ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10262
|
Wed Jul 23 11:32:04 2014 |
Koji | Update | LSC | IFO warming up | Alone with the IFO. Started from some conversation
with it.
Some ALS trials: Found the Y-end |
|
|
10263
|
Wed Jul 23 11:54:27 2014 |
Nichin | Update | Electronics | Characterization of demodulator boards. |
|
|
|
10264
|
Wed Jul 23 17:54:51 2014 |
Harry | Update | General | Coupling Improvements plus PER Measurement Setup | Purpose
We wanted to improve the coupling
into the fibers, because it's very rarely |
|
|
10265
|
Wed Jul 23 18:53:11 2014 |
Nichin | Update | Electronics | Time delay in RG405 coaxial cables | A time delay can be modeled
as the exponential transfer function : e(-sTd) |
|
|
10266
|
Wed Jul 23 19:30:34 2014 |
Nichin | Update | Electronics | Time delay in the RF multiplexer (Rack 1Y1) | A time
delay can be modeled as the exponential
transfer function : |
|
|
10267
|
Wed Jul 23 23:43:28 2014 |
ericq | Update | LSC | Locking efforts; Wrath of the Mode Cleaner | [Koji, ericq]
We were working on getting back into
the locking groove tonight. |
|
|
10268
|
Thu Jul 24 09:18:15 2014 |
Steve | Update | General | four days | |
|
|
10269
|
Thu Jul 24 13:01:39 2014 |
ericq | Update | SUS | PRM OPLEV! | Here's a fun fact: since
the great computer failure of June2014, the
PRM Oplev gains have been ZERO.
|
|
|
10270
|
Thu Jul 24 14:20:30 2014 |
Steve | Update | SUS | PRM & other oplev gain settings checked | The PRM sus gains checked OK
All other suspension oplev gains
setting were checked out OK |
|
|
10271
|
Thu Jul 24 17:37:19 2014 |
Harry | Update | General | Coupling Improvements plus PER Measurement Setup |
|
|
|
10272
|
Thu Jul 24 19:28:43 2014 |
Akhil | Update | General | Thermal Actuator Transfer Functions | As a part of temperature actuator
characterization, today Eric Q and I made
some measurements for the open loop TF of |
|
|
10273
|
Fri Jul 25 17:28:31 2014 |
Harry | Update | General | FOL Box and PER Update | Purpose
We're putting together a box to go
into the 1X2 rack, to facilitate the frequency |
|
|
10274
|
Sat Jul 26 10:12:19 2014 |
Akhil | Update | General | Data Acquisition from FC into EPICS Channels | I succeeded in creating a new channel
access server hosted on domenica ( R Pi)
for continuous data acquisition from the |
|
|
10275
|
Sat Jul 26 13:10:14 2014 |
Akhil | Update | General | Thermal Actuator Transfer Functions | Koji said that the method we used for X-arm
thermal actuator TF measurement was not correct
and suggested us to make measurements separately |
|
|
10276
|
Sat Jul 26 13:38:34 2014 |
Jamie | Update | General | Data Acquisition from FC into EPICS Channels |
|
|
|
10277
|
Sat Jul 26 14:35:28 2014 |
Akhil | Update | General | Data Acquisition from FC into EPICS Channels |
|
|
|
10278
|
Sat Jul 26 14:45:33 2014 |
Gabriele | Metaphysics | ASC | Response of POP QPD | Koji asked me to perform a simulation
of the response of POP QPD DC signal to mirror
motions, as a function of the CARM offset. |
|
|
10279
|
Sat Jul 26 15:30:15 2014 |
Joseph Areeda | Update | Computer Scripts / Programs | NDS2 server propem on megatron | The NDS2 server on megatron was unresponsive
for what i think was the last couple of days.
The NDS the log file (~nds2mgr/logs/nds2-201407151045.log) |
|
|
10280
|
Mon Jul 28 10:42:43 2014 |
Nichin | Update | Electronics | Demodulator board's characterization | I used vector fitting to fit the
transfer functions between RF input and PD
RF MON of demodulator boards. These fittings |
|
|
10281
|
Mon Jul 28 16:34:02 2014 |
Akhil | Update | General | Calibration of measured Thermal Actuator TFs | To calibrate the measured TFs and
characterize the thermal actuator for the
FOL loop, we [ Me, Eric Q, Koji ] made the |
|
|
10282
|
Mon Jul 28 17:25:32 2014 |
Harry | Update | General | Fiber Mode With Collimators | Purpose
We want a measurement of the fiber
modes at either end, with the collimators, |
|
|
10283
|
Mon Jul 28 17:53:00 2014 |
Akhil | Update | General | Work plan for the Upcoming weeks- FOL Project | [Akhil, Harry]
Work
Completed |
|
|
10284
|
Tue Jul 29 07:54:34 2014 |
Steve | Update | SUS | ETMX damping restored | ETMX sus damping restored |
|
|
10285
|
Tue Jul 29 16:41:54 2014 |
Koji | Update | LSC | MC servo | The MC openloop gains were measured
with several conditions
- MC fast/PC crossover was measured |
|
|
10286
|
Tue Jul 29 18:00:20 2014 |
Akhil | Update | LSC | Calibration of ETMX and ETMY actuators | The ultimate goal of characterizing the
temperature actuator turned to be fruitful
in obtaining the calibration values for ETMX |
|
|
10287
|
Tue Jul 29 18:52:42 2014 |
Harry | Update | General | PSL and AUX Coupling Waist Measurement | //edit Manasa// Harry will update
this elog with before/after pictures of the
table and power of the 1064nm rejected beam |
9x |
|
10288
|
Tue Jul 29 18:58:57 2014 |
Nichin | Update | Computer Scripts / Programs | PDFR update and Test run | The PDFR system's interface and scripts
have been updated to include quite a few
more features. |
|
|
10289
|
Tue Jul 29 19:00:40 2014 |
Harry | Update | General | Weekly Plan (7.29.14) | The Past Week
In the past week, I have improved
the coupling in the fiber testing setup on |
|
|
10290
|
Tue Jul 29 20:14:08 2014 |
Andres | Update | 40m Xend Table upgrade | Xarm Green steering mirror upgrade | Xarm Green Steering Mirror Upgrade
Nick
and I did the upgrade for the green steering
mirror today. |
|
|
10291
|
Tue Jul 29 20:14:10 2014 |
Koji | Update | 40m Xend Table upgrade | Xarm Green steering mirror upgrade | That
was super fast! Great job, Andres and Nic! |
|
|
10292
|
Tue Jul 29 21:34:41 2014 |
ericq | Update | Computer Scripts / Programs | SVN bulletin | A heads
up to anyone using SVN with computers on
the Martian network: |
|
|
10293
|
Wed Jul 30 00:42:27 2014 |
Koji | Update | LSC | MC servo | I used an oscillator and an oscilloscope
to measure the open loop transfer function
at higher frequency than 100kHz. |
|
|
10294
|
Wed Jul 30 09:33:33 2014 |
Steve | Update | SUS | RIN of HeNe lasers | From old 40m elog 5-29-2007 |
|
|
10295
|
Wed Jul 30 09:51:18 2014 |
Steve | Update | PSL | PSL Innolight controller fan is noisy |
|
|
|
10296
|
Wed Jul 30 10:16:54 2014 |
Andres | Update | 40m Xend Table upgrade | Green Steering Mirror Upgrade completed | Green Steering Mirror Update
Yesterday,
Nick and I completed the green steering mirrors
upgrade. I attached the file that contained |
|
|
10297
|
Wed Jul 30 11:15:44 2014 |
Akhil | Update | General | Weekly Update | Plan for the week:
PID loop design and testing
with the Green laser beat note by actuating |
|
|
10298
|
Wed Jul 30 15:33:48 2014 |
Akhil | Summary | General | Calibrated Thermal Actuator TFs | The goal of the measurements we made
( my previous 3 elogs) was to characterize
the laser frequency thermal actuator that |
|
|
10299
|
Wed Jul 30 18:09:08 2014 |
Harry | Update | General | AUX and PSL Coupling Telescopes | Purpose
These telescopes will be used to
mode match//couple the dumped SHG light from |
|
|
10300
|
Wed Jul 30 22:01:24 2014 |
Koji | Update | LSC | MC servo | In fact there is a pomona box between the
HV amp and the laser.
It is expected that the combination |
|
|
10301
|
Wed Jul 30 23:12:05 2014 |
Koji | Update | General | IFO patrol | - The cable for the beat note was disconnected
from the frequency counter and reconnected
to the spectrum analyzer. |
|
|
10302
|
Thu Jul 31 01:08:54 2014 |
Koji | Update | LSC | ALS stability check | - ALS X/Y arm stability was checked by
IR locked arms.
- Basically the stability looks same |
|
|
10303
|
Thu Jul 31 09:14:14 2014 |
ericq | Update | IOO | MC stability | Last night, I poked around to try
and see if I could reproduce the sketchy
MC behavior by exciting MC2 in a way that |
|
|
10304
|
Thu Jul 31 11:54:54 2014 |
Akhil | Summary | Electronics | PZT Calibration | Koji asked me to get the calibration
of the PZT counts to Volts for the the X
and Y ends. Yesterday, I went inside the |
|
|
10305
|
Thu Jul 31 12:01:35 2014 |
Nichin | Update | Computer Scripts / Programs | PDFR update | The Transimpedance plots of PDFR now have
a reference plot or baseline plot along with
the current measurement, for easy comparision. |
|
|
10306
|
Thu Jul 31 12:23:38 2014 |
Koji | Summary | Electronics | PZT Calibration | 1) Don't be brainless. Redo the fitting
of the Y arm. Obviously the fit is not good.
2) How can you explain the value |
|
|
10307
|
Thu Jul 31 14:23:28 2014 |
Akhil | Summary | Electronics | PZT Calibration |
The PZT seems to saturate at
around +/- 3500 counts. So for the Y arm, |
|
|
10308
|
Thu Jul 31 15:25:51 2014 |
Harry | Update | General | PolarizationExtinction Ratio of Fibers | Purpose
We wanted to measure the PER of the
polarization maintaining fibers, so we could |
|
|
10309
|
Thu Jul 31 18:54:03 2014 |
Chris | Frogs | elog | MicroSoft BingBot is attacking us |
|
|
|
10310
|
Thu Jul 31 19:37:59 2014 |
Koji | Update | IOO | Successful modification of the FSS | Quick note:
Migration
of the 10Hz pole from the output stage of |
|
|
10311
|
Thu Jul 31 21:21:49 2014 |
Koji | Frogs | elog | MicroSoft BingBot is attacking us | Oh,
this is cool! Thanks!
I could not figure out how to place |
|