| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12627
|
Fri Nov 18 17:52:42 2016 |
gautam | Update | PSL | FSS Slow control -> Python, WFS re-engaged | [yinzi, craig, gautam]
Yinzi had translated the Perl PID
script used to implement the discrete-time |
|
|
12628
|
Sun Nov 20 23:53:38 2016 |
awade | Update | PSL | FSS Slow control -> Python, WFS re-engaged | I made a very slighly updated version of
Yinzi's script that pulls the channel
names and actuator hardstop limits from |
|
|
12792
|
Thu Feb 2 18:32:51 2017 |
rana | Summary | PSL | PMC alignment | Re-aligned the beam going into the PMC
today around 5 PM. I noticed that its all
in pitch and since I moved both of the mirrors |
|
|
12911
|
Mon Mar 27 20:41:21 2017 |
rana, gautam | Update | PSL | PMC DAQ assay for feed-forward integration | We are thinking to use the PMC signals
to help us in figuring out the feedback /
feedforward stuff and making it better. |
|
|
12916
|
Wed Mar 29 11:41:19 2017 |
gautam | Update | PSL | PMC DAQ assay for feed-forward integration | The C1IOO frontend machine that resides
in 1X1/1X2 has 2 ADCs, ADC0 and ADC1. The
latter has 28 out of 32 channels unused at |
|
|
12918
|
Thu Mar 30 00:16:09 2017 |
gautam | Update | PSL | PSL NPRO PZT calibration | As part of the ongoing effort to try and
calibrate the PMC DAQ channels into physical
units, I tried to get a calibration for the |
|
|
12920
|
Thu Mar 30 18:11:01 2017 |
rana | Update | PSL | PMC DAQ assay for feed-forward integration | What you have drawn looks good to me: the
cut should be between TP3 and pin3 of the
AD620. This should maintain the DC coupled |
|
|
12925
|
Mon Apr 3 17:25:13 2017 |
gautam | Update | PSL | PSL NPRO PZT calibration | Summary:
By sweeping the laser frequency
and looking at the PMC PDH error signal, |
|
|
12926
|
Mon Apr 3 23:07:09 2017 |
gautam | Update | PSL | PMC DAQ assay for feed-forward integration | I made some changes to the DAQ path on
the PMC servo board, as per the plan posted
earlier in this thread. Summary of changes: |
|
|
12928
|
Tue Apr 4 17:27:58 2017 |
rana | Update | PSL | PSL NPRO PZT calibration | good cal. I wonder if this data also gives
us a good measurement of the cavity pole
or if the photo-thermal self-locking effect |
|
|
12939
|
Tue Apr 11 00:38:37 2017 |
gautam | Update | PSL | PMC demod moved off servo board | As discussed at the Wednesday meeting last
week, I tried moving the demodulation of
the PMC error signal off the PMC servo board, |
|
|
12940
|
Wed Apr 12 00:36:53 2017 |
gautam | Update | PSL | PMC demod moved off servo board | Here is a more detailed comparison of the
spectra of the signals at the front panel
DAQ LEMO output, measured with the Agilent |
|
|
12944
|
Tue Apr 18 01:01:03 2017 |
gautam | Update | PSL | PMC OLTF measured, DAQ channels calibrated | Quick entry, details to follow in the AM
tomorrow.
I calibrated the PMC DAQ |
|
|
12945
|
Tue Apr 18 16:10:00 2017 |
gautam | Update | PSL | PMC OLTF measured, DAQ channels calibrated | Here are the details:
PMC OLTF:
the
procedure used was identical to what Koji |
|
|
12946
|
Tue Apr 18 23:37:15 2017 |
rana | Update | PSL | PMC OLTF measured, DAQ channels calibrated | What's
the reasoning behind setting the the gain |
|
|
12947
|
Wed Apr 19 15:13:30 2017 |
gautam | Update | PSL | PMC/MCL multicoherence | I used a one hour stretch of data from
last night to look at coherence between the
PMC control signal and MCL, to see if the |
|
|
13137
|
Mon Jul 24 12:00:21 2017 |
gautam | Update | PSL | PSL NPRO mysteriously shut off | Summary:
At around 10:30AM |
|
|
13213
|
Wed Aug 16 14:57:01 2017 |
Steve | Update | PSL | ref Cavity heating blanket power supply | The last entry I found relating to ref
cavity was
2011 Aug 19 |
|
|
13223
|
Thu Aug 17 08:42:27 2017 |
Steve | Update | PSL | PSL HEPA | The PSL HEPA was running noisy at 100V
The bearing is wearing out. I turned it down
to 30V It is quiet there. |
|
|
13264
|
Mon Aug 28 23:22:56 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I moved the axuiliary NPRO to the PSL table
today and started setting up the optics.
The Faraday Isolator was showing |
|
|
13270
|
Tue Aug 29 20:04:09 2017 |
rana | Update | PSL | PSL table auxiliary NPRO | I don't understand why the 1st order
diffracted beam doesn't go to zero when
you shut off the drive. My guess is that |
|
|
13271
|
Tue Aug 29 21:36:59 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO |
|
|
|
13278
|
Thu Aug 31 00:19:35 2017 |
rana[^r] | Update | PSL | IMC/FSS FAST gain | nominal changed from 22 to 23 dB to minimize
PC drive RMS
|
|
|
13298
|
Tue Sep 5 23:13:44 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I used Gautam's mode measurement of
the auxiliary NPRO (w=127.3um,
z=82mm) for the spacing of the optics |
|
|
13301
|
Thu Sep 7 23:09:00 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I brought the DEI Pulser
unit and a suitable Pockels cell
over from Bridge today (I also found an identical |
|
|
13306
|
Mon Sep 11 12:40:32 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I changed the PSL table auxiliary laser
setup to the 200 MHz AOM and put the light
back in the fiber. Coupling efficiency is |
|
|
13457
|
Wed Nov 29 15:33:16 2017 |
rana | Update | PSL | PMC locking | PMC wasn't locking. Had to power down
c1psl. Did burt restore. Still not great.
I think many of the readbacks on |
|
|
13488
|
Mon Dec 18 20:37:18 2017 |
gautam | Update | PSL | PMC MEDM cleanup | There are fewer lies on this screen now.
For reference, the details of the electronics
modifications made are in this |
|
|
13532
|
Thu Jan 11 14:47:11 2018 |
Steve | Update | PSL | shelf work for tomorrow | I have just received the scheduling of
the PSL self work for tomorrow. Gautam and
I agreed that if it is needed I will shut |
|
|
13538
|
Fri Jan 12 10:26:24 2018 |
Steve | Update | PSL | PSL shelf work schedule | Measurements for good fit were made. The
new shelf will be installed on next Tuesday
at 2pm |
|
|
13549
|
Tue Jan 16 11:05:51 2018 |
gautam | Update | PSL | PSL shelf - AOM power connection interrupted | While moving the RefCav to facilitate the
PSL shelf install, I
bumped the power cable to the AOM driver. |
|
|
13550
|
Tue Jan 16 16:18:47 2018 |
Steve | Update | PSL | new PSL shelf in place | [ Johannes, Rana, Mark and Steve ]
On the second trial the shelf was
installed. Plastic cover removed. South end |
|
|
13551
|
Tue Jan 16 21:46:02 2018 |
gautam | Update | PSL | PSL shelf - AOM power connection interrupted | Johannes informed me that he touched up
the PMC REFL camera alignment. I am holding
off on re-soldering the AOM driver power |
|
|
13714
|
Wed Mar 28 17:28:58 2018 |
Steve | Update | PSL | noise eater on or off | Till RIN measurement noise eater is off
on 2W laser. The inno 1W has no noise
eater. |
|
|
13743
|
Mon Apr 9 23:49:50 2018 |
rana | Update | PSL | PSL chans | I think we can scrap the 126MOPA channels
since they're associated with the Lightwave
NPRO and MOPA. We should add the channels |
|
|
13818
|
Sat May 5 20:30:21 2018 |
Koji | Update | PSL | Modulation depth measurement for the 3IFO aLIGO EOM and aftermath | Caution:
Because of this work and my negligence, the
RF output of the main Marconi for the IFO |
|
|
13819
|
Sat May 5 22:32:07 2018 |
Koji | Update | PSL | Modulation depth measurement for the 3IFO aLIGO EOM | The 3IFO EOM was formerly tuned as the
H2 EOM, so the resonant frequencies are different
from the nominal aLIGO ones. |
|
|
13842
|
Tue May 15 10:42:14 2018 |
Koji | Update | PSL | Modulation depth measurement for the 3IFO aLIGO EOM and aftermath | The marconi RF output was turned on and
thus the RF generator condition was restored
to the nominal state on Friday 11th. |
|
|
13900
|
Thu May 31 02:04:55 2018 |
johannes | Update | PSL | AUX laser state of mind | The AUX laser is down to 5.4 mW output
power |
|
|
13911
|
Sun Jun 3 22:48:59 2018 |
johannes | Update | PSL | aux laser replacement | I brought the NPRO from the Crackle experiment
over to the 40m Lab and set it up on the
PSL table to replace the slowly dying AUX |
|
|
13912
|
Mon Jun 4 02:52:52 2018 |
johannes | Update | PSL | aux laser replacement | > While the laser output is going strong,
the controller displays a power output of
only 10 mW, which makes me think that the |
|
|
13913
|
Mon Jun 4 11:00:37 2018 |
gautam | Update | PSL | aux laser replacement |
Quote:
|
|
|
13916
|
Tue Jun 5 02:06:59 2018 |
gautam | Update | PSL | aux laser first (NULL) results | [johannes,
gautam] |
|
|
13924
|
Thu Jun 7 10:26:36 2018 |
keerthana | Update | PSL | observing the resonance signal corresponding to the injected frequency. |
(Johannes, Koji,
Keerthana)
The PLL loop ensures that the frequency |
|
|
13930
|
Thu Jun 7 22:36:09 2018 |
not keerthana | Update | PSL | observing the resonance signal corresponding to the injected frequency. | I worked a bit on the PSL table today |
|
|
13931
|
Fri Jun 8 00:36:54 2018 |
gautam | Update | PSL | observing the resonance signal corresponding to the injected frequency. | It isn't clear to me in the drawing
where the Agilent is during this measurement.
Over 40m of cabling, |
|
|
13932
|
Fri Jun 8 01:08:22 2018 |
johannes | Update | PSL | First light of AUX at YEND | Among the things that we hadn't taken
care of yesterday before beginning to look
for transmission signals were the polarization |
|
|
13981
|
Mon Jun 18 14:32:42 2018 |
gautam | Update | PSL | Optics on AS table | Yesterday, I moved the following optics:
Lens in front of AS110
PD.
BS splitting light between |
|
|
13982
|
Mon Jun 18 15:59:17 2018 |
johannes | Update | PSL | Optics on AS table |
Quote:
|
|
|
13983
|
Mon Jun 18 16:57:54 2018 |
Koji | Update | PSL | Optics on AS table | Of course, many (but no all) of the optics
were custom-ordered back in ~2000. |
|