ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
8634
|
Thu May 23 20:58:49 2013 |
Jenne | Update | PEM | PRM, ITMX optics tripped, restored |
M5.7
- 11km WNW of Greenville, California
Time2013-05-23 |
|
8752
|
Wed Jun 26 01:30:31 2013 |
rana | Summary | PEM | Variation in 10-30 Hz seismic RMS | For quite a while (no one knows how long),
we've seen fluctuations in the 10-30 Hz seismic
motion. This shows up as the purple trace |
 |
8764
|
Thu Jun 27 15:50:03 2013 |
Jenne | Update | PEM | BLRMS are going crazy | The BLRMS are totally crazy today!
I'm not sure what the story is, since it's
been this way all day (so it's not an earthquake, |
  |
8765
|
Thu Jun 27 15:58:27 2013 |
Steve | Update | PEM | PSL enclosure particle counts |
Particle counts were measured
inside the PSL enclosure at 40VAC variac |
|
8773
|
Thu Jun 27 21:45:48 2013 |
rana | Update | PEM | BLRMS are going crazy | Its an increase in the microseismic peak.
Don't know what its due to though. |
|
8856
|
Tue Jul 16 13:48:26 2013 |
Steve | Update | PEM | cranes cleaned | Keven and Steve,
The 3 cranes tested and wiped
off as preparation for upcoming vent. |
|
8925
|
Thu Jul 25 14:45:06 2013 |
rana | Update | PEM | Guralp specgram with ligoDV and NDS2 | Once you install a matlab newer than
2012a, you can install ligoDV as a matlab
app and get the NDS2 client software for |
|
8954
|
Thu Aug 1 16:33:39 2013 |
Sujan | Update | PEM | Guralp2 seismometer installed at North side of POX table | 1)Power to the seismometers were turned
down,
2)Guralp2 was moved to North side |
|
8987
|
Thu Aug 8 18:43:12 2013 |
Sujan | Summary | PEM | Optimally subtracting signals from two seismometers. | An exercise of optimally subtracting one
seismometer signal by another using weiner
filters was done. Results have been summarized |
|
8988
|
Thu Aug 8 18:47:41 2013 |
Sujan | Summary | PEM | Using weiner filters for subtracting signals MC_L and GUR2_X | I used MC_L signal from the Mode Cleaner
as the desired signal with GUR2_X as witness
signals. I observed good subtraction where |
|
9003
|
Tue Aug 13 11:04:44 2013 |
Steve | Update | PEM | fluorecent lights | Our fluorecent
lights became obsolete. We'll have
change fixtures over to some more energy |
|
9098
|
Tue Sep 3 14:23:21 2013 |
Steve | Update | PEM | earthquakes | ~Vancuver, Canada earthquakes: magnitude
6, 5 and more shaking
|
|
9140
|
Thu Sep 19 10:24:58 2013 |
Steve | Update | PEM | PRM damping restored after earth quake | Local m3.8
eq shakes PRM lose. |
|
9154
|
Sun Sep 22 23:04:52 2013 |
rana | Update | PEM | Guralp needs recentering | After seeing all of these spikes
in the BLRMS at high frequency for awhile,
I power cycled the Guralp interface box (@ |
|
9180
|
Tue Oct 1 10:06:27 2013 |
Steve | Update | PEM | particle counts | How can we improve the |
 |
9181
|
Tue Oct 1 11:24:02 2013 |
rana | Update | PEM | particle counts | Probably more important is to establish
quantitatively how particle counts affects
the lock acquisition or noise in the interferometer. |
|
9192
|
Thu Oct 3 02:46:58 2013 |
rana | Metaphysics | PEM | USGS Furlough | |
|
9221
|
Tue Oct 8 11:29:30 2013 |
Steve | Update | PEM | no Janitor day today | This was the second week without wet mopping
the floor and wet wipe down of the vacuum
envelope. |
|
9224
|
Wed Oct 9 15:00:48 2013 |
Steve | Update | PEM | freshmen tour | [Alan, Koji, Manasa]
Record number of 50 freshmen were
given tour of the 40m this afternoon. |
|
9253
|
Fri Oct 18 08:12:08 2013 |
Steve | Update | PEM | 1000 days trends | |
|
9254
|
Fri Oct 18 15:18:49 2013 |
Steve | Update | PEM | particle count peak or ... | Sunday evening fireworks. Manasa heard
it. |
 |
9257
|
Tue Oct 22 10:12:33 2013 |
Steve | Update | PEM | south arm AC intake duct checked | The 4th week of no wet mopping
of the floor and no wet wiping
the vacuum envelope. |
  |
9269
|
Wed Oct 23 19:14:10 2013 |
Jenne | Update | PEM | Seismometer status | As you may recall, Den designed some nice
seismometer stations for us with the help
of Steve. The granite base was installed |
|
9300
|
Sun Oct 27 19:19:42 2013 |
Den | Update | PEM | Seismometer status |
|
 |
9301
|
Sun Oct 27 23:26:44 2013 |
rana | Update | PEM | Seismometer status | It would be nice if we could use
the existing seismometer cable and place
a 2-terminal temperature sensor within the |
|
9369
|
Tue Nov 12 23:05:06 2013 |
rana | Update | PEM | thump noise from particle counter | [quote]The particle counter is back on the
IOOC location on a piece of FOAM
It needs this isolation, so when the pump |
|
9374
|
Wed Nov 13 11:30:07 2013 |
Steve | Update | PEM | particle counter MOVED | Particle counter moved from the top of IOOC
to the east wall |
|
9489
|
Wed Dec 18 15:35:48 2013 |
Steve | Update | PEM | excess seismic noise | This is not a test. Life can be dangerous
in the 40m Control Room. |
|
9556
|
Wed Jan 15 13:05:30 2014 |
Jenne | Update | PEM | 4.4 EQ in Fontana, CA | It looks like there was a 4.4 magnitude
earthquake near Fontana, CA around 1:30am
today. This tripped all of the suspension |
|
9559
|
Thu Jan 16 08:19:29 2014 |
Steve | Update | PEM | 4.4 and 3.8M local earth quakes |
|
 |
9591
|
Mon Feb 3 10:17:14 2014 |
Steve | Update | PEM | dusty surfaces | Please wet WIPE |
   |
9623
|
Tue Feb 11 16:49:36 2014 |
Steve | Update | PEM | floor cleaning | Keven, Steve
The floor was cleaned under the east |
|
9643
|
Tue Feb 18 10:10:07 2014 |
Steve | Update | PEM | floor cleaning under racks |
|
|
9675
|
Tue Feb 25 23:38:05 2014 |
rana, jenne | Update | PEM | GUR1 Z channel excess noise: oscillating Z channel | Last night we noticed an excess in the
GUR1Z seis BLRMS on the StripTool. It was
in the 0.1 - 0.3 Hz band. The rumor in the |
|
9689
|
Tue Mar 4 17:07:27 2014 |
Steve | Update | PEM | floor cleaning under racks |
|
|
9743
|
Fri Mar 21 14:59:44 2014 |
steve | Update | PEM | controling dust | Please take a look at the table top with
the flashlight before |
|
9771
|
Tue Apr 1 20:56:27 2014 |
Jenne | Update | PEM | No noticeable effect from Chile's M8.2 earthquake | Koji locked the MC, arms, and PRMI, with
no troubles, after the M8.2 earthquake off
the coast of Chile, that happened about 4 |
|
9775
|
Wed Apr 2 09:31:22 2014 |
Steve | Update | PEM | local 3.0M earthquake |
|
 |
9778
|
Wed Apr 2 20:13:04 2014 |
Jenne | Update | PEM | More Chile EQs | 2 more earthquakes in Chile: a M6.4
and a M7.8.
We got them about 15 minutes ago |
|
9808
|
Mon Apr 14 17:59:05 2014 |
Jenne | Configuration | PEM | New T-240 cable | As payment for borrowing 2 of our seismometers,
Zach has made us a new Trillium cable, to
go from the granite station to the readout |
|
9914
|
Tue May 6 09:46:50 2014 |
steve | Update | PEM | cleaning day | Keven and Steve,
We cleaned around the Vertex chambers,
PSL and MC2 floor areas. |
|
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 |
  |
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 |
 |
9971
|
Mon May 19 22:44:21 2014 |
den | Update | PEM | xend sei isolation kit is set |
|
|
10003
|
Thu May 29 08:43:34 2014 |
manasa | Update | PEM | Ant season already in | Ant season has set in. I spotted and killed
a few ants around the optics |
|
10023
|
Wed Jun 11 08:57:49 2014 |
Steve | Update | PEM | air cond maintenance tomorrow morning |
|
|
10075
|
Thu Jun 19 17:11:52 2014 |
steve | Update | PEM | it is warmer today | The PSL HEPA was running at 30VAC-variac.
It is 1 degree C warmer than usual. The HEPA
fan motor turned up to 60 V |
|
10119
|
Wed Jul 2 11:32:44 2014 |
Jenne, TaraV | Update | PEM | Status of seismometer stations, Yend Guralp moved | [Jenne, TaraV]
We had a look this morning at
the status of the seismometer array, so that |
|
10141
|
Mon Jul 7 16:39:26 2014 |
Steve | Update | PEM | ants on the PSL table |
|
|
10368
|
Tue Aug 12 13:31:58 2014 |
Jenne | Update | PEM | Seismometer cables in place, ready for sensors | [TaraV, Jenne]
The short cable from the slab to
the sensor has been assembled and installed |
|