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The data for the following measurements is located at [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/RFsystem/RFphotodiodes/POX/ /svn/trunk/docs/upgrade08/RFsystem/RFphotodiodes/POX/] |
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| The resonance peaks at 11, 22, and 55 MHz were measured in detail and fit to a resonance curve (see below) with the following results || Resonance Frequency || Transimpedance at Resonance || Q || || (11.14 +- 0.01) MHz || (2.206 +- 0.001) kOhms || 14.58 +- 0.01 || || (22.68 +- 0.01) MHz || (9.681 +- 0.003) Ohms || 27.66 +- 0.01 || || (55.29 +- 0.01) MHz || (475 +- 2) mOhms || 31.81 +- 0.05 || === Fits To Resonance === ==== 11 MHz Resonance ==== attachment:res1.png f,,0,, = (11.14 +- 0.01) MHz Gamma = (764 +- 1) kHz R,,0,, = (8.38 +- 0.01) x 10^8^ Hz Ohms C = (11.14 +- 0.05) Ohms chi^2/ndf = 95.4 ==== 22 MHz Resonance ==== attachment:res2.png f,,0,, = (22.68 +- 0.01) MHz Gamma = (820 +- 1) kHz R,,0,, = (-5.64 +- 0.01) x 10^6^ Hz Ohms C = (23.44 +- 0.01) Ohms chi^2/ndf = 12.7 ==== 55 MHz Resonance ==== attachment:res3.png f,,0,, = (55.29 +- 0.01) MHz Gamma = (1.74 +- 0.01) MHz R,,0,, = (-9.98 +- 0.01) x 10^5^ Hz Ohms C = (1.62 +- 0.01) Ohms chi^2/ndf = 3.22 |
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| The measured dark noise was (21 +- 2) nV/rtHz. |
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| V,,d,, = (21 +- 2) nV/rtHz | Z,,RF,, = (2.07 +- 0.01) kOhms |
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| Z,,RF,, = (77 +- 3) kOhms | I,,d,, = (24.7 +- 0.6) mA |
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| chi^2^ / ndf = 0.006 | chi^2^ / ndf = 42 == RF Behavior with No Light == attachment:timeseries.png attachment:dark_spectrum.png == Picture of Photodiode == attachment:POX.jpg Picture taken on 12/13/2010. |
POX
The data for the following measurements is located at [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/RFsystem/RFphotodiodes/POX/ /svn/trunk/docs/upgrade08/RFsystem/RFphotodiodes/POX/]
RF Transimpedance
attachment:transimpedance.png
The resonance peaks at 11, 22, and 55 MHz were measured in detail and fit to a resonance curve (see below) with the following results
Resonance Frequency |
Transimpedance at Resonance |
Q |
(11.14 +- 0.01) MHz |
(2.206 +- 0.001) kOhms |
14.58 +- 0.01 |
(22.68 +- 0.01) MHz |
(9.681 +- 0.003) Ohms |
27.66 +- 0.01 |
(55.29 +- 0.01) MHz |
(475 +- 2) mOhms |
31.81 +- 0.05 |
Fits To Resonance
11 MHz Resonance
attachment:res1.png
f0 = (11.14 +- 0.01) MHz
Gamma = (764 +- 1) kHz
R0 = (8.38 +- 0.01) x 108 Hz Ohms
C = (11.14 +- 0.05) Ohms
chi^2/ndf = 95.4
22 MHz Resonance
attachment:res2.png
f0 = (22.68 +- 0.01) MHz
Gamma = (820 +- 1) kHz
R0 = (-5.64 +- 0.01) x 106 Hz Ohms
C = (23.44 +- 0.01) Ohms
chi^2/ndf = 12.7
55 MHz Resonance
attachment:res3.png
f0 = (55.29 +- 0.01) MHz
Gamma = (1.74 +- 0.01) MHz
R0 = (-9.98 +- 0.01) x 105 Hz Ohms
C = (1.62 +- 0.01) Ohms
chi^2/ndf = 3.22
Noise
attachment:noise.png
The noise data was fit to attachment:fitfunc.png with the following results:
ZRF = (2.07 +- 0.01) kOhms
Id = (24.7 +- 0.6) mA
chi2 / ndf = 42
RF Behavior with No Light
attachment:timeseries.png
attachment:dark_spectrum.png
Picture of Photodiode
attachment:POX.jpg
Picture taken on 12/13/2010.