Title :
High-density plasma low energy electron gun based on vacuum arc in a strong magnetic field
Author :
Bugaev, A.S. ; Gushenets, V.I. ; Khuzeev, Yu.A. ; Oks, E.M. ; Yushkov, G. Yu
Author_Institution :
Inst. of High-Current Electron., Acad. of Sci., Tomsk, Russia
Abstract :
This paper presents the results of a study of a plasma-emitter electron gun based on an arc discharge operating in the cathode material vapor in a strong magnetic field. With an accelerating voltage of up to 20 kV and a pressure of the order of 10-6 Torr a 70 A electron beam with an emission current of 40 A/cm2 and a pulse duration of 100 μs has been produced. Using an external magnetic field, compression of the electron beam in the transportation channel filled with plasma has been accomplished and a current density of 140 A/cm2 has been achieved with a beam diameter of 0.8 cm. The current passage efficiency was ~90%
Keywords :
cathodes; current density; electron beams; electron emission; electron guns; magnetic fields; plasma guns; vacuum arcs; 0.8 cm; 100 mus; 10E-6 torr; 20 kV; 70 A; 90 percent; arc discharge; cathode material vapor; current density; current passage efficiency; electron beam compression; emission current; external magnetic field; high-density plasma low energy electron gun; plasma-emitter electron gun; pulse duration; strong magnetic field; transportation channel; vacuum arc; vacuum arcs; Acceleration; Arc discharges; Cathodes; Electron beams; Elementary particle vacuum; Magnetic fields; Magnetic materials; Plasma accelerators; Plasma materials processing; Vacuum arcs;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2000. Proceedings. ISDEIV. XIXth International Symposium on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5791-4
DOI :
10.1109/DEIV.2000.879068
