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Title: Stimulated excitation of thermal diffusion waves in a magnetized plasma pressure filament

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/5.0061047 · OSTI ID:1826978

Results are presented from basic heat transport experiments using a magnetized electron temperature filament that behaves as a thermal resonator. Using a small cathode source, low energy electrons are injected along the magnetic field into the afterglow of a pre-existing plasma forming a hot electron filament embedded in a colder plasma. A series of low amplitude, sinusoidal perturbations are added to the cathode discharge bias that creates an oscillating heat source capable of driving large amplitude electron temperature oscillations. Langmuir probes are used to measure the amplitude and phase of the thermal wave field over a wide range of driver frequencies. The results are used to verify the excitation of thermal waves, confirm the presence of thermal resonances, and demonstrate the diagnostic potential of thermal waves through measurement of the parallel thermal diffusivity.

Sponsoring Organization:
USDOE
OSTI ID:
1826978
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 28; ISSN 1070-664X
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

References (44)

Neue Methode, das Wärmeleitungsvermögen der Körper zu bestimmen journal January 1862
Applications of ultrasensitive wavelength-modulated differential photothermal radiometry to noninvasive glucose detection in blood serum: Application of MW-DPTR to nonivasive glucose detection in blood serum journal August 2012
Thermal-wave resonant-cavity measurements of the thermal diffusivity of air: A comparison between cavity-length and modulation-frequency scans journal November 1996
Detection of Dental Secondary Caries Using Frequency-Domain Infrared Photothermal Radiometry (PTR) and Modulated Luminescence (LUM) journal October 2012
Depth Profiling of Electronic Transport Properties in $$\mathrm{H}^{+}$$ H + -Implanted n-Type Silicon journal August 2014
Complementary photothermal techniques for complete thermal characterization of porous and semi-transparent solids journal September 2014
Multiple scales in auroral plasmas journal January 2002
Drift-Alfvén fluctuations and transport in multiple interacting magnetized electron temperature filaments journal December 2019
Polar spacecraft based comparisons of intense electric fields and Poynting flux near and within the plasma sheet-tail lobe boundary to UVI images: An energy source for the aurora journal August 2000
Observations of Jovian polar auroral filaments journal April 2009
Thermal‐wave resonator cavity journal October 1995
Diffusion Waves and their Uses journal August 2000
Application of the thermal wave resonator to the measurement of the thermal diffusivity of gas mixtures journal January 2001
Langmuir probe analysis for high density plasmas journal June 2001
Simple, accurate, and precise measurements of thermal diffusivity in liquids using a thermal-wave cavity journal June 2001
Exponential frequency spectrum and Lorentzian pulses in magnetized plasmas journal December 2008
Reconstruction of radial thermal conductivity depth profile in case hardened steel rods journal April 2009
Hamiltonian plasma‐harmonic oscillator theory: Generalized depth profilometry of electronically continuously inhomogeneous semiconductors and the inverse problem journal November 1996
Generalized methodology for thermal diffusivity depth profile reconstruction in semi‐infinite and finitely thick inhomogeneous solids journal November 1996
Purely thermal-wave photopyroelectric interferometry journal June 1999
Laser induced thermal-wave fields in multi-layered spherical solids based on Green function method journal August 2012
The upgraded Large Plasma Device, a machine for studying frontier basic plasma physics journal February 2016
Transport properties of a hollow pressure filament in a magnetized plasma journal September 2016
Avalanches driven by pressure gradients in a magnetized plasma journal November 2017
Model for the operation of an emissive cathode in a large magnetized-plasma journal February 2019
Plasma flows generated by an annular thermionic cathode in a large magnetized plasma journal February 2019
Hamilton–Jacobi formulation and quantum theory of thermal wave propagation in the solid state journal October 1985
Drift-Alfvén fluctuations associated with a narrow pressure striation journal January 2000
Experimental study of classical heat transport in a magnetized plasma journal February 2000
Experimental study of fluctuations excited by a narrow temperature filament in a magnetized plasma journal May 2000
Thermal-wave slice tomography using wave-field reconstruction journal February 1994
Filamentation in the RTP tokamak plasma journal December 2000
Coherent structures and transport properties in magnetized plasmas journal November 2007
Exponential power spectra, deterministic chaos and Lorentzian pulses in plasma edge dynamics journal November 2012
Permutation entropy analysis of temperature fluctuations from a basic electron heat transport experiment journal June 2013
Driven thermal waves and determination of the thermal conductivity in a magnetized plasma journal November 2018
Spontaneous Thermal Waves in a Magnetized Plasma journal July 2008
Exponential Frequency Spectrum in Magnetized Plasmas journal August 2008
Plasma Filamentation in the Rijnhuizen Tokamak RTP journal July 1994
Observation of Simultaneous Axial and Transverse Classical Heat Transport in a Magnetized Plasma journal October 1998
Spontaneous Fluctuations of a Temperature Filament in a Magnetized Plasma journal February 2000
Understanding Langmuir probe current-voltage characteristics journal December 2007
Solar Prominences: Observations journal January 2014
Photothermal tomography for the functional and structural evaluation, and early mineral loss monitoring in bones journal January 2014

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