DocumentCode :
3511907
Title :
Modeling comet ion trails
Author :
Ficht, E. ; Cartwright, K. ; Mardahl, P. ; Greenwood, A. ; Fichtl, C.
Author_Institution :
Air Force Res. Lab., USA
fYear :
2004
fDate :
1-1 July 2004
Firstpage :
426
Abstract :
Summary form only given. The goal of this paper is to model the interaction of electromagnetic (EM) waves with the ion tail of a comet using ICEPIC (Improved Concurrent Electromagnetic Particle-In-Cell) code. In order to simplify this complicated system as much as possible, a uniform, low-density, two-dimensional plasma was used. This plasma was placed in a vacuum and surrounded by PML (wave-absorbing material). The radius of the plasma was set at 2*10/sup 7/ meters (the estimated size of an actual ion tail) and the plasma was placed in the x-y plane. Initially, a plane wave generator was used to send EM waves through the plasma, with the electric field polarized in the z-direction. When a frequency sweep was run between 4 and 22 Hz and |E/sub z/| was plotted vs. frequency for specific points in the system, oscillations were observed. The most violent of these occurred on the left edge of the plasma. Three frequencies were chosen for further analysis: 4.68 Hz at a peak, 7.29 Hz at the next trough, and the intermediate frequency, 5.98 Hz.
Keywords :
astrophysical plasma; comets; plasma boundary layers; plasma electromagnetic wave propagation; plasma oscillations; 4 to 22 Hz; ICEPIC; Improved Concurrent Electromagnetic Particle-In-Cell; comet ion trails; electric field polarization; electromagnetic waves; frequency sweep; plane wave generator; plasma edge; two-dimensional plasma; wave-absorbing material; Electromagnetic forces; Electromagnetic modeling; Electromagnetic scattering; Frequency; Laboratories; Plasma density; Plasma materials processing; Plasma waves; Polarization; Tail;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. The 31st IEEE International Conference on
Conference_Location :
Baltimore, MD, USA
ISSN :
0730-9244
Print_ISBN :
0-7803-8334-6
Type :
conf
DOI :
10.1109/PLASMA.2004.1340221
Filename :
1340221
Link To Document :
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