1. Drift waves and chaos in a LAPTAG plasma physics experiment.
- Author
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Gekelman, Walter, Pribyl, Patrick, Birge-Lee, Henry, Wise, Joe, Katz, Cami, Wolman, Ben, Baker, Bob, Marmie, Ken, Patankar, Vedang, Bridges, Gabriel, Buckley-Bonanno, Samuel, Buckley, Susan, Ge, Andrew, and Thomas, Sam
- Subjects
DRIFT waves ,WAVES (Physics) ,PLASMA drift waves ,PHYSICAL sciences ,PHYSICAL sciences research - Abstract
In a project involving an alliance between universities and high schools, a magnetized plasma column with a steep pressure gradient was established in an experimental device. A two-dimensional probe measured fluctuations in the plasma column in a plane transverse to the background magnetic field. Correlation techniques determined that the fluctuations were that of electrostatic drift waves. The time series data were used to generate the Bandt-Pompe entropy and Jensen-Shannon complexity for the data. These quantities, when plotted against one another, revealed that a combination of drift waves and other background fluctuations were a deterministically chaotic system. Our analysis can be used to tell the difference between deterministic chaos and random noise, making it a potentially useful technique in nonlinear dynamics. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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