| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
6942
|
Mon Jul 9 05:15:46 2012 |
yuta | Update | Green Locking | locked MI while ALS using ASDC | I locked MI while both arm length are stabilized
at IR resonance. This could be done using
DC READOUT, |
|
|
6941
|
Mon Jul 9 05:02:58 2012 |
yuta | Update | Locking | adjusted ALS filters, current RMS | I adjusted filters of ALS to give more
phase margin.
RMS |
|
|
6940
|
Sun Jul 8 19:31:53 2012 |
yuta | Update | Locking | characterizing LSC arm lock by ALS error signal | RMS
of X/Y arm length using POX/POY lock is <160
pm and <120 pm respectively. |
|
|
6939
|
Sun Jul 8 00:58:08 2012 |
Koji | Summary | Locking | calibrating phase tracking mode scan data |
|
|
|
6938
|
Sun Jul 8 00:27:54 2012 |
yuta | Summary | Locking | calibrating phase tracking mode scan data | FSR
for X/Y arm are 3.97 +/- 0.03 MHz and 3.96
+/- 0.02 MHz respectively. This |
|
|
6936
|
Sat Jul 7 17:28:11 2012 |
Masha | Update | PEM | PEM no longer freaking out (as much). |
|
|
|
6935
|
Sat Jul 7 16:34:41 2012 |
Masha | Update | PEM | PEM no longer freaking out (as much). | Hi everybody,
Sorry for flooding the ELOG about
the PEM channels. Today I |
|
|
6934
|
Sat Jul 7 15:48:00 2012 |
Masha | Update | PEM | Current PEM status |
|
|
|
6933
|
Fri Jul 6 22:30:14 2012 |
Masha | Update | PEM | Current PEM status |
|
|
|
6932
|
Fri Jul 6 20:54:54 2012 |
Masha | Update | PEM | Current PEM status | Hi everybody,
Last night I (with the help of Jenne
and Jenne's advice - not to implicate her |
|
|
6931
|
Fri Jul 6 14:10:31 2012 |
yuta | Summary | LSC | calculation of FPMI using ALS | From calculation, phase fluctuation of
reflected beam from length stabilized arm
is not disturbing MI lock. |
|
|
6930
|
Fri Jul 6 09:52:35 2012 |
steve | Update | VAC | pump down hick up | I can not understand what really
happened here with CC1 gauge or there was
really a pressure glitch. |
|
|
6929
|
Fri Jul 6 09:27:40 2012 |
steve | Update | VAC | 4 days at atm | I'm looking for some movement indicators
of the vent-pump down events.
|
|
|
6928
|
Fri Jul 6 09:00:34 2012 |
not Zach | Update | Computers | NDS2 client now working on Ubuntu machines |
|
|
|
6927
|
Fri Jul 6 08:38:04 2012 |
steve | Update | Computers | time out | Why do we have these timing blanks? |
|
|
6926
|
Fri Jul 6 02:46:03 2012 |
yuta | Update | Locking | Y arm ALS handing off to LSC | Handing off the servo from ALS to LSC for
one arm is quite easy because servo filters
are pretty much same for ALS and LSC. I demonstrated |
|
|
6925
|
Fri Jul 6 01:39:56 2012 |
yuta | Update | Locking | MI + Y arm ALS succeed, but not both | MI with X arm length stabilized off resonance
and Y arm length stabilized at resonance
using ALS succeed, but I couldn't bring X |
|
|
6924
|
Fri Jul 6 01:12:02 2012 |
Jenne | Update | Computers | c1sus is fine |
|
|
|
6923
|
Thu Jul 5 16:49:35 2012 |
Jenne | Update | Computers | c1sus is funny | I was trying to use a new BLRMs c-code
block that the seismic people developed,
instead of Mirko's more clunky version, but |
|
|
6922
|
Thu Jul 5 13:38:05 2012 |
yuta | Summary | Locking | cavity g-factor from mode scan | Cavity
g-factor for X arm is 0.3737 +/- 0.002, Y
arm is 0.3765 +/- 0.003. |
|
|
6921
|
Thu Jul 5 13:12:12 2012 |
Zach | Update | Computers | NDS2 client now working on Ubuntu machines | From my conversations with JZ and Leo,
it seemed there was no package that generated
the appropriate mex files. It was clear that |
|
|
6920
|
Thu Jul 5 12:27:05 2012 |
Jamie | Update | CDS | front-end/fb communication lost, likely again due to timing offsets |
|
|
|
6919
|
Thu Jul 5 12:06:35 2012 |
Jamie | Update | Computers | NDS2 client now working on Ubuntu machines |
|
|
|
6918
|
Thu Jul 5 11:12:53 2012 |
Jenne | Update | CDS | front-end/fb communication lost, likely again due to timing offsets |
|
|
|
6917
|
Thu Jul 5 10:49:38 2012 |
Jamie | Update | CDS | front-end/fb communication lost, likely again due to timing offsets | All the front-ends are showing 0x4000 status
and have lost communication with the frame
builder. It looks like the timing skew |
|
|
6916
|
Thu Jul 5 01:34:11 2012 |
yuta | Update | Locking | MI with X arm ALS | I tried to lock FPMI using ALS, but I could
not take care of ALS for both arms + MI.
So, I decided to try one arm + MI. |
|
|
6915
|
Thu Jul 5 01:20:58 2012 |
yuta | Summary | CDS | slow computers, 0x4000 for all DAQ status | ALS looks OK. I tried to lock FPMI using
ALS, but I feel like I need 6 hands to do
it with current ALS stability. Now I have |
|
|
6914
|
Wed Jul 4 21:11:53 2012 |
yuta | Update | Locking | FPMI in vacuum is back | I aligned FPMI and greens. There's no recognizable
difference between before and after the vent.
|
|
|
6913
|
Wed Jul 4 20:13:46 2012 |
yuta | Bureaucracy | Locking | PRC commissioning plan | Issues in PRC:
1. Power recycling gain is
too low (~ 15 instead of 40, according to |
|
|
6912
|
Wed Jul 4 18:25:44 2012 |
Zach | Update | Computers | NDS2 client now working on Ubuntu machines | After plenty of work, NDS2 can now |
|
|
6911
|
Wed Jul 4 17:33:04 2012 |
Jamie | Update | CDS | timing, possibly leap second, brought down CDS | I got a call from Koji and Yuta that something
was wrong with the CDS system. I somehow
had an immediate suspicion that it had something |
|
|
6910
|
Tue Jul 3 20:51:06 2012 |
yuta | Update | IOO | MC in vacuum is back | MC came back to the state as it was before
the vent.
|
|
|
6909
|
Tue Jul 3 19:04:59 2012 |
Jamie | Update | Green Locking | Laseroptik dichroic optics received | I put them in the "visible optics"
drawer of the newish, metal optics cabinet
with the thin drawers down the Y arm. |
|
|
6908
|
Tue Jul 3 18:58:14 2012 |
Yaakov | Update | STACIS | More transfer functions and netGPIB status | I'm still having issues with the STACIS
oscillating uncontrollably with the slightest
extra vibration, but with some more added |
|
|
6907
|
Tue Jul 3 17:56:35 2012 |
Jamie | Update | Green Locking | Laseroptik dichroic optics received | We have received the dichroic optics from
Laseroptik. The coatings are:
HR: |
|
|
6906
|
Tue Jul 3 17:23:50 2012 |
steve | Update | VAC | pumpdown completed | Vacuum Normal State is reached in 9 hours.
CC1 = 2e-5 Torr
Aux dry pump #3 is still running. |
|
|
6905
|
Mon Jul 2 23:08:38 2012 |
Yaakov | Update | STACIS | Turning on STACIS | This past Friday I swapped out a burnt
resistor on the spare STACIS unit I'm working
with and powered it up. Here's the setup: |
|
|
6904
|
Mon Jul 2 18:28:09 2012 |
Jenne | Update | Photos | Many photos taken | Many photos were taken by many different
people....most of the fuzzy ones are by yours
truely (doing a reach-around to get to hard-to-reach |
|
|
6903
|
Mon Jul 2 18:27:25 2012 |
yuta | Update | General | BS and ITMX chambers closed | [Koji, Steve, Jamie, Jenne, Yuta]
We opened BS and ITMX chambers, took |
|
|
6902
|
Mon Jul 2 10:45:25 2012 |
Jenne | Summary | General | clipping at BS |
|
|
|
6901
|
Mon Jul 2 00:41:13 2012 |
rana | Summary | General | clipping at BS, my plan |
Start pumping on Monday before
Steve goes home. |
|
|
6900
|
Sun Jul 1 23:48:15 2012 |
yuta | Summary | General | clipping at BS, my plan | [Koji, Yuta]
We aligned PRMI and inspected BS chamber. |
|
|
6899
|
Sun Jul 1 13:20:09 2012 |
yuta | Update | IOO | MC in low power | I modified autolocker for MC in low power
mode (/opt/rtcds/caltech/c1/scripts/MC/autolockMCmain40m_low_power)
to make it work with the current directory |
|
|
6898
|
Sat Jun 30 18:31:38 2012 |
steve | Update | IOO | input telescope beam clipping on Faraday | We could set up a simple pick
off after the Faraday and bring it
out the north window of IOO chamber. No monitor |
|
|
6897
|
Fri Jun 29 22:56:35 2012 |
Jamie | Update | VAC | input telescope beam clipping on Faraday | [Yuta, Koji, Jamie]
We went into ITMX chamber to inspect
the situation there. We looked for |
|
|
6896
|
Fri Jun 29 16:41:41 2012 |
yuta | Update | General | PRM was NOT installed backwards | [Koji, Steve, Jamie, Yuta]
So, PRM was NOT flipped...... |
|
|
6895
|
Fri Jun 29 13:11:31 2012 |
steve | Update | VAC | 40m IFO at atm | The 4 hrs vent plot at 3 torr/min
rate.
Nitrogen was used from 1e-6 torr |
|
|
6894
|
Fri Jun 29 11:02:00 2012 |
steve | Update | VAC | the vent is at 500 torr |
|
|
|
6893
|
Fri Jun 29 03:21:32 2012 |
yuta | Update | General | prep for the vent - others | 1. Turned off high voltage power supplies
for PZT1/2 (input PZTs) and OMC stage 1/2.
They live in 1Y3 rack and AUX_OMC_NORTH rack. |
|
|
6892
|
Fri Jun 29 02:17:40 2012 |
yuta | Update | IOO | prep for the vent - beam attenuating | [Koji, Jamie, Yuta]
We attenuated the incident beam (1.2 |
|