Neutral particle beam intensity controller
A method is proposed in which an amplitude-modulated, rotating magnetic field is applied to an accelerated ion beam in a gas neutralizer to defocus the resultant neutral and ion beam in a controlled manner to control the intensity of the neutral beam along the beam axis at constant beam energy. Adjustments in the gas pressure determine the fraction of ions that is neutralized. The rotating magnetic field alters the orbits of the ions in the gas neutralizer before they are neutralized. By adjusting the gas pressure and the amplitude of the rotating magnetic field, one can control the fraction of neutral and ion particles transmitted out of the neutralizer along the central beam axis to a fusion device or other application. This method can also be used for applications where no neutralization gas is used and thus most of the beam remains in the ion state. The defocused neutral or ion particles are sprayed onto an actively cooled beam dump, which intercepts the deflected particles. The beam dump has a central opening for passage of the remaining beam along the central axis of the beam line. 4 refs., 4 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6729868
- Report Number(s):
- CONF-881151-15; ON: DE89001353; TRN: 88-035914
- Resource Relation:
- Conference: International conference on the application of accelerators in research and industry, Denton, TX, USA, 7 Nov 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Neutral particle beam intensity controller
Neutral particle beam intensity controller