| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
592
|
Tue Apr 26 22:02:00 2011 |
tara | Notes | FSS | measurement for OLG TF of the TTFSS | I make a plan to measure the open loop
gain transfer function of the TTFSS.
I have |
|
|
594
|
Wed Apr 27 21:07:44 2011 |
tara | Notes | FSS | measurement for OLG TF of the TTFSS | I reoptimized the gain of the
TTFSS, and measured the OLG of the TTFSS
loop. The UGF is 150 kHz. |
|
|
1250
|
Tue Jul 23 10:14:30 2013 |
Erica | DailyProgress | RefCav | measurements of beam size, for calculations about setting up fiber | 7/19/13
took some of the measurements for the refcav's |
|
|
1010
|
Mon Jul 2 00:46:05 2012 |
tara | Notes | NoiseBudget | mechanical loss in spacer | I check how much loss in the spacer would
have to be to have the contribution comparable
to the current beat signal. It turns out |
|
|
468
|
Wed Feb 2 20:47:00 2011 |
koji, frank, tara | Notes | NoiseBudget | mechanical peaks in beat noise | We were looking for optics which cause
peaks in beat noise. Periscopes and mirror
infront of RCAV are more sensitive |
|
|
695
|
Wed Oct 5 22:59:11 2011 |
Koji, Frank | Notes | Seismic | mechanical properties of new stack | today we tried to make a plan of how we
can improve the seismic isolation in an effective
way without to much redesign. From previous |
|
|
918
|
Mon Apr 16 15:35:15 2012 |
Frank, Tara | Summary | NoiseBudget | mechanical resonances | we mapped the mechanical resonances in
our system using two techniques :
tapping each optical component |
|
|
920
|
Mon Apr 16 18:17:05 2012 |
Frank, Tara | Summary | NoiseBudget | mechanical resonances | I was told at JILA that anything less than
3/4" thick is lame.
This place has thick stuff: |
|
|
314
|
Mon Aug 30 11:30:22 2010 |
tara | Notes | Computers | medm screens are frozen | I was measuring the power fluctuation behind
PMC and RCAV, during that the beam was not
locked and the medm screens were frozen, |
|
|
340
|
Thu Sep 2 20:31:01 2010 |
tara | Notes | Computers | medm screens are frozen | 50 mins ago, medm on Sun machine is frozen,
most channels are inactive (except
ACAV_HEATER, and it goes up to 7 which is |
|
|
599
|
Wed May 4 01:20:00 2011 |
tara | DailyProgress | optic | minimizing RFAM/ aligning 35.5 MHz EOM | I minimized
the RFAM by aligning the 35.5 MHz EOM and |
|
|
260
|
Fri Aug 6 22:24:46 2010 |
Frank | Notes | Computers | missing file for medm screens | - personal notes -
medm error message: loadGIF: Cannot
open file: /cvs/cds/caltech/scripts/utilities/nova_logo.gif |
|
|
831
|
Thu Feb 16 19:44:23 2012 |
Frank, Tara | Notes | BEAT | mixer output scaling with load impedance |
==Some intros about this measurement:==
We are using a mixer as a phase detector. |
|
|
2340
|
Fri May 10 15:50:09 2019 |
anchal | Summary | Computers | modbus shifted to a git repo for version control | I today shifted our modbus (db files for
EPICS channels, ioc command files and docker-compose
file to run the services) over to this |
|
|
1209
|
Tue Jun 25 09:58:08 2013 |
Erica | Notes | fiber optic | mode matching | for June 24, 2013
I used MatLab and JamMT to
mode match a laser beam coming from the PMC |
|
|
1213
|
Wed Jun 26 09:44:09 2013 |
Erica | Notes | fiber optic | mode matching | June 25, 2013
Read some papers on noise due to
fiber optics as well as cancellation of phase |
|
|
1215
|
Thu Jun 27 09:12:58 2013 |
Erica | Notes | fiber optic | mode matching | June 26, 2013
Spent the day trying to mode match.
First I used the power meter to measure |
|
|
1222
|
Tue Jul 2 11:21:24 2013 |
Erica | DailyProgress | fiber optic | mode matching | Sorry I type up my progress, but keep on forgetting
to submit.
|
|
|
1224
|
Wed Jul 3 09:46:48 2013 |
Erica | DailyProgress | fiber optic | mode matching | July 2, 2013
Started writing up the progress report due |
|
|
1235
|
Thu Jul 11 01:40:19 2013 |
Erica | DailyProgress | fiber optic | mode matching | Tara changed the lenses in the beam path so
I redid calculations for mode matching.
Here is the setup.
|
|
|
1237
|
Fri Jul 12 00:51:39 2013 |
Erica | Notes | fiber optic | mode matching | I finally got MatLab installed on my computer
from Caltech.
You can get programs installed by being a |
|
|
121
|
Thu May 13 13:41:32 2010 |
Tara Chalermsongsak | Laser | Laser | mode matching from laser to PMC |
|
|
|
176
|
Fri Jun 25 18:27:59 2010 |
tarac | Laser | Laser | mode matching to ACav | The new driver for
AOM is working, the maximum power is ~1.3w. |
|
|
1228
|
Mon Jul 8 21:52:04 2013 |
tara | DailyProgress | optic | mode matching to refcavs | I redid the mode matching for
both refcav, the visibilities are up to ~
93% and 95% for RCAV and ACAV. |
|
|
1240
|
Tue Jul 16 10:27:47 2013 |
Erica | Notes | fiber optic | mode matching, beam recombination | July 14, 2013
We just went with the setup from yesterday. |
|
|
1241
|
Tue Jul 16 11:02:47 2013 |
Erica | Notes | fiber optic | mode matching, beam recombination | July 15,2013
Asked Rana how to do the calculations for |
|
|
1242
|
Wed Jul 17 11:58:47 2013 |
Erica | Notes | fiber optic | mode matching, beam recombination | July 16,2013
I tried improving mode matching by adjusting
two knobs on the mirrors at once but that |
|
|
116
|
Thu May 6 11:01:03 2010 |
Frank | Misc | RC noise | model now in the svn | i created
a folder "frank" in the 40m-svn.
It currently contains a subfolder "comsol" |
|
|
893
|
Thu Mar 29 20:36:59 2012 |
Frank | Notes | FSS | modifications | Made a few modifications to the TTFSS servo
to get a better performance at low frequencies
as the suppressed laser noise is very close |
|
|
935
|
Tue Apr 24 22:10:45 2012 |
tara | Notes | Electronics Equipment | modified UPDH | [Frank, Tara]
We
checked the input referred noise of the UPDH |
|
|
732
|
Tue Nov 15 18:38:20 2011 |
tara | Notes | FSS | modulation index for TTFSS |
By measuring the power of the transmitted
carrier and sideband, we can compute the |
|
|
745
|
Fri Dec 2 20:03:50 2011 |
tara | Notes | FSS | modulation index for TTFSS | I
got the wrong model on the EOM. It is actually
model 4004, not 4003. |
6x |
|
682
|
Sat Sep 17 00:41:41 2011 |
Frank | Notes | VCO | monitor signal | reconnected the VCO monitor signal to the
Marconi tuning input. Tuning input range
is set to 400KHz, tuning coeff is 283880 |
|
|
1835
|
Sun Apr 9 18:10:36 2017 |
yinzi | DailyProgress | TempCtrl | more TempCtrl circuit debugging | Tried separating the power to the sensor
circuit board from the driver circuit board
(so the only connection they share is ground). |
6x |
|
1284
|
Wed Aug 7 13:27:00 2013 |
Erica | DailyProgress | fiber optic | more foam, calculations for convertion from voltage to frequency | august 6, 2013
|
|
|
1379
|
Fri Nov 1 00:22:40 2013 |
tara | DailyProgress | optic | more optimization | I'm putting EOAM back on ACAV path. The
setup is roughly optimized.
(14.75 MHz) EOM , EOAM, quarter waveplate |
|
|
297
|
Thu Aug 19 18:56:29 2010 |
Megan, Frank | Summary | DAQ | moved PD channel to 12bit card (VMIC 3113A) | moved PD channel to 12bit card (VMIC 3113A)
C3:PSL-PMC_PMCTRANSPD now connected
to CH63, pins 64(HI)/63(LO) on block J3 (J3-3113A-P3) |
|
|
427
|
Sun Dec 12 22:11:11 2010 |
tara | Notes | BEAT | nb with VCO noise at 10khz input range | I got Marconi noise data from Frank, and
plotted it on the noise spectrum to show
that we are limited by LO noise at high f. |
|
|
618
|
Wed Jun 29 15:35:06 2011 |
Raphael Cervantes | DailyProgress | FSS | need help improving LISO models | I've tried making LISO models for the PZT
path, EOM path, the EOM HV path, and the
notch filter right next to TP2 on the RF |
19x |
|
622
|
Thu Jun 30 03:25:13 2011 |
Koji | DailyProgress | PMC | need help improving LISO models | For EOM HV:
You need a single zero (or double
zero) in order to make the bend of the magnitude |
|
|
623
|
Tue Jul 5 14:30:35 2011 |
Raphael Cervantes | DailyProgress | FSS | need help improving LISO models | Hey, I tried to improve the models by Koji's
suggestions, but I still can't quite get
them right. Can someone give me some suggestions? |
11x |
|
624
|
Mon Jul 11 15:52:36 2011 |
Raphael | DailyProgress | FSS | need to modify RF summing box | Last Friday, we attempted to measure the
transfer function of the EOM and the EOM
actuator gain. However, we were unsuccessful |
6x |
|
1788
|
Mon Dec 12 18:49:57 2016 |
awade | DailyProgress | Computers | netGPIB python tools and python 3 | I've spent a good chunk of the day
working out how to use the set of python
scripts used to communicate with the |
|
|
1789
|
Mon Dec 12 23:07:25 2016 |
awade | DailyProgress | Computers | netGPIB python tools and python 3 |
Edit Tue Dec 13 10:47:21
2016 (awade): duplicate of PSL:1788 |
|
|
1792
|
Wed Dec 14 14:45:10 2016 |
awade | DailyProgress | Computers | netGPIB python tools and python 3 | I got this working by just reverting back
to python 2.7. I'm using conda
(on mac) to manage python packages so instructions |
|
|
273
|
Thu Aug 12 00:15:59 2010 |
Frank, Megan | Summary | Computers | netgpib scripts working | Megan tested the gpib scripts today and
they are working except that the plotting
of the data doesn't work as some packages |
|
|
1295
|
Tue Aug 13 12:28:20 2013 |
Erica | Notes | Electronics Equipment | new AD 590 circuit and its noise calculation, beam alignment | Attached are noise calculations for a new
circuit for the AD590.
|
|
|
395
|
Tue Nov 16 21:38:24 2010 |
tara | Notes | NoiseBudget | new NoiseBudget | After getting converting factor (RIN->
freq noise) = 1.01 MHz/W. I plot the result
below. |
|
|
53
|
Fri Feb 5 21:10:48 2010 |
Frank | Laser | RefCav | new PD for frequency-shifted power detection | added a detector behind the curved mirror
to measure the changes in deflected power
(1.order) while changing the frequency of |
|
|
683
|
Sat Sep 17 01:53:27 2011 |
Frank | Notes | DAQ | new PEM channel | created a new PEM channels, C3:PSL-PEM_RMTEMP.
Sensor are connected to the temp box for
the cavity. Will probably replace one of |
|