Title :
Laser-induced vacuum discharge as a source of hard X-ray radiation
Author :
Romanov, Igor V. ; Gupta, Parshotam D. ; Khan, Riyaz A. ; Korobkin, Yuriy V. ; Kumbhare, Sudhakar R. ; Moorti, Anand ; Naik, Prasad A. ; Rupasov, Alexander A. ; Shikanov, Andrei S.
Author_Institution :
P.N. Lebedev Phys. Inst., Moscow, Russia
Abstract :
The features of dynamics of fast laser-induced vacuum discharge with a rather small values of amplitude of current (≤ 10 kA), as well as the voltage and energy of the capacitor bank (≤20 k V and 20 J accordingly) are investigated depending on conditions of their initiation. Two various types beam-plasma instability are revealed. It is found that the first of them are realized at the initial stage of the discharge and is caused by a pinch structure presence in front of a cathode jet extending in vacuum. The second one arises at the top or recession of the current and is accompanied by the generation hard (the energy ≤100 ke V) Bremsstrahlung radiation from the anode area. Excess of the energy hard components of radiation over the potential of the current source is associated with the effects plasma - erosive disconnection.
Keywords :
X-ray lasers; bremsstrahlung; discharges (electric); pinch effect; plasma X-ray sources; plasma instability; plasma jets; plasma sources; plasma transport processes; Bremsstrahlung radiation; anode area; beam-plasma instability; capacitor bank; cathode jet; current source; energy hard components; hard X-ray radiation; laser-induced vacuum discharge; pinch structure; plasma-erosive disconnection; Laser beams; Measurement by laser beam; Thickness measurement; X-ray lasers;
Conference_Titel :
High-Power Particle Beams (BEAMS 2004), 2004 International Conference on
Conference_Location :
St. Petersburg
Print_ISBN :
978-5-87911-088-3
