Generator for generating high energy electrons in a gas

Details Generator for generating high energy electrons in a gas Generator for generating high energy electrons in a gas

1988-11-10

1990-04-10

Wieder, Kenneth

Electric lamp and discharge devices

Involving particular degree of vacuum

313632, 313633, 313354, 313575, 313336, 313351, 378136, H01J 114, H01J 116, H01J 1706, H01J 3506

Patent

active

049163558

ABSTRACT:
An X-ray generator comprises an anode (4) and a cathode (10) disposed in an enclosure (2) under low helium pressure and powered by an electric pulse generator (20) providing sufficient voltage in order to generate runaway electrons. The emission face of the cathode is a section of an emission plate (10) constituted by a carbon felt whose fibers have a privileged orientation perpendicular to said face in order to encourage the emission of electrons from said face. The invention is particularly applicable to pre-ionizing the discharge chamber of a gas laser.

REFERENCES:
patent: 3883760 (1975-05-01), Cunningham, Jr.
Review of Scientific Instruments, vol. 53, No. 7, Jul. 1982, pp. 1092-1093, American Institute of Physics, NY, USA: R. Prohaska et al., "Field emission cathodes using commercial carbon fibers".
Review of Scientific Instruments, vol. 54, No. 5, May 1983, pp. 586-590, American Institute of Physics, NY, USA, G. F. Erickson et al., "Use of carbon felt as a cold cathode for a pulsed line x-ray source operated at high repetition rates".
Soviet Technical Physics Letters, vol. 11, No. 9, Sep. 1985, pp. 458-560, American Institute of Physics, NY, USA, G. V. Kolbychev et al., "Discharge regimes in an intermediate-pressure gas with runaway electrons".

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