Interaction of electromagnetic waves with a magnetized nonuniform plasma slab

• Published in: IEEE transactions on plasma science 2003-06, Vol.31 (3), p.405-410
• Main Authors: Tang, D.L., Sun, A.P., Qiu, X.M., Chu, P.K.
• Format: Article
• Language: English
• Subjects: Electromagnetic (nonlaser) radiation interactions with plasma; Electromagnetic reflection; Electromagnetic scattering; Electromagnetic wave absorption; Electromagnetic waves; Electromagnetic waves (e.g., electron-cyclotron, whistler, bernstein, upper hybrid, lower hybrid); Electromagnetic waves (eg, electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid); Electromagnetism; Exact sciences and technology; Magnetic analysis; Magnetic fields; Magnetic resonance; Mathematical models; Nonuniform plasmas; Physics; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Plasma; Plasma density; Plasma interactions (nonlaser); Plasma properties; Plasma waves; Reflection; Resonant frequency; Slabs; Strength; Waves, oscillations, and instabilities in plasmas and intense beams
• ISSN: 0093-3813; 1939-9375
• DOI: 10.1109/TPS.2003.811648

The absorption, reflection, and transmission of electromagnetic waves by a nonuniform plasma slab immersed in an ambient uniform magnetic field of various strengths are studied in this paper. The effects of the plasma parameters and magnetic field strength on the absorbed, reflected, and transmitted power are discussed. The magnetized nonuniform plasma slab is modeled by a series of magnetized uniform plasma subslabs. The calculation results show that the effects of the magnetic field strength and density gradient on the absorbed power, as well as the frequency band of resonant absorption, are significant. A complete analysis utilizing the scattering matrix method is also used to compare the above calculation results which neglect multiple reflections between subslab interfaces. Broadband absorption of electromagnetic waves can be achieved by changing the magnetic field strength and plasma density. More than 90% of the electromagnetic wave power can be absorbed in a magnetized nonuniform plasma slab with width of 12 cm and the absorption bandwidth can range from 1 to 20 GHz with different plasma parameters and external magnetic field strengths.