Accession Number : ADA307775

Title :   Linear and Reentrant CFA S for In Situ Measurements and Comparison with Numerical Simulations and Study of Noise Mechanisms.

Descriptive Note : Final rept. 30 Sep 91-29 Sep 95,

Corporate Author : NORTHEASTERN UNIV BOSTON MA

Personal Author(s) : Chan,

PDF Url : ADA307775

Report Date : 29 SEP 1995

Pagination or Media Count : 28

Abstract : We have performed in situ measurements in two low frequency CFAs to study several basic physics issues which may lead to CFA noise reduction. Our measurements include the local radio-frequency (RF) fields, electron density profiles, electron energy distributions and noise spectrums in both the linear CFA and the reentrant CFA. Comprehensive electron density measurements of the interaction region as well as parametric comparisons such as gain versus sole voltage, beam current and frequency have been used to benchmark two computer simulation codes, MASK and NESSP.

Descriptors :   *NOISE REDUCTION, *LOW NOISE AMPLIFIERS, *CROSSED FIELD DEVICES, MATHEMATICAL MODELS, MEASUREMENT, DISTRIBUTION, INTERACTIONS, ELECTRON DENSITY, NUMERICAL ANALYSIS, ELECTRONS, ELECTRON ENERGY, SPECTRA, PROFILES, PHYSICS, NOISE, RADIOFREQUENCY, LOW FREQUENCY.

Subject Categories : Electrical and Electronic Equipment
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE