Title :
Perveance and sheath plasma expansion characteristics in high power cylindrical diode
Author :
Sung, Kew Yong ; Jeon, Wook ; Chun, Seung Hun ; Choi, Eun Ha ; Uhm, Han S.
Author_Institution :
Dept. of Electrophys., Kwangwoon Univ., Seoul, South Korea
Abstract :
Perveance and sheath plasma expansion characteristics for high power electron beams have been experimentally investigated in a cylindrical diode. An experimental scaling law for perveance in high power cylindrical diodes have been obtained in terms of anode-cathode (A-K) gap distance, d. It is found that the diode perveance in a high power cylindrical diode has a scaling law of /spl sim/d/sup -1.83/ in terms of the A-K gap distance, d, which is in close agreement with that of /spl sim/d/sup -2/ for infinite planar diode. It is also noted in high power cylindrical diode that the sheath plasma expansion speed is about 7 cm//spl mu/s at A-K gap distance of 4 mm, which is about two times faster than that in high power axial diode, in this experiment.
Keywords :
plasma diodes; plasma sheaths; 4 mm; anode-cathode gap distance; diode perveance; high power cylindrical diode; high power electron beams; infinite planar diode; scaling law; sheath plasma expansion characteristics; Cathodes; Coaxial components; Diodes; Electron beams; High power microwave generation; Nuclear and plasma sciences; Plasma properties; Plasma sheaths; Space charge; Voltage;
Conference_Titel :
Pulsed Power Conference, 2003. Digest of Technical Papers. PPC-2003. 14th IEEE International
Conference_Location :
Dallas, TX, USA
Print_ISBN :
0-7803-7915-2
DOI :
10.1109/PPC.2003.1277980
