Theory and simulation of emittance, space charge and electron pressure effects on focusing of neutralized ion beams
We investigate the final focus mode characterized by warm comoving electrons and vacuum propagation. In particular, we extend a previous envelope equation analysis of ion focusing in this mode to include the effects of ion emittance as well as ion space charge and initial electron temperature. Our major result is a simple equation relating initial R/sub o/ and final R/sub f/ beam radii to ion emittance epsilon and perveance K and electron Debye length lambda/sub D/ which is supported by one dimensional, electrostatic, particle-in-cell simulations of radial ion focusing. Finally, we use this equation to find the allowed temperature of neutralizing electrons for typical Heavy Ion Fusion reactor and High Temperature Experiment scenarios.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5607893
- Report Number(s):
- LA-UR-86-1825; CONF-860510-3; ON: DE86011239
- Resource Relation:
- Conference: Symposium on heavy ion inertial fusion, Washington, DC, USA, 27 May 1986
- Country of Publication:
- United States
- Language:
- English
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