| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2802
|
Fri Apr 16 17:26:23 2010 |
Jenne | Update | PEM | Guralp Breakout Box pulled | I
pulled the Guralp breakout box from the rack,
and it's sitting on the EE bench here. |
|
|
2801
|
Thu Apr 15 14:47:28 2010 |
steve | Update | Electronics | 25MHZ oscillation of HP4195A | The 1979 vintage RF spectrum analyzer HP4195A
sn2904J01587 shipped out for repair
today to http://www.avalontest.com |
|
|
2800
|
Tue Apr 13 20:02:02 2010 |
Koji | Update | SUS | BS chamber opened, PRM/SRM SOS removed from the table | Bob, Steve, and Koji
We
opened North heavy door of the BS chamber |
|
|
2799
|
Tue Apr 13 19:53:06 2010 |
Mott | Update | Green Locking | PZT response for the innolight and lightwave |
I redid the PZT Phase Modulation
measurement out to 5 MHz for both the Innolight |
6x |
|
2798
|
Tue Apr 13 12:49:35 2010 |
josephb | Update | Computers | Y end simulated plant progress |
|
|
|
2797
|
Tue Apr 13 12:39:51 2010 |
Aidan, Mott | Summary | Green Locking | Temperature sweep of the Innolight: df/dT ~ 3.3GHz/K | Please put those numbers onto wiki somewhere
at the green page or laser characterization
page. |
|
|
2796
|
Mon Apr 12 22:51:31 2010 |
Koji | Update | SUS | ITMX installed and aligned | Koji
ITMX
was aligned |
|
|
2795
|
Mon Apr 12 22:44:30 2010 |
Koji | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent | Data looks perfect ... but the fitting
was wrong.
Vn = Vdn + Z * sqrt( 2 e Idc ) |
|
|
2794
|
Mon Apr 12 20:48:51 2010 |
Aidan, Mott | Summary | Green Locking | Temperature sweep of the Innolight: df/dT ~ 3.3GHz/K |
|
|
|
2793
|
Mon Apr 12 19:50:30 2010 |
Aidan | Summary | Green Locking | Temperature sweep of the Lightwave: df/dT = 2.8GHz/K | The beams from the Innolight and Lightwave
NPROs were both incident on a 1GHZ New Focus
PD. Mott and I swept the temperature of the |
|
|
2792
|
Mon Apr 12 17:48:32 2010 |
Aidan | Update | Computer Scripts / Programs | elog restarted | The elog crashed when I was uploading
a photo just now. I logged into nodus and
restarted it. |
|
|
2791
|
Mon Apr 12 17:37:52 2010 |
josephb | Update | Computers | Y end simulated plant progress | Currently, the y end plant is yep.mdl.
In order to compile it |
|
|
2790
|
Mon Apr 12 17:09:30 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
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 |
|
|
2788
|
Mon Apr 12 14:20:10 2010 |
kiwamu | Update | Green Locking | PZT response for the innolight | I measured a
jitter modulation caused by |
|
|
2787
|
Sun Apr 11 19:05:34 2010 |
Koji | Omnistructure | Computers | Where are the laptops? | One dell is in the clean room for the suspension
work.
|
|
|
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. |
|
|
2785
|
Fri Apr 9 06:45:28 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
2784
|
Thu Apr 8 20:53:13 2010 |
Koji | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent | Something must be wrong.
1. Physical Unit is wrong for the
second term of "Vn = Vdn + Sqrt(2 e |
|
|
2783
|
Thu Apr 8 10:24:33 2010 |
Alberto | Update | 40m Upgrading | REFL11 Noise Vs Photocurrent |
|
|
|
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.) |
|
|
2781
|
Wed Apr 7 11:11:19 2010 |
Alberto | Update | Electronics | REFL11 Noise Simulation |
|
|
|
2780
|
Wed Apr 7 10:58:15 2010 |
Koji | Update | Electronics | REFL11 Noise Simulation | What??? I don't see any gray trace
of Rs in the plot. What are you talking about?
Anyway, if you are true, the circuit |
|
|
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 |
|
|
2778
|
Wed Apr 7 09:00:01 2010 |
steve | HowTo | PEM | prepare to open chamber | In order to minimize the diffusion of more
dust particles into the vented IFO vacuum
envelope |
|
|
2777
|
Tue Apr 6 22:54:34 2010 |
Koji | Update | SUS | ITMY (south) aligned | Kiwamu and Koji
ITMY
(south) was aligned |
|
|
2776
|
Tue Apr 6 16:55:28 2010 |
Alberto | Update | Computer Scripts / Programs | Data formats in the Agilent AG4395a Spectrum Analyzer |
|
|
|
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 |
|
|
2773
|
Mon Apr 5 14:10:06 2010 |
steve | Update | SUS | sus damping restored |
|
|
|
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, |
|
|
2771
|
Mon Apr 5 13:20:16 2010 |
Koji | Omnistructure | Electronics | soldering iron broken | Albeto and Koji
We took the tip replacement from
the blue tower. |
|
|
2770
|
Mon Apr 5 13:07:36 2010 |
Jenne | Omnistructure | Electronics | soldering iron broken |
|
|
|
2769
|
Mon Apr 5 11:39:41 2010 |
steve | Update | SUS | ITM-south installation |
|
|
|
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 |
|
|
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 |
|
|
2766
|
Mon Apr 5 09:48:57 2010 |
Koji | Update | SUS | ITMs placed on the tables in the chambers | Steve and Koji (Friday, Apr 02)
Summary
Intsallation of ITMs are going on. |
|
|
2765
|
Mon Apr 5 08:43:48 2010 |
steve | Update | PEM | earthquake mag 7.2 | Large
earthquake shakes Baja California, Mexico
and 6 over Magnitude 5 aftershakes follow. |
|
|
2764
|
Mon Apr 5 01:02:07 2010 |
rana | Update | PEM | Guralp interface box turned off | I was
checking into the Guralp situation today.
I put the rubber balls underneath the granite |
|
|
2763
|
Sun Apr 4 17:32:07 2010 |
Alberto | Metaphysics | General | new y-arm? |
|
|
|
2762
|
Sun Apr 4 00:21:42 2010 |
rana, koji | Summary | Electronics | Checkout of EG&G (PARC) preamp model #113, s/n 49135 | We tested out the functionality of the
EG&G 113 preamp that I found in one of
the cabinets. This is one of the ancestors |
|
|
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. |
|
|
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 |
|
|
2759
|
Sat Apr 3 11:35:47 2010 |
rana | Configuration | PSL | Reference Cavity PD Noise Spectrum | The units on this
plot are completely bogus - we know that
the thermal noise from the resonant part |
|
|
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 |
|
|
2757
|
Thu Apr 1 20:29:02 2010 |
Hartmut | Update | Green Locking | simple PD test circuit | I made a simple PD test circuit which may
allow to test PD response up to few 100MHz.
Its not for low noise, only for characterising |
|
|
2756
|
Thu Apr 1 19:59:32 2010 |
Mott | Update | General | PZT response for the innolight |
We measured the Amplitude Modulation
response of the PZTs, to find regions with |
|
|
2755
|
Thu Apr 1 18:44:40 2010 |
Koji | Update | General | PZT response for the innolight | Innolight 10 rad/V @ 100kHz => 1e6/f
rad/V => 1MHz/V
LWE 30 rad/V @ 100kHz => 3e6/f |
|
|
2754
|
Thu Apr 1 18:05:29 2010 |
Mott | Update | General | PZT response for the innolight |
We realized that we had measured
the wrong calibration value; we were using |
|
|
2753
|
Thu Apr 1 17:35:24 2010 |
Koji | Update | SUS | Working on ITMX/Y | Steve and Koji
- We removed old ITMX/Y from the
chambers. Now they are temporarily placed |
|
|
2752
|
Thu Apr 1 16:34:29 2010 |
Hartmut | Update | Green Locking | Silicon PDs | just a few infos on Silicon PDs I looked
up.
If you want to go beyond the 100MHz |
|