| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
282
|
Fri Aug 13 20:23:33 2010 |
Tara | Notes | NoiseBudget | | I tried to separately mesh the geometry.
Only the small part (1/2 radius,
1/3 thickness) is extremely fine mesh, the |
|
|
386
|
Tue Nov 9 22:10:01 2010 |
tara | Notes | Electronics Equipment | | |
|
|
2257
|
Thu Nov 22 12:49:35 2018 |
anchal | DailyProgress | TempCtrl | | The configuration run:
I
ran overnight PIDAutoTune with following
parameters: |
|
|
266
|
Mon Aug 9 19:57:29 2010 |
tara | Notes | NoiseBudget | DC simulation by COMSOL 4.0 | I use COMSOL to simulate the mirror of
RefCav.
I tried only DC heating from the |
|
|
1374
|
Sun Oct 27 20:12:25 2013 |
tara | Notes | optic | photothermal noise in AlGaAs | I revised the calculation for photo-thermal
noise in AlGaAs coatings, the photo thermal
noise should not be a limiting source. |
|
|
1392
|
Wed Dec 18 21:05:28 2013 |
tara | Notes | optic | photothermal noise in AlGaAs: thickness resolution | We heard back from G. Cole about the thickness
resolution in the AlGaAs coating manufacturing
process will be around 0.5 A. So I'm checking |
8x |
|
11
|
Fri Nov 13 11:12:38 2009 |
Frank | Laser | RefCav | temp settings for both cavities | current settings for the slow actuator
to bring the cavities on resonance are:
refcav 1 : 0.6836V
|
|
|
1075
|
Wed Nov 14 00:25:48 2012 |
tara | Notes | NoiseBudget | ฺBrownian noise in spacer and substrate | I used COMSOL model to calculated
Brownian noise in substrate. This was done
for cross checking my model simulation. The |
|
|
1051
|
Sun Sep 23 18:28:04 2012 |
tara | Notes | Drawings | 1.45" refcav mount | I'm working on the new mount for 1.45"
refcav. I 'll discuss the design with Eric
G and some mech engineers (Mike Smith, Ken |
|
|
1054
|
Thu Sep 27 17:13:13 2012 |
tara | Notes | Drawings | 1.45" refcav mount | modification of the previous mount, work
in progress.
|
|
|
1068
|
Wed Oct 31 16:00:13 2012 |
tara | Notes | Drawings | 1.45" refcav mount | I finished the design for dual cavity mount.
The assembly looks fine, all parts fit together.
I'll make sure that the mount can be screwed |
|
|
1071
|
Thu Nov 8 20:00:33 2012 |
tara | Notes | Drawings | 1.45" refcav mount | I finished the drawing for refcav mount
and the top plate. Everything fits together,
so I'll submit the drawing tomorrow. |
7x |
|
122
|
Thu May 13 20:56:57 2010 |
Frank | Laser | Laser | 100mW NPRO problems | we still have serious problems with the
100mW laser head. I traced it down to the
connection between the PCB and the hermetically |
|
|
69
|
Fri Feb 19 00:31:40 2010 |
Frank | Laser | Laser | 100mW lightwave NPRO slope | Peter gave me the hint that the default
values are stored in an eeprom in the laser
head. So connecting the head to a driver |
|
|
785
|
Tue Jan 17 21:59:47 2012 |
tara | DailyProgress | optic | 14.75MHz EOM | As we decided to use lower sideband frequency
(14.75MHz, instead of 35.5MHz), I replaced
the Broadband EOM with 14.75MHz EOM. |
|
|
787
|
Thu Jan 19 01:19:31 2012 |
tara | DailyProgress | optic | 14.75MHz EOM | The 14.75 MHz EOM we have is for visible
light, so we went to TNI and borrowed a 14.75
MHz EOM for IR and an 14.75 Mhz resonant |
|
|
434
|
Mon Dec 20 00:08:57 2010 |
Jan | Summary | PEM | 2-day seismic analysis | One of my DAQs (18bit, 1V range, NI 6289) in
the seismo lab is recording data from
a T240 broadband seismometer on the PSL table. |
13x |
|
2083
|
Fri Feb 9 11:36:08 2018 |
awade | DailyProgress | NoiseBudget | 200-3000 Hz hump search | So 1-2 kHz feature has popped up
from time to time in previous beats.
It seems to be mostly arise from changes |
|
|
2087
|
Mon Feb 12 16:29:50 2018 |
awade, Craig | DailyProgress | NoiseBudget | 200-3000 Hz hump search | Attempting to identify the source of the
200-3000kHz hump.
Optimizing polarization into north |
|
|
2094
|
Fri Feb 16 12:41:32 2018 |
awade, Craig | DailyProgress | NoiseBudget | 200-3000 Hz hump search | Following up on the last optimization of
RFAM (see PSL:2087),
I tried to obtain the -80 dBm RFAM at the |
|
|
1870
|
Fri Aug 18 21:22:26 2017 |
Craig, awade | DailyProgress | NoiseBudget | 2017 Aug 18 Trans Beatnote Spectra | Here is our first trans spectrum in Vrms/rtHz.
We haven't had time to fully calibrate
the PLL actuation to get the spectrum into |
|
|
1138
|
Thu Apr 4 11:44:14 2013 |
Evan | Notes | PMC | 270 Hz clamped PMC twisting mode | I ran another Comsol simulation with a
simplified version of the PMC spacer. This
time I put fixed constraints on two circular |
|
|
1841
|
Thu Jun 22 14:55:37 2017 |
awade | Misc | Electronics Equipment | 30A @ 125 V plug install for UPS | I've bought a UPS to help the lasers
+ computer ride out the frequenent power
outages in Bridge West. Its needs a |
|
|
1842
|
Thu Jul 6 15:54:25 2017 |
awade | DailyProgress | Electronics Equipment | 30A @ 125 V plug install for UPS + rack mounting | UPS supply 30A plug is installed in the
PSL lab in the corner by the rack. Port
058B/38. |
|
|
292
|
Wed Aug 18 16:33:52 2010 |
Frank | Summary | DAQ | 3123 card broken ? | the 3123 card (16bit input) seems to be
broken. That's the card which also samples
the PMC transmitted light which fluctuates |
|
|
1860
|
Tue Aug 15 14:49:27 2017 |
Craig, awade | DailyProgress | PD | 35.5 MHz RFPDs Transfer Functions | I took the transfer function through our
two 35.5 MHz RFPDs.
RFPD B, labeled "Low Q" |
|
|
1861
|
Wed Aug 16 12:51:21 2017 |
rana | DailyProgress | PD | 35.5 MHz RFPDs Transfer Functions | No, we don't want low Q
for the PMC RFPDs. We want Q
~10 for the RefCav RFPDs, and whatever high |
|
|
1862
|
Wed Aug 16 13:50:26 2017 |
awade | DailyProgress | PD | 35.5 MHz RFPDs Transfer Functions | The two PMCs craig measured are for the
RefCav RFPDs. I don't recall if
we had a second 21.5 MHz resonant RFPD for |
|
|
1864
|
Thu Aug 17 00:01:00 2017 |
rana | DailyProgress | PD | 35.5 MHz RFPDs Transfer Functions | agreed; should do for all labs
|
|
|
417
|
Fri Dec 3 02:00:36 2010 |
tara | Notes | Electronics Equipment | 35.5 MHz pick up | There is a 35 MHz pick up from cables to
the crate. Right now there are ACAV and RCAV_RCTRANSPD
that cause the pick up. |
|
|
1636
|
Tue May 31 13:26:21 2016 |
Aidan | Summary | RF | 36MHz and 37MHz Wenzel crystals added to the lab for PDH | I have a set of two Wenzel OCXO added to
the electronics chassis, courtesy of the
gentry from the Cryo Lab. The chassis has |
|
|
1959
|
Thu Oct 26 11:08:05 2017 |
awade, Craig | DailyProgress | FSS | 50 MHz oscillations in TTFSS rev. C field boxes | [awade, Craig]
As a side note to this diagnostic
oscilloscope probing I noticed the other |
|
|
1960
|
Thu Oct 26 11:21:50 2017 |
Koji | DailyProgress | FSS | 50 MHz oscillations in TTFSS rev. C field boxes | If
you have an oscillation in a circuit, it
is no longer linear! |
|
|
1961
|
Thu Oct 26 15:57:37 2017 |
awade | DailyProgress | FSS | 50 MHz oscillations in TTFSS rev. C field boxes | Ok. Doesn't sound great, but is common
to both the units we have.
The AD797 is configured with a |
|
|
2424
|
Wed Sep 11 10:42:50 2019 |
anchal | DailyProgress | NoiseBudget | 500 Hz hump gone! |
Checkout the latest noisebudget. |
|
|
2127
|
Fri Mar 9 16:10:41 2018 |
Craig, awade | DailyProgress | scatter | 500 Hz resonant scatter hump in beatnote ASD | If you look at our
beatnote ASD you can see a broad dirty
hump at 500 Hz. |
|
|
2128
|
Sun Mar 11 16:50:59 2018 |
Craig, awade | DailyProgress | scatter | 500 Hz resonant scatter hump in beatnote ASD | After buzzing the table with a probe at
500 Hz, the source of the 500 Hz resonance
is the first steering mirror after the PMC. |
|
|
676
|
Tue Sep 13 01:11:51 2011 |
Frank | Notes | optic | 50:50 beamsplitter data - scanned spec sheets from ATF | found the box with the beam splitters Dmass
bought almost 2 years ago but never unpacked
or used. They are super-polished 50:50 beam |
|
|
1427
|
Mon Jun 9 20:42:21 2014 |
Evan | DailyProgress | fiber optic | 60 m PM980-XP fiber | I used the 633 nm fiber illuminator and
the ThorLabs power meter (set to 633 nm)
to test the 60 m polarization-maintaining |
|
|
2070
|
Sat Feb 3 18:08:26 2018 |
awade | DailyProgress | PMC | A few more modifications to the PMC north board | A few more changes to the PMC north board.
Hopefully this is the last.
Changing series resistance at |
|
|
139
|
Tue Jun 1 19:26:41 2010 |
tarac | Laser | Laser | A mirror gets into the insulation's border | I'm aligning the AOM. The R=0.5m mirror's
position crosses the insulation border by
1.5" (see attached picture.) The black |
|
|
517
|
Mon Feb 28 09:48:27 2011 |
Frank | Summary | RefCav | ACAV PID parameters wrong | after rebooting yesterday the ACAV
heater was railing over night.
Today i figured out that the integrater |
|
|
525
|
Wed Mar 2 15:47:45 2011 |
Frank | Notes | TempCtrl | ACAV PID process stopped with error | PID process running on the Sun workstation
stopped at lunch time with error "couldn't
read process variable ...bla bla bla " |
|
|
455
|
Wed Jan 26 20:21:57 2011 |
Frank | Summary | Electronics Equipment | ACAV RFPD modified | The ACAV RFPD stopped working this afternoon.
It had high current consumption on the +15V
supply, causing the supply to drop down to |
|
|
573
|
Mon Apr 11 01:43:01 2011 |
tara | Notes | Electronics Equipment | ACAV RFPD's schematic | I updated the schematic for ACAV RFPD.
I'll update the schematic for RCAV
servo, ACAV servo as well. |
|
|
902
|
Fri Apr 6 01:36:39 2012 |
Tara, Frank | Summary | NoiseBudget | ACAV loop changes | summary of all changes made and more detailed
plots will be posted soon, so check back
later |
|
|
659
|
Wed Aug 17 20:41:13 2011 |
tara | DailyProgress | optic | ACAV path is up | I put most optics on ACAV path. I have
not tried to lock the cavity yet. I'll install
ACAV RFPD next. |
|
|
285
|
Tue Aug 17 14:35:34 2010 |
Frank | Summary | RefCav | ACAV re-aligned | re-aligned the ACAV once more, now about
91% are coupled into the cavity |
|
|
521
|
Mon Feb 28 13:47:35 2011 |
Frank | Notes | RefCav | ACAV temp back around 37.1 degC | current heater value is around 4.66. changed
crate startup value to current value |
|
|
1565
|
Wed Aug 5 15:59:07 2015 |
Aidan, Antonio | Summary | RefCav | ACAV transmission on RF photodiode | We swept the temperature of the ACAV laser
and monitored the transmission through the
cavity. In the attached image, the TEM00 |
|