Volume 85, Number 3, February 2009
|Number of page(s)||6|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||11 February 2009|
Wavelet analysis of two-dimensional turbulence in a pure electron plasma
INFN Sezione di Milano and Dipartimento di Fisica, Università degli Studi di Milano - Via Celoria 16, Milano, I-20133, Italy, EU
2 Dipartimento di Fisica, Università di Milano-Bicocca - Piazza della Scienza 3, I-20126 Milano, Italy, EU
Corresponding author: email@example.com
Accepted: 11 January 2009
Highly magnetized pure electron plasmas confined in Penning-Malmberg traps allow to perform accurate experiments on effective two-dimensional (2D) fluid dynamics under well-controlled experimental conditions. Detailed experimental investigations of free decaying turbulence in a pure electron plasma using multi-resolution analysis (MRA) are presented. Coherent structures are extracted from the flow using a wavelet-based recursive denoising algorithm with an adaptative self-consistent threshold. The scaling behaviors of measured enstrophy and energy distributions are obtained and compared with recent experiments and theoretical predictions for 2D turbulence.
PACS: 52.35.Ra – Plasma turbulence / 42.30.-d – Imaging and optical processing / 47.27.Jv – High-Reynolds-number turbulence
© EPLA, 2009
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