Honeycomb surface-plasma source of negative ions

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:6741808

Bel'chenko, Y I

A new honeycomb surface-plasma source of negative hydrogen ions is described. The cathode is a large array of cells with spherically concave surfaces. The negative ions ejected from the cathode by fast particles from a cesium--hydrogen discharge are accelerated in the potential-drop layer near the cathode and are focused geometrically into small emission apertures in the anode. The effect is to raise the gas and energy efficiencies of the source and to reduce the power density dissipated at the cathode. The yield of H/sup -/ ions is proportional to the number of cells. A pulsed beam of negative ions with a current up to 4 A has been produced and accelerated to 25 kV from a working cathode surface area of 10.6 cm/sup 2/ through emission windows with a total area of 0.5 cm/sup 2/. Honeycomb surface-plasma sources with more cells hold promise for producing beams of negative ions with a current of tens of amperes.

• Research Organization: Institute of Nuclear Physics, Siberian Branch, Academy of Sciences of the USSR
• OSTI ID: 6741808
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 9:6; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATORS
ANIONS
BEAMS
CATHODES
CHARGED PARTICLES
ELECTRODES
FLUID FLOW
FOCUSING
GAS FLOW
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION BEAMS
ION SOURCES
IONS