Proper Orthogonal Decomposition of two-dimensional turbulence in a pure electron plasma

被引：0

作者：

Lepreti, F. ^{[1
,2
]}

Rome, M. ^{[3
,4
]}

Pozzoli, R. ^{[3
]}

Vecchio, A. ^{[1
,2
]}

Carbone, V. ^{[1
,5
]}

Maero, G. ^{[3
,4
]}

Paroli, B. ^{[3
,4
]}

Valentini, F. ^{[1
]}

机构：

[1] Univ Calabria, Dipartimento Fis, Ponte P Bucci 31-C, I-87036 Arcavacata Di Rende, CS, Italy

[2] CNISM Unita Cosenza, I-87036 Arcavacata Di Rende, CS, Italy

[3] Univ Milan, INFN Sez Milano, I-20133 Milan, Italy

[4] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[5] Univ Calabria, CNR, INFM, LiCryl, I-87036 Arcavacata Di Rende, Italy

来源：

PLASMAS IN THE LABORATORY AND IN THE UNIVERSE: INTERACTIONS, PATTERNS, AND TURBULENCE | 2010年 / 1242卷

关键词：

Turbulence; Electron plasma; Coherent structures;

D O I：

10.1063/1.3460139

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The free-decaying two-dimensional (2D) turbulence in a pure electron plasma confined in the Malmberg-Penning trap ELTRAP is investigated experimentally and analyzed through the Proper Orthogonal Decomposition (POD). POD is used to extract coherent structures of the flow from a sequence of plasma density measurements, which represent the vorticity of the 2D fluid. The coherent structures that are energetically dominant are identified and their spatio-temporal dynamics is studied over the time evolution of turbulence. The results suggests the the dominant POD modes can be identified with diocotron modes which appear to be active during both the onset and relaxation phases of turbulence.

引用

页码：306 / +

页数：2

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