ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
151
|
Mon Jun 7 19:24:04 2010 |
tarac | Laser | Laser | RefCav is locked | RefCav
is locked , the beam is more stable than yesterday |
|
|
152
|
Tue Jun 8 03:16:21 2010 |
Frank | Laser | Laser | RefCav is locked | nice good job!
you can get the names for the channels |
|
|
153
|
Tue Jun 8 20:16:21 2010 |
tarac | Laser | Laser | scanning ACav | Now I'm
working on aligning the beam into ACav. I
got the reflected light on the PD, and I'll |
|
|
154
|
Wed Jun 9 03:55:40 2010 |
Frank | Laser | Laser | scanning ACav | There is no attenuator connected to the
AOM. The device on the AOM (the white attenuator
looking like thing) is a |
|
|
155
|
Wed Jun 9 03:55:41 2010 |
Frank | Laser | Laser | scanning ACav | There is no attenuator connected to the
AOM. The device on the AOM (the white attenuator
looking like thing) is a |
|
|
156
|
Wed Jun 9 03:55:41 2010 |
Frank | Laser | Laser | scanning ACav | There is no attenuator connected to the
AOM. The device on the AOM (the white attenuator
looking like thing) is a |
|
|
157
|
Thu Jun 10 00:21:15 2010 |
tarac | Laser | Laser | scanning ACav | I'm
scanning the laser to align ACav. It's a
long day of adjusting 4 knobs and 1 lens |
|
|
158
|
Fri Jun 11 01:04:42 2010 |
tarac | Laser | Laser | scanning Acav2 | From yesterday,
after getting TEM 00 out of the cavity, I |
|
|
159
|
Sat Jun 12 17:11:26 2010 |
Koji | Electronics | VCO | PSL VCO removed and sent to LLO | As per the request from LLO, the PSL VCO
was sent to the site.
They had malfunctioning of the circuit |
|
|
160
|
Mon Jun 14 10:16:54 2010 |
tarac | Misc | Other | weird TF from PMC servo | Since the
VCO has been borrowed, I decide to work on
RefCav path again. To optimize the RefCav |
|
|
161
|
Tue Jun 15 09:44:56 2010 |
tarac | Electronics | | PMC servo TF |
The weird TF result from PMC seems to be
the result of the insufficient voltage input. |
|
|
162
|
Tue Jun 15 10:14:32 2010 |
Frank | Electronics | | PMC servo TF | that's not the TF of the PMC servo, it's
something else. look at the gain level: -100dB.
that's not more than some crosscoupling. |
|
|
163
|
Tue Jun 15 13:36:18 2010 |
tarac | Electronics | | debugging PMC servo | From the
bode plot, something is not quite right.
I'll debug the PMC servo. My plan is |
|
|
164
|
Tue Jun 15 15:48:29 2010 |
Frank | Computing | DAQ | DAQ "no sync" problem fixed | fixed the "no sync" problem we
had since about three weeks. It was the 100pin
flat ribbon cable from the timing adapter |
|
|
165
|
Tue Jun 15 21:28:57 2010 |
Frank | Misc | PMC | PMC servo problem fixed | found the problem why the PMC servo card
wasn't working: the medm screens on the sun
workstation didn't have a toggle button for |
|
|
166
|
Wed Jun 16 00:10:36 2010 |
Frank | Computing | DAQ | new channels for temp ctrl of both cavities | some new channels for the temp ctrl of
the two cavities, most of them for debugging
purposes only |
|
|
167
|
Wed Jun 16 10:26:01 2010 |
Frank | Misc | Computers | latest medm screens from Hanford | got the latest screens from Hanford in
order to avoid such problems again in the
future. Someone has to search and replace |
|
|
168
|
Wed Jun 16 19:43:00 2010 |
tarac | Laser | PMC | PMC and EOM alignment | We try
optimizing the PMC transmission in P wave. |
|
|
169
|
Sun Jun 20 02:17:06 2010 |
rana | Electronics | RefCav | phase noise of IFR + Rubidium | see
this entry |
|
|
170
|
Mon Jun 21 19:19:12 2010 |
tarac | Laser | PMC | Progress on PSL setup: Tuning phase shift/RF power for PMC | All SMA cables for locking
RefCav are made and wired up in their places. |
|
|
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. |
|
|
172
|
Tue Jun 22 18:02:32 2010 |
Frank | Misc | RefCav | heater-to-can time constant | measured step function from heater to can
temperature. All four sensors show the same.
time constant ~7.5 hours, have to |
|
|
173
|
Wed Jun 23 03:24:30 2010 |
rana | Misc | RefCav | heater-to-can time constant | In the entry below, Frank meant to
add some commentary explaining that
he thinks this long time constant is anomalously |
|
|
174
|
Wed Jun 23 23:52:48 2010 |
tarac | Laser | RefCav | RefCav is locked and optimized | I adjust
the mode matching lenses and align the beam
so that the transmitted power is |
|
|
175
|
Thu Jun 24 09:37:16 2010 |
rana | Laser | RefCav | RefCav is locked and optimized | For the sideband power, you don't really
want to make it so large. All that you really
want is to make sure that the shot-noise |
|
|
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. |
|
|
177
|
Mon Jun 28 19:06:40 2010 |
tarac | DailyProgress | PMC | PMC acting weird | This morning,
the PMC couldn't be locked to the laser.
The FSS servo was disabled during that time. |
|
|
178
|
Tue Jun 29 11:15:40 2010 |
Frank | Notes | Foam | foam physical properties | physical
properties for the new yellow foam used for
insulation (Certifoam 25): |
|
|
179
|
Tue Jun 29 11:45:47 2010 |
Frank | HowTo | NoiseBudget | unit converter | http://www.matweb.com/tools/unitconverter.aspx |
|
|
180
|
Tue Jun 29 11:53:41 2010 |
Frank | Notes | NoiseBudget | list of emissivity coefficients | source: http://www.engineeringtoolbox.com/emissivity-coefficients-d_447.html
|
|
|
181
|
Tue Jun 29 13:22:51 2010 |
Jenne | Notes | NoiseBudget | list of emissivity coefficients |
|
|
|
182
|
Tue Jun 29 14:20:04 2010 |
tarac | Notes | Laser | Calibration [Hz/V] for modulating signal (PMC and laser) | 1) DC ext channel
on PMC servo: |
|
|
183
|
Tue Jun 29 14:22:31 2010 |
Frank | Notes | NoiseBudget | summary of emissivity coefficients for refcav experiment | emissivity
coefficients - ε -
(300K) |
|
|
184
|
Tue Jun 29 14:59:52 2010 |
Frank | Notes | NoiseBudget | better list of emissivity coefficients | source : http://www.omega.com/temperature/z/pdf/z088-089.pdf
|
|
|
185
|
Tue Jun 29 15:13:26 2010 |
Frank | Notes | RefCav | refcav physical properties | refcav physical properties from CAD
model for heat capacity calculation
volume (incl. mirrors, center |
|
|
186
|
Tue Jun 29 17:57:40 2010 |
tarac | Notes | PMC | coupling eff vs Temperature | We had a problem with power coupling
efficiency to the PMC. Sometime it |
|
|
187
|
Tue Jun 29 23:56:38 2010 |
tarac | Notes | PMC | PMC servo debugging | I
was going to check the TF on each stage of
PMC's servo. |
|
|
188
|
Wed Jun 30 00:37:49 2010 |
rana | HowTo | Computers | PMC servo debugging |
|
|
|
189
|
Wed Jun 30 00:59:13 2010 |
Frank | HowTo | Computers | PMC servo debugging |
|
|
|
190
|
Wed Jun 30 11:34:37 2010 |
Frank | HowTo | PMC | PMC fixed | the reason why you had this flickering
problem was that you had too much power on
the RFPD in reflection of the PMC. You already |
|
|
191
|
Wed Jun 30 12:31:22 2010 |
tarac | HowTo | PMC | PMC fixed |
|
|
|
192
|
Wed Jun 30 12:39:17 2010 |
Frank | HowTo | PMC | PMC fixed |
|
|
|
193
|
Wed Jun 30 15:51:05 2010 |
Frank | HowTo | NoiseBudget | view factor for two cylinders to calculate heat transfer via radiation | view factor for two cylinders to |
|
|
194
|
Wed Jun 30 23:26:27 2010 |
tarac | DailyProgress | RefCav | Debugging FSS servo+Locking RefCav | summary of this
entry |
|
|
195
|
Thu Jul 1 13:49:58 2010 |
Megan | Notes | VCO | VCO Output Amplitude Depending on Modlevel Input | I measured the output amplitude of the
VCO with different Modlevel voltage inputs
(from 0 V to 5 V) by measuring the RMS voltage |
|
|
196
|
Fri Jul 2 13:45:55 2010 |
Frank | Notes | Environment | changed lab temperature | lowered the lab temperature avout 1K to
get some data for the time constant from
the environment to the chamber over the weekend |
|
|
197
|
Wed Jul 7 01:02:06 2010 |
tara | DailyProgress | Laser | Laser driver is stationed on the electronic rack | I moved
the laser driver to the electronic rack and
it should stay there for the final setup. |
|
|
198
|
Wed Jul 7 10:44:39 2010 |
Megan | Summary | VCO | VCO Output vs Input | I redid one of the graphs for the output
of the VCO vs the input voltage to make sure
I didn't miscalculate. I got the same graph |
|
|
199
|
Wed Jul 7 15:15:59 2010 |
Megan | DailyProgress | VCO | Phase Noise Measurements | I'm currently working on measuring the
phase noise of the Marconis at 80 MHz - I
will be moving on to 160 MHz soon. I'm also |
|
|
200
|
Wed Jul 7 16:08:40 2010 |
Megan | Summary | VCO | Update on VCO offset | I realized I was doing the calculations
incorrectly - this should make more sense. |
|