| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
295
|
Wed Aug 18 20:16:24 2010 |
Frank | Notes | DAQ | temp sensor 2 of RCAV is too noisy | temp sensor number 2 of the reference cavity
shows much more (horrible) noise compared
to the other ones (2K pkpk). |
|
|
23
|
Sun Dec 6 14:54:43 2009 |
Frank | Laser | RefCav | temp sensor added on refcav2 | added
a single temp sensor on refcav2 (AD590) last
week in order to monitor the temp of |
|
|
202
|
Thu Jul 8 15:20:24 2010 |
Frank | Notes | RefCav | temp sensor calibration | PT1000 value (chamber temp):
1083.9 Ohm
|
|
|
225
|
Thu Jul 15 19:23:51 2010 |
Frank | Notes | PEM | temp sensor calibration using PT1000 | platinum temp sensor (PT1000) used for
calibration of AD590 on PSL table:
Callendar-Van Dusen Equation: |
|
|
1158
|
Tue Apr 23 22:28:53 2013 |
tara | Notes | TempCtrl | temp sensor on heat shields | I checked both temp sensors on the heat
shields. They are working. I can see the
change in resistance when I the heater is |
|
|
1173
|
Fri May 10 01:24:01 2013 |
tara | Notes | TempCtrl | temp sensor on heat shields | AD590s on both thermal shields are not
working. I was wrong when I checked them
at the first time. |
|
|
1813
|
Wed Jan 11 22:00:49 2017 |
yinzi | DailyProgress | TempCtrl | temperature control loop | So the loop itself is functional now (in
terms of all the hardware and software interfacing),
but the metal block didn't actually heat |
|
|
1814
|
Thu Jan 12 22:28:41 2017 |
rana | DailyProgress | TempCtrl | temperature control loop | Wrap the heatsink in some socks or blankets
or foam. In order to get the temperature
to rise you need insulation, same as people |
|
|
265
|
Mon Aug 9 17:34:43 2010 |
Frank | Summary | RefCav | temperature jumps | the temperature in some of the cavity channels
jumps about 5mK if you kick the table hard
enough, so there is some problem with the |
|
|
32
|
Tue Dec 29 19:21:11 2009 |
Frank | Laser | RefCav | temperature stability | here a plot of the temperatute stability
in peter's lab (upper graph) if nobody is
working in the lab (christmas) and if someone |
|
|
685
|
Sat Sep 17 14:44:34 2011 |
Frank | Notes | BEAT | temperature stepping started | changed set point from 26.5degC to 26.6degC
for a first test at 2:42PM local time on
fb2. Tuned the VCO feedback to be ~zero. |
|
|
171
|
Tue Jun 22 17:52:32 2010 |
Frank | Lab Infrastructure | Environment | temperature time series for the last week | temperature time series for the last couple
of days measured right above the table between
both cavities. |
|
|
675
|
Mon Sep 12 01:21:39 2011 |
Frank | HowTo | VCO | temporary VCO solution | thought a little bit about how to create
the difference of 127MHz. Here are two ways
how we can do this right now: |
|
|
748
|
Wed Dec 7 20:44:36 2011 |
Frank | DailyProgress | RFAM | temporary channels | i'm currently adding new channels for RFAM
monitoring and EOM temp control but before
they work i used some other channels for |
|
|
1617
|
Wed Mar 30 08:29:15 2016 |
tara | DailyProgress | PMC | test on new PMC | We
tested one of the two new PMCs. finesse
is ~ 500 and the PZT works fine. |
|
|
1619
|
Wed Mar 30 10:28:44 2016 |
Evan | DailyProgress | PMC | test on new PMC | Wow, nicely done!
For posterity, the design document
is on the DCC: T1600071 |
|
|
1620
|
Thu Mar 31 15:11:27 2016 |
tara | DailyProgress | PMC | test on new PMC | The
measured finesse for the new PMC is ~ 300.
The previous calculation was wrong because |
|
|
1623
|
Tue Apr 5 16:32:36 2016 |
tara | DailyProgress | PMC | test on new PMC | We are hacking the PMC card, to
try to lock the PMC without using a computer.
Aidan helped me try to lock |
|
|
1624
|
Wed Apr 6 15:02:50 2016 |
tara | DailyProgress | PMC | test on new PMC |
Note: V input for RFPD should be
+/- 15 V (schematic)
Power
for driving 21.5 MHz resonant EOM, can |
|
|
1627
|
Fri Apr 8 09:44:49 2016 |
tara | DailyProgress | PMC | test on new PMC | I checked the VME crate, and made
sure that the PMC cards/ LO were
functioning. |
|
|
1839
|
Mon Jun 12 13:48:45 2017 |
yinzi | DailyProgress | TempCtrl | testing heater circuit on test bench | I moved the circuits to the electronics
lab to test it there, and I recreated the
situation that was occuring in the lab. I |
|
|
373
|
Tue Oct 26 16:20:03 2010 |
tarac | Notes | Laser | the laser is broken | The current
1064nm, 100 mW laser in our setup, NPRO lightwave |
|
|
378
|
Tue Nov 2 17:51:31 2010 |
tarac | Notes | Laser | the laser is broken | Frank opened up the laser to find any burnt
mark, but found nothing and put it back,
and now the laser is working. |
|
|
1026
|
Fri Jul 20 00:47:10 2012 |
tara | Notes | Environment | the wall is plastered | The wall between PSL and ATF was drilled,
chiseled and plastered. This hole is for
laser distribution via optical fiber. I'll |
|
|
372
|
Mon Oct 25 21:46:26 2010 |
tara | Notes | NoiseBudget | thermal expansion noise due to RIN | [COLOR=blue][SIZE=3][B] I write up the calculation
for thermo elastic noise due to RIN. The
result from pure thermo elastic noise is |
|
|
58
|
Mon Feb 8 18:08:53 2010 |
Frank | Misc | AOM | thermal images of AOM | took some images with the thermal imaging
camera of the AOM installed in the PSL so
far. The first three pictures show the AOM |
9x |
|
679
|
Fri Sep 16 22:15:03 2011 |
Frank | Summary | Foam | thermal insulation added | when playing with the setup i've noticed
that we are actually very sensitive to temperature
fluctuations (more than i expected), so the |
|
|
31
|
Mon Dec 28 17:01:43 2009 |
Frank | Laser | RefCav | thermal insulation end caps added | we added two endcaps for the first refcav
and additional insulation for the ion pump
and valve. |
|
|
898
|
Wed Apr 4 23:58:43 2012 |
tara | Notes | NoiseBudget | thermal noise from spacer + support | Following the calculation from Kessler,
I estimated brownian noise from the spacer
and the o ring support from our setup. From |
|
|
1109
|
Wed Mar 6 12:48:50 2013 |
tara | DailyProgress | Vacuum | thermal shield + peek supports are baked | I setup the small vacuum chamber to bake
the shields and peek cavity supporting pieces.
All pieces are baked and I'm assembling all |
|
|
968
|
Mon May 21 02:38:48 2012 |
tara | Notes | NoiseBudget | thermo optic noise added to noise budget | Thermo optic noise (coating) calculation
has been added to the noise budget code.
The |
|
|
970
|
Mon May 21 21:11:16 2012 |
tara | Notes | NoiseBudget | thermo optic noise added to noise budget | Frank corrected me that the acoustic coupling
was not improved with the legs changing around
500 Hz. The measurement in comparison was |
|
|
1387
|
Tue Nov 12 15:27:32 2013 |
tara | Notes | Documentation | thesis on ctn | I created an svn folder for my thesis on
CTN measurement.
It can be found here |
|
|
430
|
Wed Dec 15 01:35:44 2010 |
Frank | Notes | RefCav | things to do |
replace windows on acav chamber
by ar-coated windows
find source
of reflection in cavity - my guess it is |
|
|
839
|
Fri Feb 24 14:39:15 2012 |
Frank | Notes | NoiseBudget | things to do on a very short timescale |
measure Marconi phase noise
LOCKED to Rubidium clock for different
input ranges and LO frequencies (make a list |
|
|
576
|
Tue Apr 12 18:42:59 2011 |
Dmass, tara | DailyProgress | TempCtrl | time constant between can and cavity | Today we connected the PT1000 thermostat
on RCAV's stack to C3:PSL-GEN_DAQ16. This
will be used for time constant between chamber |
|
|
578
|
Tue Apr 12 20:54:36 2011 |
Dmass | DailyProgress | TempCtrl | time constant between can and cavity | The 10V supply is an AD587 with a 22 uF
foil capacitor connecting its "noise
reduction" pin (8) to ground which I |
|
|
579
|
Wed Apr 13 09:18:50 2011 |
tara | DailyProgress | TempCtrl | time constant between can and cavity |
This morning, I decided to
adjust RCAV's temperature setpoint (C3:PSL-RCAV_RCPID_SETPOINT) |
|
|
580
|
Wed Apr 13 11:25:13 2011 |
Dmass | DailyProgress | TempCtrl | time constant between can and cavity | Tara, please post what the channel
names are, physically. |
|
|
581
|
Wed Apr 13 11:29:50 2011 |
tara | DailyProgress | TempCtrl | time constant between can and cavity | It's C3:PSL-FSS_SLOWDC. I'm not keeping the
cavity locked in order to avoid any heat
absorption from the beam. I only lock the |
|
|
582
|
Thu Apr 14 10:02:11 2011 |
tara | DailyProgress | TempCtrl | time constant between can and cavity | Result from a step function test.
At ~1.5 h, I changed the temperature setpoint |
|
|
568
|
Thu Apr 7 17:50:16 2011 |
Frank | HowTo | Vacuum | torque for CF flanges | |
|
|
1045
|
Mon Sep 10 22:39:32 2012 |
tara | Notes | RefCav | tranmisson and finesse of the cavity | Here is a note about choosing finesse of
the new cavity. I'll try to incorporate all
the change in the system due to the change |
|
|
1046
|
Tue Sep 11 15:50:38 2012 |
tara | Notes | RefCav | tranmisson and finesse of the cavity | I calculated loss in the cavity by using
the cavity's pole and transmission. For our
cavity with 38kHz pole, T=300ppm, loss on |
|
|
1520
|
Mon Sep 15 18:36:32 2014 |
tara | Notes | Vacuum | transmission of vacuum windows | We measured the transmission of the
vacuum windows. The total transmission through
two windows is 0.975 +/- 0.002. |
|
|
471
|
Fri Feb 4 13:59:48 2011 |
Frank | DailyProgress | BEAT | trend of the setup | This setup has too much gain (i.e.
not enough range). Please |
|
|
1818
|
Wed Feb 22 17:21:36 2017 |
yinzi | DailyProgress | TempCtrl | troubleshooting temp sensor reading | The temperature sensor reading is being
railed to the negative power voltage whenever
a new input command is entered: |
|
|
6
|
Thu Nov 12 17:39:49 2009 |
Frank | Electronics | VCO | tuning range | tuning range of the 80MHz VCO used for
the frequency stabilization:
|
|
|
842
|
Sun Feb 26 01:46:09 2012 |
Frank | DailyProgress | Vacuum | turbo disconnected - ion pump enabled | disconnected the turbo pump and enabled
the ion pump - initial current was
1mA (value before venting was <0.1uA) |
|
|
490
|
Thu Feb 10 16:45:32 2011 |
Frank | Summary | Electronics Equipment | ultra low-noise pre-amps | some old designs i've built some years
ago using the cheaper DIP versions of the
matched BJT pairs from Analog Devices. |
7x |