Relativistic solutions for one- and two-dimensional space-charge limited current in coaxial diode

Journal Article · Wed May 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4804403· OSTI ID:22218630

Yang, Zhanfeng ^[1]; Liu, Guozhi ^[2]; Shao, Hao; Yan, Teng; Zhang, Yuchuan ^[2]

---

1. Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049 (China)
2. Northwest Institute of Nuclear Technology, P. O. Box 69-13, Xi'an 710024 (China)

This paper reports the two-dimensional physics and space-charge limited current (SLC) of coaxial diodes with a finite-length emitter. A full-voltage and one-dimensional approximate solution is first obtained by matching the non-relativistic solution to the super-relativistic solution. Including the effects of fields induced by the anode current and the beam itself yields the pinch-limited current in the coaxial diode. The SLC of a practically applied coaxial diode with a finite length emitter is obtained by a semi-analytical method. The solutions well agree with numerical solutions and particle-in-cell simulations.

• OSTI ID: 22218630
• Journal Information: Physics of Plasmas, Vol. 20, Issue 5; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANODES
APPROXIMATIONS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
NUMERICAL SOLUTION
ONE-DIMENSIONAL CALCULATIONS
PINCH EFFECT
PLASMA SIMULATION
RELATIVISTIC PLASMA
SPACE CHARGE
THERMIONIC DIODES
TWO-DIMENSIONAL CALCULATIONS