Electrostatic Ion Confinement in a Magnetic Mirror Field

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The electrostatic ion stoppering in a magnetic mirror field is demonstrated experimentally in rather high plasma density (10¹⁰<n₀\lesssim10¹³cm⁻³). The ion loss from the mirror throat expressed by a loss factor δ, is reduced to about one quarter of the initial value. It is discussed as a confinement mechanism of ions that particles are reflected back adiabatically by the electrostatic field at the mirror throats of the magnetic field.