Title :
Temporal evolution of micro-plasma in a repetitive vacuum arc soft x-ray source
Author :
Yanagidaira, T. ; Kotake, W. ; Miura, H. ; Tsuruta, K.
Author_Institution :
Department of Electrical and Electronic Engineering, lbaraki University, Nakanarusawa 4-12-1, Hitachi, Ibaraki, 316-8511 JAPAN
fDate :
Sept. 27 2004-Oct. 1 2004
Abstract :
Soft x-ray emission from a short vacuum gap, operated with a repetitive low-current discharge was investigated. Electrons are accelerated by an electric field in a cathode sheath that is formed after arc extinction, and soft x-rays were emitted in the period between arc extinction and subsequent breakdown. The schlieren photographs and Langmuir probe diagnostics showed that the micro plasma of diameter less than 1 mm is formed during arc phase, and the ion sheath extended with velocity of 104/m/s , which agreed with calculation. The existence time of the dense plasma was 10 - 20 ns.
Keywords :
Acceleration; Cathodes; Electron beams; Electron emission; Plasma accelerators; Plasma sheaths; Plasma temperature; Vacuum arcs; Voltage; X-ray lasers;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. XXIst International Symposium on
Conference_Location :
Yalta, Crimea
Print_ISBN :
0-7803-8461-X
DOI :
10.1109/DEIV.2004.1422675
