Title :
Collective ion accelerator based on a temporary and spatially modulated intense REB
Author :
Onishchenko, Ivan N. ; Balakirev, Vladimir A. ; Chupikov, Petr T. ; Faehl, Rickey J. ; Medvedev, Dmitrij V. ; Markov, Peter I. ; Onishchenko, Nikolay I. ; Panasenko, Boris D. ; Prokopenko, Yurij V. ; Pushkarev, Stanislav S. ; Sotnikov, Gennadij V. ; Yegor
Author_Institution :
NSC "Kharkov Inst. of Phys. & Technol.", Kharkov, Ukraine
Abstract :
The concept of ion accelerator, based on space charge slow wave excitation in overlimiting high current relativistic electron beam (REB) subjected to temporal and spatial modulation has been theoretically and experimentally investigated. Analytical theoretical model and 2.5-D electromagnetic code has been elaborated and applied for study of physical phenomena of low frequency modulation of REB current due to repetitive relaxation of virtual cathode (VC) at plasma injection, ions acceleration in VC potential well, spatial modulation of REB in a periodic magnetic field, electric field topography of excited space charge slow wave, ions acceleration by this wave, and radial instability of ion beam in potential well of modulated REB. All of these problems have been explored experimentally at pulsed electron accelerator "Agat" producing tubular electron beam of parameters: energy up to 300 keV, current 5.4 kA, pulse duration 0.8 μs, mean dial11eter 32 mm. Two-staged ion accelerator gives C+ ion beam of energy 1.5 MeV and current 1 A.
Keywords :
frequency modulation; ion accelerators; ion beams; particle beam dynamics; particle beam injection; plasma accelerators; relativistic electron beams; REB current; REB spatial modulation; VC potential well; beam pulse duration; collective ion accelerator; electric field topography; electromagnetic code; electron accelerator; excited space charge slow wave; high current relativistic electron beam; ion beam current; ion beam energy; low frequency modulation; mean beam diameter; periodic magnetic field; physical phenomena; plasma injection; radial ion beam instability; repetitive relaxation; space charge; spatially modulated intense REB; temporal modulation; tubular electron beam; two-staged ion accelerator; virtual cathode; Anodes; Magnetic fields;
Conference_Titel :
High-Power Particle Beams (BEAMS 2004), 2004 International Conference on
Conference_Location :
St. Petersburg
Print_ISBN :
978-5-87911-088-3
