| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10210
|
Wed Jul 16 01:27:01 2014 |
Nichin | HowTo | Computer Scripts / Programs | HP8591E spectrum analyzer remote scan | The script for running continuous scans
on HP 8591E spectrum analyzer is located
at scripts/general/netgpibdata |
|
|
10211
|
Wed Jul 16 01:35:16 2014 |
Koji | Summary | LSC | Python Wavelet peak finding for dramatic ALS - Red Resonance finding speedup | From the last plot:
- Subtracting the offset of 0.0095,
the modulation depth were estimated to be |
|
|
10212
|
Wed Jul 16 01:46:41 2014 |
Nichin | Update | Electronics | Test run of PDFR system | A test run was conducted on the PDFR system
last afternoon and transimpedance plots were
generated for 6 of the PDs. The laser |
|
|
10213
|
Wed Jul 16 01:54:25 2014 |
Nichin | Update | General | Work plan for next week | 1) Debugging transimpedance calculations
in the PDFR
Requires |
|
|
10214
|
Wed Jul 16 02:22:10 2014 |
Koji | Update | Electronics | Test run of PDFR system | Log-log ... |
|
|
10215
|
Wed Jul 16 07:51:52 2014 |
Akhil | Update | General | Weekly Update | Work
Done:
Solved all the timing |
|
|
10216
|
Wed Jul 16 15:26:48 2014 |
Steve | Update | PSL | PSL Innolight controller fan is dying |
|
|
|
10217
|
Wed Jul 16 17:06:41 2014 |
Nichin | Update | Computer Scripts / Programs | HP8591E spectrum analyzer remote scan | Updated script does the following:
1) Gets the highest 2 peaks
2) Puts a marker on the peaks. Now |
|
|
10218
|
Wed Jul 16 17:34:11 2014 |
Harry | Update | General | Fiber Coupled | Purpose
To couple the spare NPRO into our
Panda PM980 fibers, in order to carry out |
|
|
10219
|
Wed Jul 16 19:38:37 2014 |
manasa | Summary | PSL | AOM alignment issues and removed from beam path | AOM removed
from the beampath and PMC relocked. |
|
|
10220
|
Wed Jul 16 21:23:35 2014 |
Manasa | Update | PSL | PSL Innolight controller fan is dying | [Koji, Manasa]
The air flow from the dying fan was
kinda weak and we decided to give a help |
|
|
10221
|
Wed Jul 16 21:24:41 2014 |
Reetika | Update | Electronics | VCO Driver inside 40m |
I
found the VCO driver, that Rana asked me |
|
|
10222
|
Wed Jul 16 22:17:40 2014 |
Akhil | Summary | Electronics | Bode Plots and complete Characterization of Frequency Counter | Goal:
To estimate the transfer function
and the noise in the FC that is a part of |
|
|
10223
|
Wed Jul 16 23:02:16 2014 |
Koji | Summary | Electronics | Bode Plots and complete Characterization of Frequency Counter | If I assume 1sample delay for 0.1s sampling
rate, the delay is Exp[-I 2 pi f T], where
T is the sampling period. |
|
|
10224
|
Thu Jul 17 00:38:30 2014 |
Jenne | Update | LSC | RIN in arm transmission | [Rana, Jenne]
We had a look at the RIN of the transmission
signals TRX and TRY, when the arms were individually |
|
|
10225
|
Thu Jul 17 01:24:35 2014 |
rana | Update | IOO | MC / EOM Stability Mystery Solved! | MC loop is near
unstable. Common gain reduced. Needs more |
|
|
10226
|
Thu Jul 17 02:57:32 2014 |
Andres | Update | 40m Xend Table upgrade | FInish Calculation on Current X-arm mode Matching | Data and Calculation for the
Xarm Current Mode Matching |
|
|
10227
|
Thu Jul 17 16:07:34 2014 |
Emily | Update | Electronics | VCO Driver | I took back he VCO driver that Reetika
brought over to the 40m from the PSL lab.
|
|
|
10229
|
Thu Jul 17 16:39:34 2014 |
Nichin | Update | Electronics | PDFR debugging attempt : REFL11 | In a attempt to debug the values of transimpedance
generated by the PDFR system, I did a manual
measurement for REFL11 PD. |
|
|
10230
|
Thu Jul 17 17:08:58 2014 |
Harry | Update | General | 1X2 Rack Changes | Purpose
Steve and I moved some things around |
|
|
10231
|
Thu Jul 17 17:19:25 2014 |
Steve | Update | PSL | PSL Innolight controller fan is dying with extra fan |
|
|
|
10232
|
Thu Jul 17 17:39:57 2014 |
Koji | Update | Electronics | PDFR debugging attempt : REFL11 | What is the coupling factor between the
RF in and the RF mon of the demodulator?
|
|
|
10233
|
Thu Jul 17 21:01:28 2014 |
Manasa | Update | General | 1X2 Rack Changes |
|
|
|
10234
|
Thu Jul 17 22:08:14 2014 |
Koji | Update | General | 1X2 Rack Changes | It sounds like the work was done carefully.
Even so, Jenne or Manasa have to run the
ALS (X and Y) to check if they are still |
|
|
10235
|
Fri Jul 18 14:59:07 2014 |
Evan | Update | IOO | MC servo TFs | [Rana, Evan]
This morning we took several TFs
of the MC servo board using the HP4395A. |
|
|
10236
|
Fri Jul 18 15:21:12 2014 |
ericq | Update | Computer Scripts / Programs | Local Chiara backups |
|
|
|
10237
|
Fri Jul 18 16:52:56 2014 |
Andres | Update | 40m Xend Table upgrade | FInish Calculation on Current X-arm mode Matching |
|
|
|
10238
|
Fri Jul 18 17:10:57 2014 |
Nichin | Summary | Electronics | Characterization of demodulator boards. | Rack 1Y2, I took transfer function measurements
for each of the following demodulator boards:
REFL11, REFL33, REFL55, REFL165, AS55, POP22, |
|
|
10239
|
Fri Jul 18 19:32:50 2014 |
Akhil | Summary | Electronics | Filters used inside the Frequency Counter |
Thanks Koji , for your hint
for the brain teasing puzzle. I was looking |
|
|
10240
|
Sat Jul 19 01:59:34 2014 |
Harry | Update | General | Fiber Mode Measurement | Purpose
We wanted to measure the mode coming
out of the fibers, so we can later couple |
|
|
10241
|
Sat Jul 19 17:36:44 2014 |
Jenne | Update | LSC | RIN in arm transmission | I looked at what the RIN contribution of
the sqrtInv sensor is by locking the arms
individually on IR using POX and POY. |
|
|
10242
|
Sat Jul 19 20:51:51 2014 |
Koji | Update | LSC | RIN in arm transmission | Your
calibration of the ALS signal should be revised.
The phase for the ALS is not an optical |
|
|
10243
|
Sun Jul 20 09:26:27 2014 |
Evan | Update | Electronics | MC servo card modifications in DCC |
|
|
|
10244
|
Mon Jul 21 10:30:38 2014 |
Harry | Update | General | Fiber Mode Measurement | Purpose
The idea was to measure the profile
of the light coming out of the fiber, so |
|
|
10245
|
Mon Jul 21 10:51:06 2014 |
Steve | Update | VAC | N2 supply run out | Interlock closed valve V1, V4, V5 and VM1
when the nitrogen supply run out. The IFO
pressure rose to P1 1 mTorr |
|
|
10246
|
Mon Jul 21 12:16:27 2014 |
Akhil | Summary | Electronics | Filters used inside the Frequency Counter | The expected bode plots for such
a filter with L= 4 is attached and compared |
|
|
10247
|
Mon Jul 21 13:58:33 2014 |
ericq | Update | IOO | MC autolocker acting up | The autolocker claimed it was running and
blinking, but not doing anything (i.e. lock
bit was not updating and no switches or sliders |
|
|
10248
|
Mon Jul 21 17:32:43 2014 |
ericq | Summary | LSC | Arm losses |
|
|
|
10249
|
Mon Jul 21 18:08:19 2014 |
Harry | Update | General | Fiber Mode Measurement |
|
|
|
10250
|
Tue Jul 22 08:24:42 2014 |
Evan | Update | Electronics | MC servo card: modified schematic |
|
|
|
10251
|
Tue Jul 22 08:36:08 2014 |
Evan | Update | IOO | MC servo TFs |
|
|
|
10252
|
Tue Jul 22 15:50:35 2014 |
Nichin | Summary | Electronics | Characterization of demodulator boards. |
|
|
|
10253
|
Tue Jul 22 15:54:19 2014 |
ericq | Update | SUS | ITMY Oplev Recentered | ITMY oplev was nearly clipping in
yaw, causing wonky behavior (POY lock popping
in and out frequently). I recentered it and |
|
|
10255
|
Tue Jul 22 16:26:04 2014 |
Harry | Update | General | Fiber Mode Measurement | I repeated this process once more, this
time using the computer controlled stage
that the beam profiler is designed to be |
|
|
10256
|
Tue Jul 22 17:45:11 2014 |
Harry | Update | General | Weekly Update | The Past Week
I spent the past week coupling NPRO |
|
|
10257
|
Tue Jul 22 23:10:12 2014 |
Akhil | Update | General | Weekly Update | Work
Done |
|
|
10258
|
Wed Jul 23 02:01:15 2014 |
Jenne | Update | LSC | RIN in arm transmission - revised calibration |
As Koji pointed out, I messed up
the calibration. However, fixing it |
|
|
10259
|
Wed Jul 23 10:39:18 2014 |
Steve | Update | Cameras | video quad processors replaced | Quad
processor 2 & 3 were replaced. |
|
|
10260
|
Wed Jul 23 10:40:23 2014 |
Nichin | Update | General | Weekly Update | To do:
Measure and calibrate out attenuation
and phase changes due to RF cables in the |
|
|
10261
|
Wed Jul 23 11:15:54 2014 |
Akhil | Update | Electronics | Installation of FCs in the 40m | As a part of installation of two(X-ARM
and Y-ARM) frequency counters in the 40m,
I have tested their performance when using |
|