| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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2620
|
Sun Feb 21 17:44:35 2010 |
rana | Update | General | Prep for Power Supply Stop | [LIST]
[*] Turned on the RAID attached to linux1
(its our /cvs/cds disk)
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2621
|
Mon Feb 22 07:25:58 2010 |
rana | Update | General | Prep for Power Supply Stop | Autoburts have not been |
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2634
|
Tue Feb 23 16:42:02 2010 |
rana | Configuration | Computer Scripts / Programs | SVN restarted on NODUS | I ran the start Apache script as described
by Yoichi in the WIki. SVN back up. |
|
|
2645
|
Sun Feb 28 16:45:05 2010 |
rana | Summary | General | Power ON Recovery |
Turned ON the RAID above linux1.
Hooked up a monitor and keyboard and
then turned ON linux1.
After |
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2646
|
Sun Feb 28 23:47:52 2010 |
rana | Update | Computers | rosalba | Since Rosalba wanted to update ~500
packages, I let it do it. This, of course,
stopped the X server from running. I downloaded |
|
|
2649
|
Mon Mar 1 22:38:12 2010 |
rana | Update | Computers | RC sensitivity to RIN | The overnight triangle wave I ran on the
AOM drive turns out to have produced no signal
in the FAST feedback to the PZT. |
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|
2657
|
Thu Mar 4 22:07:21 2010 |
rana | Update | 40m Upgrading | 11MHz PD not yet designed | Use 10 Ohms for the resistance - I have
never seen a diode with 25 Ohms.
p.s. PDFs can be joined together |
|
|
2659
|
Fri Mar 5 18:04:56 2010 |
rana | Update | SUS | used OSEMs are magnetic | The OSEM LEDs and PDs from Honeywell have
always had some ferromagnetic material in
them. These are the same OSEMs we had since |
|
|
2660
|
Sun Mar 7 07:01:21 2010 |
rana | Update | WienerFiltering | Guralp Huddle Test software | We need to do a new huddle test of the
Guralps for the Wiener filtering paper. The
last test had miserable results. |
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|
2661
|
Sun Mar 7 23:05:39 2010 |
rana | Update | PEM | Seismic witnesses near MC1 tank moved |
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2662
|
Mon Mar 8 18:15:27 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | I put Jenne's
cooler over the seismometers |
|
|
2666
|
Wed Mar 10 15:02:58 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | This is the spectra and coherence from
a quiet time last night. I've lowered the
Guralp cal by a factor of 2 to account for |
|
|
2671
|
Sat Mar 13 21:30:22 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | |
|
|
2672
|
Sat Mar 13 22:16:03 2010 |
rana | Update | WienerFiltering | Guralp Huddle Test software | I used some recent better data to try for
better Z subtraction.
Dmass helped me understand that sqrt(1-Coherence) |
|
|
2686
|
Fri Mar 19 21:15:33 2010 |
rana | Update | PEM | Guralp2 centered again | This trend of the last 200 days shows that
GUR2 has been bad forever...until now anyways.
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|
|
2687
|
Fri Mar 19 23:03:41 2010 |
rana | Update | PEM | Guralp2 centered again | I went and double-checked and aligned the
styrofoam cooler at ~5:00 UTC. It was fine,
but we really need a better huddling box. |
|
|
2689
|
Sun Mar 21 19:25:29 2010 |
rana | Update | PEM | Guralp2 centered again | From this morning, now in calibrated units,
and with the Güralp self noise spec
from the Güralp manual. |
|
|
2692
|
Mon Mar 22 02:03:57 2010 |
rana | Summary | Electronics | UPDH Box #17: Ready | It took too long to get this box ready
for action. I implemented all of the changes
that I made on the previous one (#1437). |
|
|
2719
|
Sun Mar 28 20:00:17 2010 |
rana | Update | Cameras | GigE camera no work from screen | Not that this is an urgent concern, just
a data point which shows that it doesn't
just not work at the sites. |
|
|
2720
|
Sun Mar 28 20:05:33 2010 |
rana | Summary | PSL | FSS Work from Sunday: AOM/VCO level set wrong | Just before working on the FSS today, I
noticed that the VCO RF output level was
set incorrectly. |
|
|
2721
|
Sun Mar 28 20:51:31 2010 |
rana | Summary | PSL | FSS Work from Sunday: Cavity Suspension is Ridiculously Undamped! | What
is the Transfer Function of the suspension |
|
|
2722
|
Sun Mar 28 23:17:46 2010 |
rana | Summary | PSL | FSS Work from Sunday: noise spec | This is the error point spectrum - it is
filled with huge multiples of ~75 kHz as
Yoichi noticed a couple years ago. |
|
|
2723
|
Sun Mar 28 23:47:47 2010 |
rana | Summary | PSL | FSS Work from Sunday: Open Loop Gain | I measured the open loop gain of the FSS
(as usual, I have multiplied the whole OLG
by 10dB to account for the forward loop gain |
|
|
2724
|
Mon Mar 29 01:11:33 2010 |
rana | Summary | PSL | FSS Work from Sunday: RF Out Spectrum | I measured the RF spectrum coming out
the FSS RFPD to look for saturations - its
close to the hairy edge. This is with |
|
|
2733
|
Tue Mar 30 06:37:32 2010 |
rana | Configuration | PSL | Reference Cavity PD Noise Spectrum | Some more words about the RFAM: I noticed
that there was an excess RFAM by unlocking
the RC and just looking at the RF out with |
|
|
2741
|
Wed Mar 31 12:30:31 2010 |
rana | Update | Green Locking | frequency counter for green PLL | Its a good measurement - you should adjust
the input range of the 620 using the front
panel 'scale' buttons to see how the noise |
|
|
2750
|
Thu Apr 1 12:07:22 2010 |
rana | Update | General | PZT response for the innolight | The Lightwave NPRO |
|
|
2751
|
Thu Apr 1 15:21:12 2010 |
rana | Update | Green Locking | frequency counter for green PLL |
|
|
|
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 |
|
|
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 |
|
|
2805
|
Mon Apr 19 05:54:50 2010 |
rana | Configuration | PSL | RC Temperature Servo Turned OFF temporarily | In order to measure the transfer function
of the RC cavity's foam, I've turned off
the servo so that the room temperature noise |
|
|
2806
|
Mon Apr 19 07:38:07 2010 |
rana | HowTo | Electronics | Repair and Calibration of SR560: s/n 59650 | Frank noticed that this particular SR560
had an offset on the output which was unzeroable
by the usual method of tuning the trim pot |
|
|
2829
|
Wed Apr 21 22:11:48 2010 |
rana | Update | PSL | Innolight 2W Vertical Beam Profile | Back in Gainesville in 1997, I learned
how to do this using the chopper wheel. |
|
|
2839
|
Sun Apr 25 02:56:07 2010 |
rana | Update | LSC | Started dev of LSC FE | LSC
Plant Model. That is all. |
|
|
2865
|
Sun May 2 15:38:12 2010 |
rana | Summary | SUS | Coil Actuator Balancing and Spot Position |
Oh, but it gets even better: in order
to trust the A2L script in this regard you |
|
|
2869
|
Mon May 3 01:16:50 2010 |
rana | HowTo | Electronics | Marconi phase noise measurement setup | To try the 3-corner hat method
on the Marconis, I started to set up the |
|
|
2873
|
Mon May 3 17:49:41 2010 |
rana | Configuration | PSL | RC Temperature Servo Turned OFF temporarily |
|
|
|
2875
|
Tue May 4 02:28:38 2010 |
rana | Configuration | PSL | RC Temperature Servo Turned OFF temporarily |
My attempt to passively measure |
|
|
2879
|
Tue May 4 18:40:27 2010 |
rana | HowTo | Electronics | Marconi phase noise measurement setup | To check the UGF, I increased the gain
of the PLL by 10 and looked at how much the
error point got suppressed. The green trace |
|
|
2881
|
Wed May 5 02:37:55 2010 |
rana | Configuration | PSL | RC Temperature Servo Turned OFF temporarily |
|
|
|
2890
|
Thu May 6 18:43:58 2010 |
rana | Update | PEM | Noise floor of the Ranger Seismometer | I
added a noise model of the SR560 to the LISO
opamp.lib. This assumes you're |
|
|
2897
|
Fri May 7 19:02:27 2010 |
rana | Update | 40m Upgrading | New improved design for the 11MHz photodiode | To measure the width of a resonance, the
standard method is to state the center frequency
and the Q. Use the definition of Q from the |
|
|
2901
|
Sun May 9 20:02:23 2010 |
rana | Configuration | SUS | SUS filters deleted again to reduce CPU load on c1susvme2 again | On Friday, I deleted a bunch of filters
from the c1susvme2 optics' screens (MC1,2,3
+ SRM) so as to reduce the CPU load and keep |
|
|
2904
|
Mon May 10 18:56:53 2010 |
rana | Update | Electronics | Unexpected oscilaltionin the POY11 PD | Where did you get the 55nH based notch
from? I don't remember anything like that
from the other LSC PD schematics. This is |
|
|
2905
|
Mon May 10 19:09:45 2010 |
rana | Update | Electronics | Unexpected oscilaltionin the POY11 PD |
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2913
|
Tue May 11 18:58:49 2010 |
rana | HowTo | Electronics | Marconi phase noise measurement setup | Just a little while ago, at 2330 UTC on
5/11, I swapped the phase noise setup to
use another Marconi - this time its the 3rd |
|
|
2914
|
Wed May 12 02:21:56 2010 |
rana | HowTo | Electronics | Marconi phase noise measurement setup | Finally got the 3-cornered-hat measurement
of the IFRs done. The result is attached.
|
|
|
2926
|
Thu May 13 05:06:43 2010 |
rana | Update | 40m Upgrading | 216 MHz resonance in the POY11 PD killed |
This idea was tried before
by Dale in the ~1998 generation of PDs. Its |
|
|
2973
|
Mon May 24 10:03:14 2010 |
rana | Update | LSC | 40mUpgrade Field Power and RF Power Spectrum at the ports. 38m/38.55m arm length issue. |
If you have a working 40m Optickle
model, put it in a common place in the SVN, |
|
|
2974
|
Mon May 24 11:32:05 2010 |
rana | Update | LSC | 40mUpgrade Field Power and RF Power Spectrum at the ports. 38m/38.55m arm length issue. |
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