| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2534
|
Wed Jan 20 20:11:56 2010 |
Alberto | Update | ABSL | Some preliminary results from measuring PRC's transmissivity for an amplitude modulated beam | Here I'm posting a plot showing a
set of measurements that I made in the past
few days to determine the absolute length |
|
|
2541
|
Fri Jan 22 02:54:06 2010 |
Alberto | Update | ABSL | Overnight measurement | I'm leaving a measurement running overnight.
It should be done in about one hour.
Tomorrow morning, If you need to |
|
|
2543
|
Fri Jan 22 14:40:49 2010 |
Alberto | Update | ABSL | Overnight measurement |
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|
|
2545
|
Mon Jan 25 16:30:37 2010 |
Alberto | Update | ABSL | 166 MHz sideband turned off | I turned off the modulation at 166MHZ
becasue I don't need it if I'm only locking
the PRC. |
|
|
2546
|
Mon Jan 25 16:46:33 2010 |
Alberto | Update | ABSL | 166 MHz sideband turned off |
|
|
|
2550
|
Wed Jan 27 11:02:30 2010 |
Alberto | Update | ABSL | PRC Cavity Length | I fitted the data from scanning
the PRC by changing the beat frequency of
the auxiliary laser beam with the PSL beam.
The |
|
|
2551
|
Thu Jan 28 09:14:51 2010 |
Alberto | Configuration | Computers | c1iscey, c1iscex, c1lsc, c1asc rebooted | This morning the LSC scripts wheren't running
properly. I had to reboot c1iscey, c1iscex,
c1lsc, c1asc . |
|
|
2552
|
Thu Jan 28 09:17:32 2010 |
Alberto | Update | LSC | 166 Modulation turned off | I temporarily turned off the 166 modulation. |
|
|
2553
|
Fri Jan 29 12:06:58 2010 |
Alberto | Update | ABSL | Measurement running today at lunch time | I just started a measuremtn that will be
running for the next hour or so. Please be
careful with the interferometer. |
|
|
2554
|
Fri Jan 29 13:14:49 2010 |
Alberto | Update | ABSL | Measurement running today at lunch time |
|
|
|
2560
|
Tue Feb 2 15:30:03 2010 |
Alberto | Frogs | Treasure | Wild Oats | FYI. Sitting on the top shelf of George
I found an opened jar of raspberry jam and
an opened jar of creamy peanut butter. Both |
|
|
2562
|
Tue Feb 2 18:15:47 2010 |
Alberto | Update | elog | Elog restarted it | Zach made me notice that the elog
had crashed earlier on this afternoon.
I just restarted it with the restarting |
|
|
2567
|
Wed Feb 3 10:46:12 2010 |
Alberto | Update | elog | elog restarted | Again, this morning Zach told me
that the elog had crashed while he was trying
to post an entry. |
|
|
2576
|
Mon Feb 8 14:13:03 2010 |
Alberto | Update | ABSL | PLL Characterization | Lately I've been trying to improve the
PLL for the AbsL experiment so that it could
handle larger frequency steps and thus speed |
|
|
2577
|
Mon Feb 8 14:56:17 2010 |
Alberto | Update | ABSL | Suddenly a much better alignment of PRC | I just aligned PRM and locked PRC and I
noticed that SPOB is much higehr than it
used to be. It's now about 1800, vs 1200 |
|
|
2579
|
Mon Feb 8 15:41:51 2010 |
Alberto | Update | ABSL | Suddenly a much better alignment of PRC |
|
|
|
2581
|
Tue Feb 9 09:07:06 2010 |
Alberto | Update | ABSL | PLL Characterization |
|
|
|
2582
|
Tue Feb 9 10:10:58 2010 |
Alberto | Update | ABSL | back to analog | I want to try to do the measurement with
the network analyzer used as local oscillator,
instead of the Marconis that I'm using now. |
|
|
2604
|
Tue Feb 16 09:51:22 2010 |
Alberto | Update | Green Locking | take some optics away from the ETM end table |
|
|
|
2605
|
Tue Feb 16 10:01:16 2010 |
Alberto | Configuration | LSC | Arms and PRC not locking | Since last Friday either the arms or the
PRC can't lock.
The montors show the beam flashing |
|
|
2608
|
Tue Feb 16 15:25:00 2010 |
Alberto | Configuration | LSC | Arms and PRC not locking |
|
|
|
2640
|
Thu Feb 25 15:49:05 2010 |
Alberto | AoG | CDS | New IO Chassis for the new CDS | Yesterday Kiwamu and I went to Downs
to take all the available parts of the IO
chassis that Gary and I had put together |
|
|
2653
|
Wed Mar 3 18:32:25 2010 |
Alberto | Update | 40m Upgrading | 11 MHz RFPD elctronics | ** Please
add LISO file w/ component values.
|
|
|
2655
|
Thu Mar 4 08:43:35 2010 |
Alberto | Update | 40m Upgrading | 11 MHz RFPD elctronics |
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|
|
2656
|
Thu Mar 4 19:53:56 2010 |
Alberto | Update | 40m Upgrading | 11MHz PD designed adjusted for diode's resistance; 55 MHz RFPD designed | After
reading this study done |
6x |
|
2680
|
Thu Mar 18 12:27:56 2010 |
Alberto | Update | ABSL | PLL reconstructed |
|
|
|
2702
|
Tue Mar 23 15:38:26 2010 |
Alberto | Update | elog | elog just restarted | I found the elog down and I restarted it.
Then, after few seconds it was down
again. Maybe someone else was messing with |
|
|
2704
|
Tue Mar 23 22:46:43 2010 |
Alberto | Update | 40m Upgrading | REFL11 upgraded | I modified REFL11 according to the changes
lsited in this
schematic (see wiki / Upgrade 09 |
|
|
2710
|
Wed Mar 24 14:52:02 2010 |
Alberto | Update | Green Locking | two NPRO PLL |
|
|
|
2711
|
Wed Mar 24 14:57:21 2010 |
Alberto | Update | 40m Upgrading | REFL11 upgraded |
Hartmut suggested a possible
explanation for the way the electronics transfer |
|
|
2715
|
Thu Mar 25 17:32:42 2010 |
Alberto | Update | 40m Upgrading | REFL55 Upgraded | I upgraded the old REFL199 to the new REFL55.
To do that I had to replace the old
photodiode inside, switching to a 2mm one. |
|
|
2732
|
Mon Mar 29 21:43:27 2010 |
Alberto | Configuration | PSL | Reference Cavity PD Noise Spectrum | [Rana, Alberto]
This evening we measured the noise
spectrum of the reference cavity PD used |
|
|
2758
|
Fri Apr 2 08:52:21 2010 |
Alberto | Update | elog | elog restarted | i just restarted the elog for the third
time in the past 12 hours.
I checked the elog.log file to debug |
|
|
2760
|
Sat Apr 3 16:07:40 2010 |
Alberto | Configuration | PSL | Reference Cavity PD Noise Spectrum | I was aware of a problem on those
units since I acquired the data. Then it
wasn't totally clear to me which were the |
|
|
2761
|
Sat Apr 3 19:54:19 2010 |
Alberto | Update | 40m Upgrading | REFL11 and REFL55 PDs Noise Spectrum | These are the dark noise spectrum that
I measured on the 11MHz and 55MHz PD prototypes
I modified. |
|
|
2763
|
Sun Apr 4 17:32:07 2010 |
Alberto | Metaphysics | General | new y-arm? |
|
|
|
2767
|
Mon Apr 5 10:23:40 2010 |
Alberto | Update | 40m Upgrading | REFL11 Low Frequency Oscilaltion Reduced | After adding an inductor L=100uH and a
resistor R=10Ohm in parallel after the OP547A
opamp that provide the bias for the photodiode |
|
|
2768
|
Mon Apr 5 10:33:12 2010 |
Alberto | Omnistructure | Electronics | soldering iron broken | This morning the pencil soldering iron
of our Weller WD2000M Soldering Station suddenly
stopped working and got cold after I turned |
|
|
2772
|
Mon Apr 5 13:52:45 2010 |
Alberto | Update | Computers | Front-ends down. Rebooted | This morning, at about 12 Koji found all
the front-ends down.
At 1:45pm rebooted ISCEX, ISCEY, |
|
|
2775
|
Tue Apr 6 11:27:11 2010 |
Alberto | Update | Computer Scripts / Programs | Data formats in the Agilent AG4395a Spectrum Analyzer | Lately I've been trying to sort out the
problem of the discrepancy that I noticed
between the values read on the spectrum analyzer's |
|
|
2776
|
Tue Apr 6 16:55:28 2010 |
Alberto | Update | Computer Scripts / Programs | Data formats in the Agilent AG4395a Spectrum Analyzer |
|
|
|
2779
|
Wed Apr 7 10:48:04 2010 |
Alberto | Update | Electronics | REFL11 Noise Simulation | LISO simulations confirm the estimate
of ~15nV for the noise of REFL11.
The
largest contribution comes from the 50Ohm |
|
|
2781
|
Wed Apr 7 11:11:19 2010 |
Alberto | Update | Electronics | REFL11 Noise Simulation |
|
|
|
2782
|
Thu Apr 8 10:17:52 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent | From the measurements of the 11 MHz RFPD
at 11Mhz I estimated a transimpedance of
about 750 Ohms. (See attached plot.) |
|
|
2783
|
Thu Apr 8 10:24:33 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
2785
|
Fri Apr 9 06:45:28 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
2786
|
Sun Apr 11 13:51:04 2010 |
Alberto | Omnistructure | Computers | Where are the laptops? | I can't find the DELL laptop anywhere in
the lab. Does anyone know where it is?
Also one of the two netbooks is missing. |
|
|
2789
|
Mon Apr 12 16:20:05 2010 |
Alberto | Configuration | 40m Upgrading | REFL55 improved | During the commissioning of the AS55
PD, I learned how to get a much better rejection
of the 11MHz modulation.
So I |
|
|
2790
|
Mon Apr 12 17:09:30 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
2834
|
Thu Apr 22 21:42:24 2010 |
Alberto | Update | PSL | Innolight 2W Vertical Beam Profile |
What kind of fit did you use?
How are the uncertainties in the parameters |
|