EXPERIMENTAL INVESTIGATION OF ION CYCLOTRON RESONANCE ACCELERATION IN A NONUNIFORM MAGNETIC FIELD

Ion acceleration of a plasma in a nonuniform magnetic field by an rf field is investigated. The ions are accelerated along the axis of the magnetic line due to the μ∇ ‖ B force, where μ is the magnetic moment of an ion of which energy is increased through cyclotron damping of electrostatic ion cyclotron wave and ∇ ‖ B is the magnetic field gradient along the axis. Ions are accelerated to about 200 eV at rf electric field of 60 V/cm. The computed results of the dispersion relation of the wave including cyclotron damping agree well with the experimental ones. © 1969, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.