|
Size: 1701
Comment:
|
Size: 2042
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 18: | Line 18: |
| More detailed transfer functions were measured around the resonance peaks at 11, 22, and 55 MHz. These transfer functions were fit to attachment:resfitfunc.png where ''f'',,0,, is the resonance frequency and ''Gamma'' is the line width. ''Q'' is calculated by ''f'',,0,,/''Gamma''. |
|
| Line 22: | Line 24: |
| f,,0,, = (11.14 +- 0.01) MHz | ''f'',,0,, = (11.14 +- 0.01) MHz |
| Line 24: | Line 26: |
| Gamma = (764 +- 1) kHz | ''Gamma'' = (764 +- 1) kHz |
| Line 26: | Line 28: |
| R,,0,, = (8.38 +- 0.01) x 10^8^ Hz Ohms | ''R'',,0,, = (8.38 +- 0.01) x 10^8^ Hz Ohms |
| Line 28: | Line 30: |
| C = (11.14 +- 0.05) Ohms | ''C'' = (11.14 +- 0.05) Ohms |
| Line 36: | Line 38: |
| f,,0,, = (22.68 +- 0.01) MHz | ''f'',,0,, = (22.68 +- 0.01) MHz |
| Line 38: | Line 40: |
| Gamma = (820 +- 1) kHz | ''Gamma'' = (820 +- 1) kHz |
| Line 40: | Line 42: |
| R,,0,, = (-5.64 +- 0.01) x 10^6^ Hz Ohms | ''R'',,0,, = (-5.64 +- 0.01) x 10^6^ Hz Ohms |
| Line 42: | Line 44: |
| C = (23.44 +- 0.01) Ohms | ''C'' = (23.44 +- 0.01) Ohms |
| Line 50: | Line 52: |
| f,,0,, = (55.29 +- 0.01) MHz | ''f'',,0,, = (55.29 +- 0.01) MHz |
| Line 52: | Line 54: |
| Gamma = (1.74 +- 0.01) MHz | ''Gamma'' = (1.74 +- 0.01) MHz |
| Line 54: | Line 56: |
| R,,0,, = (-9.98 +- 0.01) x 10^5^ Hz Ohms | ''R'',,0,, = (-9.98 +- 0.01) x 10^5^ Hz Ohms |
| Line 56: | Line 58: |
| C = (1.62 +- 0.01) Ohms | ''C'' = (1.62 +- 0.01) Ohms |
| Line 66: | Line 68: |
| Z,,RF,, = (2.07 +- 0.01) kOhms | ''Z'',,RF,, = (2.07 +- 0.01) kOhms |
| Line 68: | Line 70: |
| I,,d,, = (24.7 +- 0.6) mA | ''I'',,d,, = (24.7 +- 0.6) mA |
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
More detailed transfer functions were measured around the resonance peaks at 11, 22, and 55 MHz. These transfer functions were fit to attachment:resfitfunc.png where f0 is the resonance frequency and Gamma is the line width. Q is calculated by f0/Gamma.
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.