Avalanche photodiodes operating parameter optimization for the Frascati Tokamak Upgrade Thomson scattering system

Journal Article · Sat Feb 01 00:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147903· OSTI ID:450588

Orsitto, F; Brusadin, A; Giovannozzi, E ^[1]

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1. Associazione Euratom ENEA sulla fusione, C.R. Frascati, C.P. 65-00044 Frascati, Rome (Italy)

Measured figures (linearity, avalanche gain, frequency response, and noise) of the avalanche photodiodes (APD) detectors used on the FTU Thomson scattering system (FTU-TS) are reported. This investigation on the APD figures is motivated by the necessity of knowing their values over a wide range of input signals, and also of checking the validity of McIntyre model of APD noise, since using this model the experimental signal-to-noise ratio is calculated. From the noise analysis, a method of optimization of the detection system sensitivity is derived, leading to the optimization of the signal-to-noise ratio over the entire FTU-TS system. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 450588
• Journal Information: Review of Scientific Instruments, Vol. 68, Issue 2; Other Information: PBD: Feb 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TOKAMAK DEVICES
PLASMA DIAGNOSTICS
THOMSON SCATTERING
PHOTODIODES
PERFORMANCE
OPTIMIZATION
LIGHT SCATTERING
PHOTODETECTORS
AVALANCHE QUENCHING
GAIN
TESTING
NOISE
OPERATION
SIGNAL-TO-NOISE RATIO
SENSITIVITY
LASER RADIATION
MAGNETIC CONFINEMENT
FREQUENCY DEPENDENCE
ELECTRONIC CIRCUITS