Ion source design for industrial applications

Abstract

The design of broad-beam industrial ion sources is described. The approach used emphasizes refractory metal cathodes and permanent-magnet multipole discharge chambers. Desi~n procedures and sample calculations are given for the discharge chamber, ion optics, cathodes, and magnetic circuit. Hardware designs are included for the isolator, cathode supports, anode supports, pole-piece assembly, and ion-optics supports. There are other ways of designing most ion source components, but the designs presented are representative of current technology and adaptable to a wide ran~e of configurations.

Technology of closed-drift thrusters

“…But experience indicates that the discharge loss variation is considerably less than linear with ionization potential. 59 The other major loss that should be considered is the escape of neutral, or nonionized, propellant. The operation of a lowpressure discharge to generate ions has been found to depend on the maintenance of a minimum neutral density, with the exact value of neutral density dependent on the geometry of the ion production region.…”

“…The operation of a lowpressure discharge to generate ions has been found to depend on the maintenance of a minimum neutral density, with the exact value of neutral density dependent on the geometry of the ion production region. 59 For an anode-layer thruster, the pertinent geometry parameter is the depth of the ion production region. This depth, as mentioned earlier, is of the order of an electron-cyclotron orbit.…”

Fusion and Space

“…Ионный двигатель. В ионных двигателях [4][5][6]12] происходит ускорение ионных пучков в электрическом поле, организованном с помощью электродов. Объёмный заряд не компенсирован, что служит одним из ограничений на плотность тока в таком пучке.…”

Development of the linear gridless ion thruster

“…Equation 5 gives an estimate of xenon number density in m" 3 based on geometric parameters such as the primary electron area (A p ) and the primary electron volume (Qp). 11 The final term involving the mass and cross sections of xenon and argon is a correction factor to account for the gas being used.…”