Injection, trapping, and acceleration of an electron beam in a stellatron accelerator

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.866775· OSTI ID:5362538

Mandelbaum, B; Ishizuka, H; Fisher, A; Rostoker, N

The UCI modified betatron (Phys. Rev. Lett. 53, 266 (1984)) was converted into a stellatron accelerator by the addition of helical quadrupole coils to the betatron configuration. An experimental study of the injection, trapping, acceleration, and disruption of a beam in this apparatus has been conducted. The stellarator field applied was of up to 10 kG and with a rotational transform of iota-horizontal-slashapprox. =0.1-- 0.15. Electrons were injected from a thermionic emitter typically operated by applying 20 kV, 2-- 4 ..mu..sec pulses to the hot cathode, which emitted approx.3 A. A beam of approx.200 A was trapped in the torus and accelerated by the betatron field applied immediately after the injection. The beam life was extended by increasing the toroidal field. The beam current suffered a partial disruption after it reached its peak value. After that the beam lost electrons gradually, accompanied by generation of x rays, until the entire beam was lost close to the peak of the accelerating betatron field. Electron energies of up to approx.4 MeV were reached. The dependence of the beam current and its lifetime, upon the applied fields and injection conditions, was explored.

• Research Organization: Department of Physics, University of California, Irvine, California 92717
• OSTI ID: 5362538
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 31:4; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATION
ACCELERATORS
BEAM INJECTION
BEAMS
BETATRONS
CATHODES
CLOSED PLASMA DEVICES
CONFIGURATION
CONVERSION
CYCLIC ACCELERATORS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTRODES
ELECTRON BEAM INJECTION
ELECTRON BEAMS
EMISSION
ENERGY RANGE
EQUIPMENT
HELICAL CONFIGURATION
LEPTON BEAMS
MAGNET COILS
MEV RANGE
MEV RANGE 01-10
MULTIPOLES
PARTICLE BEAMS
PLASMA DISRUPTION
POWER
PULSES
QUADRUPOLES
STELLARATORS
THERMIONIC EMISSION
THERMONUCLEAR DEVICES
TRAPPING