Title :
The X-ray emission from vacuum discharge micro fragments at comparatively low applied voltages
Author :
Vogel, Nadja ; Skvortsov, Vladimir
Author_Institution :
Dept. of Phys., Univ. of Technol., Chemnitz, Germany
fDate :
2/1/1999 12:00:00 AM
Abstract :
The temporal evolution of X-ray emission of laser-induced discharges was investigated by means of a picosecond X-ray streak camera. Point-like structures with a divergence of order 10-7 and thin hot layers of intense X-ray radiation with life time from 30 ps to 1.5 ns in spectral range 100 eV-10 keV have been found in a comparatively low voltage vacuum discharge (U=150 V-2.7 kV) initiated by picosecond laser beam. Computer simulation shows that such X-ray generation is connected with a matter transition into extreme states when in local microvolumes of dense current carrying plasma the pressures can exceed values of 5 Mbar and the specific internal energies ε⩾1 MJ/g
Keywords :
X-ray optics; X-ray production; discharges (electric); plasma density; plasma pressure; plasma simulation; X-ray emission; X-ray generation; computer simulation; dense current carrying plasma; extreme states; intense X-ray radiation; laser-induced discharges; lifetime; local microvolumes; low applied voltages; low voltage vacuum discharge; matter transition; picosecond X-ray streak camera; picosecond laser beam; plasma pressures; plasma simulation; point-like structures; specific internal energies; spectral range; temporal evolution; thin hot layers; time evolution; vacuum discharge micro fragments; Cameras; Cathodes; Current density; Laser beams; Low voltage; Optical pulses; Plasma density; Plasma temperature; Plasma x-ray sources; X-ray lasers;
Journal_Title :
Plasma Science, IEEE Transactions on
