One- and two-dimensional simulations of ultra-short-pulse reflectometry

Journal Article · Tue Dec 31 23:00:00 EST 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1148224· OSTI ID:453338

Cohen, B I; Kaiser, T B; Garrison, J C ^[1]

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1. Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)

Ultra-short-pulse reflectometry is studied by means of the numerical integration of one- and two-dimensional full-wave equations for ordinary and extraordinary modes propagating in a plasma. The numerical calculations illustrate the use of the reflection of ultra-short-pulse microwaves as an effective probe of the density or magnetic profile in the presence of density or magnetic fluctuations in the plasma. Bragg resonance effects can be identified in the reflected signals, which give information on fluctuations. It is also demonstrated that ultra-short-pulse reflectometry can be used to perform correlation reflectometry measurements in which correlation lengths for density fluctuations are deduced from the observed cross-correlation function of phase shifts as a function of frequency. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Lawrence Livermore National Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 453338
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALGORITHMS
CORRELATION FUNCTIONS
FLUCTUATIONS
MAGNETIC FIELDS
MICROWAVE RADIATION
NUMERICAL SOLUTION
ONE-DIMENSIONAL CALCULATIONS
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA RADIAL PROFILES
PLASMA SIMULATION
PULSE TECHNIQUES
REFLECTIVITY
TWO-DIMENSIONAL CALCULATIONS
WAVE PROPAGATION