:58:45 2014 |
Jenne | Update | Electronics | Amplifier removed from BeatX path | Sorry, I had been in a hurry when I worked
on this last week, and again when I wrote
the elog, but I wanted to at least put in |
|
|
9994
|
Tue May 27 11:00:43 2014 |
Steve | Update | VAC | RGA scan at day 111 |
Rga scan at pump down 77, vacuum
normal valve configuration, maglev rotation |
|
|
9993
|
Mon May 26 20:10:14 2014 |
ericq | Update | PSL | PMC relocked | I came in and PMC transmission was at 0.5V,
and ETMX was swinging around a lot, (LSC
mode was on). |
|
|
9992
|
Mon May 26 07:59:23 2014 |
Koji | Update | Electronics | Amplifier removed from BeatX path | And the out-of-loop level of the ALSX compared
with the previous measurement is ...?
|
|
|
9991
|
Sat May 24 22:56:57 2014 |
Jenne | Update | Electronics | Amplifier removed from BeatX path | I just realized that I forgot to elog this,
but yesterday afternoon I bypassed the amplifier
in the BeatX path, and now the X beatnote |
|
|
9990
|
Fri May 23 11:58:28 2014 |
manasa | Update | Green Locking | Y arm green alignment tuned | The Y arm green transmission had come down
to 0.3 and the green steering mirrors on
the Y end table required some minor alignment |
|
|
9989
|
Thu May 22 11:21:06 2014 |
Steve | Update | SUS | ETMX oplev |
|
|
|
9988
|
Thu May 22 00:30:40 2014 |
manasa | Update | LSC | ALS X noise from angular motion of mirrors | Below are the transfer functions measured
between the angular (pit, yaw) motion of
X arm mirrors and the ALSX error signal. |
|
|
9986
|
Wed May 21 22:15:37 2014 |
ericq | Update | PSL | PMC relocked | PMC has been unlocked for ~4hrs, not sure
why. It's servo gain was down at -10dB...
Relocked with transmission of .76V, |
|
|
9984
|
Wed May 21 13:51:19 2014 |
Steve | Update | safety | scope battery recall | Tektronix RECALL
on TDS3000 or TDS300B oscilloscope |
|
|
9983
|
Wed May 21 13:20:34 2014 |
manasa | Update | LSC | ALS X noise from angular motion of mirrors |
|
|
|
9982
|
Wed May 21 13:18:47 2014 |
ericq | Update | CDS | Suspension MEDM Bug | I fixed a bug in the SUS_SINGLE screen,
where the total YAW output was incorrectly
displayed (TO_COIL_3_1 instead of TO_COIL_1_3). |
|
|
9981
|
Wed May 21 11:11:01 2014 |
manasa | Update | IOO | MC tuned | I found MC unlocked this morning. I looked
at the 2 day trend of the MC suspensions
and found MC2 suspensions have been misaligned. |
|
|
9980
|
Wed May 21 09:35:33 2014 |
Steve | Update | SUS | razor beam dumps ETMX_ISCT |
|
|
|
9979
|
Wed May 21 05:05:39 2014 |
Jenne | Update | LSC | REFL 165 vs 33 investigations | [Rana, Jenne]
We spent some time tonight looking
at locking the PRMI with REFL165 vs. REFL33, |
|
|
9978
|
Wed May 21 00:18:40 2014 |
Jenne | Update | LSC | PRMI locked with REFL33 vs. REFL165 | Since Q has found that REFL165 will be
better for holding the PRMI while we reduce
the CARM offset, I had a look at locking |
|
|
9977
|
Tue May 20 22:42:28 2014 |
ericq | Update | LSC | 3f Stability | Here's the angles of MICH and PRCL
from the my earlier plot by themselves; this
shows that the individual demod angles in |
|
|
9976
|
Tue May 20 16:48:52 2014 |
ericq | Update | LSC | 3f Stability | So, I really should have done this as soon
as Manasa
measured the arm lengths... I've |
|
|
9975
|
Tue May 20 15:54:39 2014 |
rana | Summary | SUS | ETMX oplev qpd board | This QPD circuit (D980325-C1 )
uses the nice OP497 Quad FET opamp as the
transimpedance amplifier. It has a low enough |
|
|
9974
|
Tue May 20 11:48:22 2014 |
Steve | Update | SUS | beam dumps added to ETMX_ISCT | Anodized aluminum dumps replaced by 6 razor
beam dumps.
Two more razor beam dumps added this |
|
|
9973
|
Tue May 20 09:12:25 2014 |
Steve | Summary | SUS | ETMX oplev qpd board |
|
|
|
9972
|
Tue May 20 02:12:35 2014 |
Jenne | Update | LSC | ALS X noise investigation | [Rana, Jenne]
We
have looked at a few things that do and don't |
|
|
9971
|
Mon May 19 22:44:21 2014 |
den | Update | PEM | xend sei isolation kit is set |
|
|
|
9970
|
Mon May 19 09:19:44 2014 |
Steve | Update | LSC | happy IFO | 15 hours |
|
|
9969
|
Sun May 18 17:57:54 2014 |
rana | Update | LSC | ETMX transients due to unseated bias cable | The daytime crew had noticed that
there were some ETMX angular shifts happening
without any control or intention. |
|
|
9968
|
Sun May 18 14:36:04 2014 |
den | Update | LSC | offsets in 3f and drmi stable lock on 1f | Eric, Den
We noticed that PRMI RIN is high
when the cavity is locked on RELF33 I&Q |
|
|
9967
|
Sat May 17 14:48:06 2014 |
den | Update | PEM | yend sei isolation kit is set | Yend seismometer isolation kit (elog
8461) hosts Guralp seismometer. I made
a cable for inside connection, assembled |
|
|
9966
|
Fri May 16 20:55:18 2014 |
Jamie | Frogs | lore | un-full-screening Ubuntu windows with F11 | Last week Rana and I struggled to figure
out how to un-full-screen windows on the
Ubuntu workstations that appeared to be stuck |
|
|
9965
|
Fri May 16 16:08:12 2014 |
steve | Update | LSC | Isolating base plates | Electronic components should be ISOLATED
as they are installed on the optical tables.
This is essential to avoid ground |
|
|
9964
|
Fri May 16 11:22:23 2014 |
Steve | Update | LSC | X Arm ALS Noise coming in and out |
|
|
|
9963
|
Fri May 16 10:54:42 2014 |
ericq | Update | LSC | X Arm ALS Noise coming in and out | Den and I spent some time with the interferometer
last night with hopes of bringing in the
AO path, but were stymied by the (re)occurrence |
|
|
9962
|
Fri May 16 10:48:32 2014 |
Steve | Update | LSC | Y arm T- qpd is getting light guard extension tube | The qpd was removed from the east end table
and threaded adaptor ring epoxied on it's
shell. |
|
|
9961
|
Fri May 16 09:46:05 2014 |
Steve | Update | PSL | pointing monitoring |
|
|
|
9960
|
Fri May 16 00:25:53 2014 |
rana | Update | PSL | PMC realign | Tonight I noticed that the drop in
PMC transmission was ~1V, more than the usual
of ~0.5V from the daily drift. |
|
|
9959
|
Thu May 15 16:46:35 2014 |
ericq | Update | LSC | Possible Path to AO path | It's taken a lot of trial and error,
but I've found a path through MATLAB loops
that seems like it may be stable |
|
|
9958
|
Thu May 15 15:10:02 2014 |
Steve | Update | PEM | seismic activities | Our only seismometer is at the east end
now.
Atm1, Ditch Day morning puzzle. The |
|
|
9957
|
Thu May 15 02:52:51 2014 |
Jenne | Update | LSC | Started engaging the AO path, not getting all the way yet |
In addition to a transparent
legend, we need the corresponding CM crossover |
|
|
9956
|
Thu May 15 02:32:01 2014 |
Jenne | Update | LSC | Started engaging the AO path, not getting all the way yet | I tried many times this evening to engage
the AO path, with limited success.
Q's new scripts worked really well, |
|
|
9955
|
Thu May 15 01:42:07 2014 |
rana | Update | CDS | /frames space cleared up, daqd stabilized | Script seems to be working now:
nodus:~>df -h | grep
frames |
|
|
9954
|
Wed May 14 17:36:32 2014 |
ericq | Update | CDS | New netgpib scripts for SR785 | I have redone the SPSR785 (spectrum measurement) |
|
|
9953
|
Wed May 14 14:39:31 2014 |
Jenne | Update | SUS | New buttons on IFO_ALIGN screen | It's starting to get a little crowded,
but I modified the IFO_ALIGN screen to have
new buttons to show the aligned / misaligned |
|
|
9952
|
Wed May 14 10:04:06 2014 |
Steve | Summary | SUS | oplev laser and temperature | ETMX oplev qpd gain has to be increased.
|
|
|
9951
|
Wed May 14 02:37:58 2014 |
Jenne | Update | LSC | No big locking news | Tonight was mostly cleaning up some scripts,
including the re-writing the restore and
align scripts for the optics. |
|
|
9950
|
Tue May 13 22:55:57 2014 |
Jenne | Summary | SUS | ETMX oplev: cleanup | I believe that the Xend aux laser was turned
off earlier today, for Steve's work swapping
out the oplev. When I went down there, |
|
|
9949
|
Tue May 13 17:45:21 2014 |
rana | Update | CDS | /frames space cleared up, daqd stabilized |
Late last night we were getting
some problems with DAQD again. Turned out |
|
|
9948
|
Tue May 13 17:31:32 2014 |
Jenne | Summary | SUS | ETMX oplev laser replaced: New oplev gains set | I took loop measurements of ETMX pit and
yaw, and set the upper UGF to be ~6Hz for
both. This required a pitch gain of |
|
|
9947
|
Tue May 13 17:03:05 2014 |
Steve | Summary | SUS | ETMX oplev laser replaced |
|
|
|
9946
|
Tue May 13 13:27:58 2014 |
Steve | Summary | SUS | Optical Lever Servos setting table |
|
|