Measurement of Cross-field Transport in a Magnetized Plasma Device

2008 ◽  
Author(s):  
S. Oldenbürger ◽  
N. Lemoine ◽  
F. Brochard ◽  
G. Bonhomme ◽  
Hans-Jürgen Hartfuss ◽  
...  
Keyword(s):  
Magnetized Plasma ◽  
Plasma Device

Microwave coherent backscattering from acoustic or electronic waves in a magnetized plasma

1998 ◽  
Vol 59 (1) ◽  
pp. 69-82
Author(s):  
FRANCESCA PISANI ◽  
THIÉRY PIERRE ◽  
DIMITRI BATANI
Keyword(s):  
Relative Density ◽  
Electron Density ◽  
Detection System ◽  
Spectral Width ◽  
Density Fluctuations ◽  
Magnetized Plasma ◽  
Coherent Backscattering ◽  
Electron Density Fluctuation ◽  
Scattered Power ◽  
Plasma Device

A microwave coherent backscattering experiment has been carried out on Mirabelle, a weakly ionized plasma device, with the objective of measuring the electron-density fluctuation level. The experiment is a preliminary step in order to prepare the detection system for a microwave stimulated-backscattering experiment. The incident electromagnetic wave is focused in front of a plane grid, which excites ion acoustic or electron Bernstein waves and induces fluctuations in the plasma. The backscattering signal is collected by the launching circuit and detected by homodyne mixing. The typical ratio of the scattered power to the incident power is about 10−12 and the relative density fluctuations is of the order of δne/ne ≈10−3 against a background electron density ne=(1–5)×109 cm−3. The backscattering measurement is also compared with Langmuir-probe measurements, and gives good agreement with the relative density fluctuations. The spectral width of the backscattered signal has also been studied, by taking into account effects due to the incident-wave focusing and plasma-wave damping.

Spatiotemporal structure of low frequency waves in a magnetized plasma device

2003 ◽  
Vol 314 (1-2) ◽  
pp. 163-167 ◽  
Author(s):  
M. Matsukuma ◽  
Th. Pierre ◽  
A. Escarguel ◽  
D. Guyomarc'h ◽  
G. Leclert ◽  
...  
Keyword(s):  
Low Frequency ◽  
Magnetized Plasma ◽  
Spatiotemporal Structure ◽  
Plasma Device ◽  
Low Frequency Waves

scholarly journals A platform for high-repetition-rate laser experiments on the Large Plasma Device

2018 ◽  
Vol 6 ◽  
Author(s):  
D. B. Schaeffer ◽  
L. R. Hofer ◽  
E. N. Knall ◽  
P. V. Heuer ◽  
C. G. Constantin ◽  
...  
Keyword(s):  
Los Angeles ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
Magnetized Plasma ◽  
Laboratory Astrophysics ◽  
High Repetition ◽  
Plasma Device ◽  
First Results ◽  
Laser Experiments ◽  
Large Plasma Device

We present a new experimental platform for studying laboratory astrophysics that combines a high-intensity, high-repetition-rate laser with the Large Plasma Device at the University of California, Los Angeles. To demonstrate the utility of this platform, we show the first results of volumetric, highly repeatable magnetic field and electrostatic potential measurements, along with derived quantities of electric field, charge density and current density, of the interaction between a super-Alfvénic laser-produced plasma and an ambient, magnetized plasma.

On the excitation of higher harmonic electrostatic dust cyclotron waves

2013 ◽  
Vol 79 (5) ◽  
pp. 721-726
Author(s):  
M. ROSENBERG
Keyword(s):  
Magnetic Field ◽  
Magnetized Plasma ◽  
Wave Number ◽  
Charged Dust ◽  
Plasma Parameters ◽  
Coulomb Collisions ◽  
Plasma Device ◽  
Higher Harmonic ◽  
Parameter Ranges ◽  
The Magnetic Field

AbstractIn a magnetized plasma containing charged dust whose motion is magnetized, one of the fundamental collective modes that could occur is the electrostatic dust cyclotron (EDC) wave with frequency near the dust cyclotron frequency. The EDC wave propagates nearly perpendicular to the magnetic field with a small parallel wave number, so that it can be driven unstable by ion flow along the magnetic field. Because unstable parallel wavelengths can be relatively large, this places constraints on the plasma device size. In this paper, we use linear kinetic theory to investigate the excitation of higher harmonic EDC waves that have wavelengths smaller than that of the fundamental mode. Collisions of charged particles with neutrals and Coulomb collisions including dust–dust collisions are taken into account. Constraints on possible parameter ranges arising from collisional effects or from requiring stability of other waves are discussed. Numerical results are presented for possible sets of laboratory dusty plasma parameters.

Development of very small-diameter, inductively coupled magnetized plasma device

2013 ◽  
Vol 84 (10) ◽  
pp. 103502 ◽  
Author(s):  
D. Kuwahara ◽  
A. Mishio ◽  
T. Nakagawa ◽  
S. Shinohara
Keyword(s):  
Small Diameter ◽  
Magnetized Plasma ◽  
Inductively Coupled ◽  
Plasma Device

Electron Magnetohydrodynamics Magnetic Reconnection Experiment on Keda Linear Magnetized Plasma Device

2019 ◽  
Vol 36 (1) ◽  
pp. 015201
Author(s):  
Feibin Fan ◽  
Jinlin Xie ◽  
Qiaofeng Zhang ◽  
Longlong Sang ◽  
Weixing Ding
Keyword(s):  
Magnetic Reconnection ◽  
Magnetized Plasma ◽  
Plasma Device

Electromagnetic turbulence in increased β plasmas in the Large Plasma Device

2021 ◽  
Vol 87 (4) ◽  
Author(s):  
G.D. Rossi ◽  
T.A. Carter ◽  
B. Seo ◽  
J. Robertson ◽  
M.J. Pueschel ◽  
...  
Keyword(s):  
Dynamic Pressure ◽  
Relative Magnitude ◽  
Density Fluctuations ◽  
Magnetized Plasma ◽  
Strongly Correlated ◽  
Magnetic Fluctuations ◽  
Pressure Balance ◽  
Plasma Device ◽  
Field Fluctuations ◽  
Large Plasma Device

The variation of pressure-gradient-driven turbulence with plasma $\beta$ (up to $\beta \approx 15\,\%$ ) is investigated in linear, magnetized plasma. The magnitude of magnetic fluctuations is observed to increase substantially with increasing $\beta$ . More importantly, parallel magnetic fluctuations are observed to dominate at higher $\beta$ values, with $\delta B_\parallel / \delta B_\perp \approx 2$ and $\delta B / B_0 \approx 1\,\%$ . Parallel magnetic fluctuations are strongly correlated with density fluctuations and the two are observed to be out of phase. The relative magnitude of and cross-phase between density and parallel magnetic field fluctuations are consistent with the dynamic pressure balance ( $P+{B_{0}^2}/{2\mu _0} = \textrm {constant}$ ). A local slab model theory for electromagnetic, modified drift Alfvén waves, including parallel magnetic fluctuations, shows partial agreement with experimental observations.

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