| |
 |
|
| |
Ion Trajectories and Focusing in Spherical Inertial Electromagnetic Confinement
| Author: | Budaev V.P. |
| Coauthor: | |
| Institution : | Institute for Nuclear Fusion, RRC “Kurchatov Institute” |
| Abstract text: | Performance of spherical magnetic electrostatic confinement fusion is analysed. The main idea is to transform a linear arrangement of the ring cusps to a spherical one [1]. Magnetic field lines in spherical cusps provide a chaotic scattering system that improves the ion focusing due to synergetic effect of intermittent ion trajectories. Confined ions are bounced within electrostatic well reflecting from magnetic barriers shaped by convex field lines. The concept offers a means of enhancing ion reactivity provided by caustic formation that are resulted from an intersection of ion orbits within confinement volume. Single ion 3D trajectory tested numerically in idealised version of problem, indicates the formation of dense region referred as caustic. Parameters of the experimental device are estimated:
Cusp anode radius, 0.3 m
Plasma radius R, 0.25 m
Cusp magnetic induction, 1 T
Volume magnetic induction, 0.2 T
Cusp anode gap width, 0.3 cm
Cusp plugging anode voltage, 25 kV
Electron injection energy, 20 keV
Electron injection current, 0.2 A
Pulse duration, ~30 msec
Volume plasma density , 10 ^18 m^-3
Central plasma density, 10 ^19 m ^-3
Ti, e, 1 keV
Energy confinement time, ~6 msec
Potential advantages of proposed concept similar to well known magnetic electrostatic plasma confinement: many different fusion reactions (i.e., D-D, D-T, D-3He, p-11B, and p-7Li) may occur from high-energy collisions between the counter-streaming ions oscillating in the electrostatic well formed by electrons. This device can produce high-energy neutrons, protons, alphas, etc. It may be attractive source (10 6 –10 12 particles/s) suitable for scattering analysis, neutron activation, isotope production, medical therapy.
[1] V. Budaev. J. Plasma Fusion Res. SERIES, Vol. 5 (2002) 346
|
|
|