Radiation source

Details Radiation source Radiation source

1979-02-05

1981-02-24

Cangialosi, S. A.

176 5, G21B 100

Patent

active

042526078

ABSTRACT:
A device and method for relativistic electron beam heating of a high-density plasma in a small localized region. A relativistic electron beam generator or accelerator produces a high-voltage electron beam which propagates along a vacuum drift tube and is modulated to initiate electron bunching within the beam. The beam is then directed through a low-density gas chamber which provides isolation between the vacuum modulator and the relativistic electron beam target. The relativistic beam is then applied to a high-density target plasma which typically comprises DT, DD, or similar thermonuclear gas at a density of 10.sup.17 to 10.sup.20 electrons per cubic centimeter. The target gas is ionized prior to application of the relativistic electron beam by means of a laser or other preionization source to form a plasma. Utilizing a relativistic electron beam with an individual particle energy exceeding 3 MeV, classical scattering by relativistic electrons passing through isolation foils is negligible. As a result, relativistic streaming instabilities are initiated within the high-density target plasma causing the relativistic electron beam to efficiently deposit its energy into a small localized region of the high-density plasma target.

REFERENCES:
Phys. of Fluids, vol. 19, No. 6, (6/76), pp. 831-848, Thode, Plasma Heating by Relativistic Electron Beams.
Nuclear Fusion Suppl., (1977), vol. 2, p. 543, Thode II.
J. Appl. Phys., vol. 44, No. 11, (11/73), pp. 4913-4919, Mather et al.
Sov. Tech. Phys. Lett., vol. 2, No. 1, (1/76), pp. 20-22, Kiselev et al.
Physics of Fluids, vol. 20, No. 12, (12/77), pp. 2121-2127, Thode III.

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