High Power Hydrogen Injector with Beam Focusing for Plasma Heating

Journal Article · Sat Jan 15 00:00:00 EST 2005 · Fusion Science and Technology

OSTI ID:20849797

Deichuli, P P; Ivanov, A A; Korepanov, S A; Mishagin, V V; Sorokin, A V; Stupishin, N V

High power neutral beam injector has been developed with the atom energy of 25 keV, a current of 60 A, and several milliseconds pulse duration. Six of these injectors will be used for upgrade of the atomic injection system at central cell of a Gas Dynamic Trap (GDT) device and 2 injectors are planned for SHIP experiment.The injector ion source is based on an arc discharge plasma box. The plasma emitter is produced by a 1 kA arc discharge in hydrogen. A multipole magnetic field produced with permanent magnets at the periphery of the plasma box is used to increase its efficiency and improve homogeneity of the plasma emitter. The ion beam is extracted by a 4-electrodes ion optical system (IOS). Initial beam diameter is 200 mm. The grids of the IOS have a spherical curvature for geometrical focusing of the beam. The optimal IOS geometry and grid potentials were found with the numerical simulation to provide precise beam formation. The measured angular divergence of the beam is 0.02 rad, which corresponds to the 2.5 cm Gaussian radius of the beam profile measured at focal point.

• OSTI ID: 20849797
• Journal Information: Fusion Science and Technology, Vol. 47, Issue 1T; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); ISSN 1536-1055
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM PROFILES
COMPUTERIZED SIMULATION
EFFICIENCY
HYDROGEN
ION BEAMS
ION SOURCES
IONS
KEV RANGE
MAGNETIC FIELDS
OPTICAL SYSTEMS
PERMANENT MAGNETS
PLASMA
PLASMA HEATING
PLASMA POTENTIAL
PLASMA SIMULATION
PULSES
SPHERICAL CONFIGURATION
THERMONUCLEAR DEVICES
TRAPS