Production of intense ion beams in a reflex triode with an external plasma source at the anode

Journal Article · Mon Sep 01 00:00:00 EDT 1986 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:6751861

Bystritskii, V M; Verigin, A A; Volkov, S N; Krasik, Y E; Podkatov, V I

An experimental study of the production of intense ion beams in a reflex triode with an external plasma source at the anode is reported. The ions had various ratios Z/M. When the anode plasma is produced in a preliminary charging pulse of the accelerator, the plasma density is too low for operation under charge-limited emission conditions. In this case, an ion beam is observed to be produced from the plasma formed by the direct heating of the anode material by oscillating electrons. When an anode plasma resulting from the breakdown of a dielectric insert or of the vacuum gap of a composite andode by an external voltage source is used to produce an ion beam, the reflex triode operating conditions depend on delaying the operation of the accelerator with respect to the external source. The highest efficiency (approx. =20%) in the production of an ion beam is observed at t/sub d/ = 3--6 ..mu..s. In this case, the reflex triode operates under increasing or constant impedance conditions. It was shown in the course of the experiments that the ion beam which is produced is nonuniform. There are three groups of ions: H/sup +/, C/sup n//sup +/, and Cu/sup n//sup +/. The energy of the heavy ions depends on the applied anode potential. The different mass components of the ion beam do not appear at the same time. The macroscopic divergence of the beam is 4--6/sup 0/ at the periphery and drops off to approx. <1/sup 0/ at the center. The microscopic divergence of the beam is 3/sup 0/. The total energy of the ion beam which is produced is less than 120 J at an average current approx. =2.8 kA.

• Research Organization: Scientific-Research Institute of Nuclear Physics, S. M. Kirov Polytechnical Institute, Tomsk
• OSTI ID: 6751861
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Vol. 12:9
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON IONS
BEAM PRODUCTION
COPPER IONS
HYDROGEN IONS 1 PLUS
ACCELERATION
CATHODES
ION BEAMS
SPACE CHARGE
TRIODE TUBES
BEAMS
CATIONS
CHARGED PARTICLES
ELECTRODES
ELECTRON TUBES
HYDROGEN IONS
IONS
640301* - Atomic
Molecular &amp; Chemical Physics- Beams &amp; their Reactions