<RESEARCH REPORT>Electric Field Strength at the Head of a LIB Evaluated by Using a Theory of Hammer and Rostoker
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概要
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Electric fields at the head of a light ion beam propagating in a plasma are analytically investigated. It is assumed that a background plasma consists of mobile electrons and immobile ions, and the electric fields are induced through the response of the plasma electrons to a beam. A beam has a finite radius and extends from it's head to z=-∞, where z axis is taken along the beam axis. It is assumed that the beam is unaffected by the interaction with the background plasma. In the case of a beam having a density profile with zero rise time (| dn_b/dz |=∞, n_b=beam density) at the head of the beam, strong electric fields are induced in radial and axial direction. Their maximum values are order of 10^7V/m for typical parameters for LIB fusion. In the case of a beam with finite rise time (| dn_b/dz |=n_b/L=finite), electric fields are decreased by a factor v_o/(ω_pL) from the electric fields derived in the case of | dn_b/dz |=∞. Electric fields become to the order of 10V/m when L=10cm, where v_o is beam velocity and ω_p is the electron plasma frequency of the background plasma.
- 核融合科学研究所の論文
著者
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Fukano Azusa
Faculty of Science and Technology, Keio University
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Fukano Azusa
Faculty Of Science And Technology Keio University
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Ogasawara Masatada
Faculty Of Engineering Keio University
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Amamori Takuji
Faculty of Science and Technology, Keio University
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Amamori Takuji
Faculty Of Science And Technology Keio University
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- Electric Field Strength at the Head of a LIB Evaluated by Using a Theory of Hammer and Rostoker
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