摘要:

The interaction of a beam of protons of small intensity moving with velocityc&bgr; (wherecis the velocity of light) through a stationary plasma is investigated under the assumption that the beam is aligned along the direction of an impressed static magnetic field. Expressions are derived for frequencies and rates of growth characterizing the transverse waves excited by the beam and aligned along the direction parallel to that of the impressed field. It is assumed that the frequencies of the excited waves are large when compared to the proton gyrofrequency and are sufficiently high so that the motion of the plasma ions perturbed by these waves are neglected. It is shown that two waves are simultaneously excited by a beam having velocityc&bgr; <c&bgr;maxand a relationship is obtained between &bgr;maxand the parameters charaterizing the stationary plasma.

ISSN:0031-9171    

DOI:10.1063/1.1711017

出版商:AIP    

年代:1963

数据来源: AIP

摘要:

Stationary states of a collisionless plasma in a narrow axially symmetric magnetic mirror field are considered. It is shown that if the electric field vanishes identically along the magnetic field, then the angular distributions of ion and electron velocities must agree at each point. In a general case, when this condition on the distributions is not fulfilled, there is an electric field parallel with the magnetic field.

ISSN:0031-9171    

DOI:10.1063/1.1711018

出版商:AIP    

年代:1963

数据来源: AIP

摘要:

An analytic solution is obtained for the condition of laminar electrohydrodynamic flow in an annular channel. It is assumed the charged dielectric liquid has a constant density and mobility of charge, and the current density is constant across the channel. Velocity profile curves are presented.

ISSN:0031-9171    

DOI:10.1063/1.1711019

出版商:AIP    

年代:1963

数据来源: AIP

摘要:

The plasma‐sheath problem for the low‐pressure discharge in plane geometry is treated exactly, that is, with no arbitrary division into plasma and sheath regions. Numerical solutions are presented for various values of the parameter &agr;, which is of the order of the ratio of the Debye length to the discharge width for 10−3≤ &agr; ≤ 10−1; and for three assumptions regarding the ion generation rate, namely generation uniform, proportional to electron density, and proportional to the square of electron density.For the higher values of &agr;, corresponding to weak laboratory discharges, there is a smooth transition from a quasi‐neutral plasma region to a thick sheath. At the smaller values of &agr;, the conventional model of a quasi‐neutral plasma region passing rather abruptly into a narrow sheath region is substantiated. In all cases, accurate values for the potential profile throughout the plasma and sheath regions are given and compared with the separate asymptotic plasma and sheath solutions for &agr; = 0. The ion current density, wall potential, space‐charge density, mean ion energy, and sheath thickness are discussed.

ISSN:0031-9171    

DOI:10.1063/1.1711020

出版商:AIP    

年代:1963

数据来源: AIP

摘要:

Fluid equations are used to determine the drift stability of a general shearless cylindrical discharge. Arbitrary ion and electron temperatures are allowed. It is shown that a sufficiently large or small ratio of ion to electron temperature gives stability, and that, provided the azimuthal field is not too small, marginal magnetohydrodynamic stability implies drift stability.

ISSN:0031-9171    

DOI:10.1063/1.1711021

出版商:AIP    

年代:1963

数据来源: AIP

ISSN:0031-9171    

DOI:10.1063/1.1711022

出版商:AIP    

年代:1963

数据来源: AIP

ISSN:0031-9171    

DOI:10.1063/1.1711023

出版商:AIP    

年代:1963

数据来源: AIP

ISSN:0031-9171    

DOI:10.1063/1.1711024

出版商:AIP    

年代:1963

数据来源: AIP

ISSN:0031-9171    

DOI:10.1063/1.1711025

出版商:AIP    

年代:1963

数据来源: AIP

ISSN:0031-9171    

DOI:10.1063/1.1711026

出版商:AIP    

年代:1963

数据来源: AIP