| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
6264
|
Thu Feb 9 17:11:05 2012 |
steve | Update | SUS | more OSEM problems | These observations of the OSEMs were
taken while taking transfer functions of
oplev YAW at excitation amplitude 0.1 |
|
|
6266
|
Fri Feb 10 02:35:29 2012 |
kiwamu | Update | IOO | crazy ground motion | I
gave up tonight's locking activity because
the MC can't stay locked. |
|
|
6267
|
Fri Feb 10 02:43:37 2012 |
Zach | Update | SUS | OSEM LED driver noise *reduced* | I worked on the OSEM box a little more
today, with the hopes of reducing the measured
output current noise. |
|
|
6268
|
Fri Feb 10 11:01:31 2012 |
steve | Update | IOO | crazy ground motion |
|
|
|
6269
|
Fri Feb 10 11:46:44 2012 |
steve | Update | IOO | seismic noise back to normal | The shaking has stopped at 9:32am
The AC was turned back on at 11:30am
We still do not have any explanation |
|
|
6270
|
Fri Feb 10 15:46:59 2012 |
steve | Update | SUS | ruby wire standoff | Finally I found a company who can do Koji's
improved -hard to make- specification
on ruby or sapphire wire standoff. |
|
|
6271
|
Fri Feb 10 15:47:38 2012 |
rana | Update | PEM | seismic noise back to normal |
Kiwamu and Steve maybe don't
know about how to trend seismic noise. If |
|
|
6272
|
Fri Feb 10 15:52:35 2012 |
Jenne | Update | PEM | seismic BLRMS loud too |
|
|
|
6273
|
Fri Feb 10 15:54:27 2012 |
steve | Update | PEM | AC turned back ON | The air cond was off for 2 hrs. I
just switched it back on at 15:51 |
|
|
6274
|
Fri Feb 10 23:19:09 2012 |
kiwamu | Update | IOO | cross talk causing fake seimometer signals | [ Koji / Kiwamu ]
The |
|
|
6275
|
Fri Feb 10 23:58:30 2012 |
rana | Update | PEM | seismic BLRMS loud too |
|
|
|
6276
|
Mon Feb 13 11:30:51 2012 |
Jenne | Update | PEM | seismic BLRMS loud too |
|
|
|
6277
|
Mon Feb 13 12:02:17 2012 |
Koji | Update | PEM | seismic BLRMS loud too | I reported the procedure to add slow channels
to the FB. I guess you already have done
Step.1 |
|
|
6278
|
Tue Feb 14 08:22:27 2012 |
steve | Update | SUS | sus damping restored | ITMX, PRM and BS watchdogs are tripped.
They were restored.
Stable MC was disabled so I can use |
|
|
6279
|
Tue Feb 14 15:52:11 2012 |
Jenne | Update | Auxiliary locking | Yarm fiber returned to ATF | [Frank, Jenne]
We extracted the fiber that Suresh
and Sonali laid over the summer, for the |
|
|
6280
|
Tue Feb 14 17:09:05 2012 |
steve | Update | General | reflectivity of green welding glass | Schott, Athermal green welding glass,
shade #14 reflectivity was measured in 1.2W,
~1 mm diameter beam of MC reflected. |
|
|
6281
|
Wed Feb 15 05:29:22 2012 |
kiwamu | Update | LSC | sensing matrix of PRMI | I have measured the sensing matrix of PRMI.
It
seems that the MICH signal in the 3f ports |
|
|
6282
|
Wed Feb 15 11:34:01 2012 |
steve | Update | | under the shouth end optical table | I added an U channel based bottom shelf
at the south end today. |
|
|
6283
|
Wed Feb 15 17:15:33 2012 |
kiwamu | Update | LSC | sensing matrix of PRMI | I
think I have told a lie in the last meeting
-- the measured sensing matrix doesn't look |
|
|
6284
|
Thu Feb 16 03:47:16 2012 |
kiwamu | Update | LSC | glitch table | I updated the table which I posted some
time ago (#6231).
The latest table is shown below. |
|
|
6285
|
Thu Feb 16 04:02:16 2012 |
kiwamu | Update | LSC | insane REFL165 DC output | I
found that the DC monitor of the REFL165
was showing 9 V regardless of how much laser |
|
|
6286
|
Thu Feb 16 04:29:30 2012 |
kiwamu | Update | LSC | upconversion noise from BS motion | Sometimes ago I reported that there
have been a kind of upconversion noise when
PRM was excited (#6211). |
|
|
6287
|
Thu Feb 16 07:38:24 2012 |
Koji | Update | LSC | sensing matrix of PRMI | So why don't you use AS55I and Q for the
control of PRMI??? |
|
|
6288
|
Thu Feb 16 09:59:16 2012 |
steve | Update | ASC | IP- ANG | Initial pointing or IP-ANG is a pointing
monitor of the MC. This beam is launched
after the second pzt steering |
|
|
6289
|
Thu Feb 16 13:12:30 2012 |
rana | Update | LSC | sensing matrix of PRMI |
|
|
|
6290
|
Thu Feb 16 21:13:07 2012 |
Suresh | Update | Electronics | REFL165 repair: PD replaced, DC response checked with a torch light | [Koji, Suresh]
Kiwamu mentioned that REFL165 is
not responding and its DC out seems saturated |
|
|
6291
|
Thu Feb 16 23:12:55 2012 |
kiwamu | Update | IOO | MC unlocking frequently | The
MC became crazy again.
It seems that there were corresponding |
|
|
6292
|
Fri Feb 17 01:02:22 2012 |
kiwamu | Update | IOO | MC is back to normal | [Koji / Kiwamu]
The
MC is now back to normal. The beam pointing |
|
|
6293
|
Fri Feb 17 04:45:48 2012 |
kiwamu | Update | LSC | sensing matrix of PRMI | I
locked the PRMI with the AS55I and Q combination.
|
|
|
6294
|
Sat Feb 18 12:23:09 2012 |
Den | Update | IOO | MC | When I came to the 40m this afternoon,
the MC was unlocked. Here is the trend of
MC_F for last 2 hours |
|
|
6295
|
Sat Feb 18 16:58:59 2012 |
kiwamu | Update | IOO | MC suspension realigned | [ Den / Kiwamu]
We
have realigned the MC suspensions so that |
|
|
6296
|
Sat Feb 18 17:01:26 2012 |
Den | Update | Adaptive Filtering | static variables | In order to prevent different DOF from
redetermining static variables in the adaptive
code, I've created a separate code for each |
|
|
6297
|
Sat Feb 18 18:29:38 2012 |
Den | Update | Adaptive Filtering | online filtering | I tried to filter MC_F from seismic noise
measured by GUR1 seismometer. I've used 8000
tap filter, downsample ratio=8, delay=1. |
|
|
6298
|
Tue Feb 21 04:30:02 2012 |
kiwamu | Update | LSC | Y arm + PRMI | I
tried the "Yarm + PRMI" configuration
to see what happens. |
|
|
6299
|
Tue Feb 21 08:33:16 2012 |
steve | Update | Green Locking | periscope adapter plate | Two extender plates ready for cleaning.
The existing optical table tops have 38"
OD. Using two of these the OD will be 44" |
|
|
6300
|
Tue Feb 21 16:10:29 2012 |
kiwamu | Update | IOO | degradation in input PZT1 | PZT1,
the one with Koji's custom mid-HV driver
(#5447 |
|
|
6301
|
Tue Feb 21 18:39:11 2012 |
kiwamu | Update | Green Locking | New BBPDs installed | Two new BBPDs have been installed on
the PSL table.
The first one was installed by Koji |
|
|
6302
|
Tue Feb 21 22:06:18 2012 |
jamie | Update | LSC | beatbox DFD installed in 1X2 rack | I have installed a proto version of the
ALS
beatbox delay-line frequency discriminator |
|
|
6303
|
Wed Feb 22 01:53:57 2012 |
kiwamu | Update | LSC | update on glitch table | I
tried SRMI. The glitch rate wasn't as high
as that of PRMI but it happened once per |
|
|
6304
|
Wed Feb 22 13:28:22 2012 |
kiwamu | Update | LSC | Y arm + central part locking | Last night I tried the "Y
arm + central part" locking again. Three |
|
|
6305
|
Wed Feb 22 16:55:16 2012 |
Jamie | Update | SUS | wacky state of SUS input matrices | While Kiwamu and I were trying to investigate
the the vertex
glitches we were noticing excess noise |
|
|
6306
|
Wed Feb 22 19:45:33 2012 |
kiwamu | Update | LSC | how much length offset do we need ? | I
did a quick calculation to see if the offset
of the arm length which I tried last night |
|
|
6307
|
Thu Feb 23 02:20:07 2012 |
Zach | Update | SUS | wacky state of SUS input matrices | This reminds me that the whole Dr. SUS
situation never got taken care of. Where |
|
|
6308
|
Thu Feb 23 09:09:33 2012 |
steve | Update | SAFETY | safety checks | Emergency exit lights were inspected:
2 out of 13 batteries have to be replaced
One of the Halon fire extinguishers |
|
|
6309
|
Thu Feb 23 10:53:54 2012 |
steve | Update | SUS | oplev PIT transfer functions | Oplev transfer functions PIT UGF
were optimized to be at 2-3 Hz with 60 degree
minimum phase margin by adjuting oplev gains. |
|
|
6310
|
Fri Feb 24 03:58:13 2012 |
kiwamu | Update | LSC | Y arm + PRMI part II | I tried the Yarm + PRMI configuration
again.
|
|
|
6311
|
Fri Feb 24 04:12:44 2012 |
kiwamu | Update | SUS | freeswing test | The following optics were kicked:
MC1
MC2 MC3 ETMX ETMY ITMX ITMY PRM SRM BS
Fri
Feb 24 04:11:15 PST 2012
1014120690
|
|
|
6312
|
Fri Feb 24 08:06:52 2012 |
steve | Update | SUS | sus restored |
|
|
|
6313
|
Fri Feb 24 15:01:31 2012 |
kiwamu | Update | LSC | Y arm + PRMI part II | The figure below shows the time series
of the Y arm + PRMI trail.
|
|
|
6314
|
Fri Feb 24 16:10:48 2012 |
mike | Update | Computers | PyNDS and a Plot | Power Spectral Density plot using PyNDS,
comparing 5 fast data channels for ETMX.
**EDIT** Script here: |
|