On the theory of positron drift in a uniform electric field

1979 ◽  
Vol 57 (10) ◽  
pp. 1667-1671 ◽  
Author(s):  
D. A. L. Paul ◽  
J. -S. Tsai
Keyword(s):  
Boundary Condition ◽  
Electric Field ◽  
Simple Formula ◽  
Uniform Electric Field ◽  
Electron Drift ◽  
Longitudinal Diffusion ◽  
Speed Distribution

The theory of electron drift and longitudinal diffusion in a uniform electric field is extended to positrons. The time- and position-dependent positron current is integrated to give a simple formula for the interpretation of positron drift experiments. The treatment is mathematically exact but neglects the transient attainment of a steady speed distribution of the positrons, and does not attempt to treat the boundary condition rigorously. These approximations are discussed, and justified under certain conditions.

scholarly journals On the Theory of the Diffusing Electron Stream in a Gas

1973 ◽  
Vol 26 (2) ◽  
pp. 135 ◽  
Author(s):  
LGH Huxley
Keyword(s):  
Boundary Condition ◽  
Electric Field ◽  
Diffusion Chamber ◽  
Uniform Electric Field ◽  
Theoretical Discussion ◽  
Longitudinal Diffusion ◽  
Electron Stream ◽  
Coefficient Of Diffusion

A theoretical discussion is presented of the structure of a stream of electrons moving through a gas under the action of a uniform electric field. The treatment incorporates the phenomenon of longitudinal diffusion in which the coefficient DL can be different from the isotropic coefficient of diffusion D. The treatment also is not restricted to the case in which the aperture through which the stream enters the diffusion chamber is small. The solution satisfies the boundary condition n = 0 at the surface of the anode and everywhere on the cathode except over the plane of the source aperture. The theory therefore provides criteria for the validity of simplified solutions employed hitherto.

scholarly journals The Effect of Diffusion on the Analysis of Pulsed Radiolysis Drift Tube Experiments

1981 ◽  
Vol 34 (6) ◽  
pp. 677 ◽  
Author(s):  
RA Cassidy
Keyword(s):  
Electric Field ◽  
Correction Factor ◽  
Drift Tube ◽  
Order Theory ◽  
Model Representation ◽  
Uniform Electric Field ◽  
Electron Drift ◽  
First Order ◽  
Plane Parallel ◽  
First Order Theory

Electron drift velocities have previously been calculated from the transient waveforms recorded with a pulsed radiolysis drift tube (PRDT) using a first order theory in which it is assumed that diffusion during the drift of the electrons to the anode effectively increases the drift distance. In this paper the modifications to the transient waveforms caused by diffusion have been analysed more accurately by using a model representation of a group of electrons drifting and diffusing in a uniform electric field between plane, parallel absorbing electrodes. It is shown that, when account is taken of loss of electrons to the electrodes by diffusion, the correction factor differs in both magnitude and sign from that assumed in the first order theory.

Bubble motion in liquid nitrogen under a non-uniform electric field in a microgravity environment

1997 ◽  
Vol 117 (11) ◽  
pp. 1109-1114
Author(s):  
Yoshiyuki Suda ◽  
Kenji Mutoh ◽  
Yosuke Sakai ◽  
Kiyotaka Matsuura ◽  
Norio Homma
Keyword(s):  
Electric Field ◽  
Liquid Nitrogen ◽  
Microgravity Environment ◽  
Uniform Electric Field ◽  
Bubble Motion

Discussion of Electrode Conditioning Mechanism Based on Pre-breakdown Current under Non-uniform Electric Field in Vacuum

2008 ◽  
Vol 128 (12) ◽  
pp. 1445-1451
Author(s):  
Takanori Yasuoka ◽  
Tomohiro Kato ◽  
Katsumi Kato ◽  
Hitoshi Okubo
Keyword(s):  
Electric Field ◽  
Uniform Electric Field

scholarly journals Field Grading Composites Tailored by Electrophoresis — Part 1: Principle and Permittivity Gradient in Uniform Electric Field

2021 ◽  
Vol 28 (2) ◽  
pp. 333-340
Author(s):  
S. Diaham ◽  
Z. Valdez-Nava ◽  
L. Leveque ◽  
T. T. Le ◽  
L. Laudebat ◽  
...  
Keyword(s):  
Electric Field ◽  
Uniform Electric Field
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