Fluctuations in magnetized laboratory plasmas are ubiquitous and complex. In addition to deleterious effects, like increasing heat and particle transport in magnetic fusion energy devices, fluctuations also provide a diagnostic opportunity. Identification of a fluctuation with a particular wave or instability gives detailed information about the properties of the underlying plasma. In this work, diagnostics and spectral analysis techniques for fluctuations are developed and applied to two different laboratory plasma experiments. The first part of this dissertation discusses imaging measurements of coherent waves in the Controlled Shear Decorrelation Experiment (CSDX) at the University of California, San Diego. Visible light from ArII line e...
Localized measurements of short-scale turbulent fluctuations in tokamaks are still an outstanding pr...
We present experimental results for magnetic field fluctuations observed in an Argon plasma column p...
Chaotic and unpredictable behavior are both hallmarks of turbulence. Turbulence may be understood in...
Significant advances in microwave and millimeter wave technology have enabled the development of a n...
Numerical diagnostics using 3D simulation data are carried out to capture fluctuation properties in ...
A novel combined diagnostic capable of measuring multiscale density fluctuations that extend from ma...
International audienceHigh-speed camera imaging is a powerful tool to probe the spatiotemporal featu...
Various wave vector estimation methods like Bellan’s method, multi-phase component analysis, and k-f...
AbstractMicrowave imaging diagnostics are extremely useful for observing magnetohydrodynamic (MHD) i...
International audienceWe present the results of a statistical analysis of low-frequency fluctuations...
An experimental investigation of low frequency floating potential fluctuations (f ≤ 200 kHz) in a re...
International audienceWe present the results of a statistical analysis of low-frequency fluctuations...
A dual-frequency microwave imaging reflectometry system was commissioned to measure both coherent an...
International audienceWe present the results of a statistical analysis of low-frequency fluctuations...
JET plasmas show fluctuations from a large variety of MHD instabilities. A combination of spectral a...
Localized measurements of short-scale turbulent fluctuations in tokamaks are still an outstanding pr...
We present experimental results for magnetic field fluctuations observed in an Argon plasma column p...
Chaotic and unpredictable behavior are both hallmarks of turbulence. Turbulence may be understood in...
Significant advances in microwave and millimeter wave technology have enabled the development of a n...
Numerical diagnostics using 3D simulation data are carried out to capture fluctuation properties in ...
A novel combined diagnostic capable of measuring multiscale density fluctuations that extend from ma...
International audienceHigh-speed camera imaging is a powerful tool to probe the spatiotemporal featu...
Various wave vector estimation methods like Bellan’s method, multi-phase component analysis, and k-f...
AbstractMicrowave imaging diagnostics are extremely useful for observing magnetohydrodynamic (MHD) i...
International audienceWe present the results of a statistical analysis of low-frequency fluctuations...
An experimental investigation of low frequency floating potential fluctuations (f ≤ 200 kHz) in a re...
International audienceWe present the results of a statistical analysis of low-frequency fluctuations...
A dual-frequency microwave imaging reflectometry system was commissioned to measure both coherent an...
International audienceWe present the results of a statistical analysis of low-frequency fluctuations...
JET plasmas show fluctuations from a large variety of MHD instabilities. A combination of spectral a...
Localized measurements of short-scale turbulent fluctuations in tokamaks are still an outstanding pr...
We present experimental results for magnetic field fluctuations observed in an Argon plasma column p...
Chaotic and unpredictable behavior are both hallmarks of turbulence. Turbulence may be understood in...