Title :
Formation of stable longpulse electron beams with the help of explosive emission cathodes
Author_Institution :
Efremov Inst. of Electrophys. Apparatus, St. Petersburg, Russia
Abstract :
To obtain spatially and temporally stable electron beams with the help of explosive emission cathodes the following measures are recommended: the cathode is made as a multi-point structure; points are made from bunches of carbon fibers; in a circuit of each point a resistor of certain value is inserted; all auxiliaries cathode elements are maintained under cathode plasma floating potential; speed of voltage increase at the pulse front must be higher than 108 V/s. On the base of this technology the cathodes of different geometry and size for production of flat, cylindrical, tubular, radial converting electron beams can be created. Such electron beams are used for generation of microwave- and x-ray radiation, pumping gas lasers, modification of material properties, etc. Examples of facilities design and electron beam applications are presented.
Keywords :
carbon fibres; electron beams; explosions; plasma X-ray sources; plasma instability; plasma transport processes; carbon fiber bunches; cathode elements; cathode plasma floating potential;; circuit resistor; cylindrical electron beams; electron beam applications; electron beam geometry; electron beam size; explosive emission cathodes; flat electron beam production; gas laser pumping; microwaveradiation generation; multipoint cathode structure; pulse front; radial converting electron beams; spatially stable electron beams; stable longpulse electron beam formation; temporally stable electron beams; tubular electron beams; voltage increase; x-ray radiation generation; Anodes; Cathodes; Electron sources; Laser excitation;
Conference_Titel :
High-Power Particle Beams (BEAMS 2004), 2004 International Conference on
Conference_Location :
St. Petersburg
Print_ISBN :
978-5-87911-088-3
