Perveance characteristics of intense electron beams in high power cylindrical diodes

Author

Sung, Kew Yong ; Jeon, Wook ; Chun, Seung Hun ; Song, Ki Baek ; Jung, Yoon ; Mung Chul Choi ; Seo, Yoon Ho ; Choi, Eun Ha

Author_Institution

Dept. of Electrophys., Kwangwoon Univ., Seoul, South Korea

fYear

2003

fDate

28-30 May 2003

Firstpage

184

Abstract

When an electron beam is generated from a cathode, an electron sheath plasma is also generated so that perveance of the diode is varied and changes the diode output characteristics. In our pulse power system "Chundoong" (Max 600 kV, 88 kA, 60 ns), the perveance value have been experimentally investigated and estimated from diode voltage and diode current. In this experiment, the anode- cathode (A-K) gap distance d has been varied from 4 mm to 10 mm. It is noted in this experiment that the diode perveance characteristics could be described as 7.0×10^-9/d^1.82. The sheath plasma expansion speed has also been estimated from the experiment, which is to be about 7 cm/us under A-K gap distance 4 mm.

Keywords

electron beams; plasma diodes; plasma production; plasma sheaths; 4 to 10 mm; 600 kV; Chundoong; anode-cathode gap; cathode; electron beams; electron sheath plasma; power cylindrical diodes; pulse power system; Character generation; Diodes; Electron beams; Laboratories; Particle beams; Plasma properties; Plasma sheaths; Power generation; Pulse generation; Pulse power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics, 2003 4th IEEE International Conference on

Print_ISBN

0-7803-7699-4

Type

conf

DOI

10.1109/IVEC.2003.1286229

Filename

1286229