A high-current density contact ionization source for heavy-ion fusion

A high-current density contact ionization source for heavy-ion fusion

Heavy ion fusion (HIF) sources will be low-emittance, high current (0.5-1 A), and suitable for injection into a multiple beam induction linac, where the diameter of each beam aperture at the beginning of the accelerator is 3-6 cm. Practical transport limits involved in matching the beam to the accel...

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Bibliographische Detailangaben
Hauptverfasser: MacLaren, S., Beck, D., Faltens, A., Ghiorso, W., Henestroza, E., Seidl, P.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Apertures
Current density
Indium
Ion accelerators
Ion sources
Ionization
Laboratories
Linear particle accelerator
Optical refraction
Particle beams
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Zusammenfassung:Heavy ion fusion (HIF) sources will be low-emittance, high current (0.5-1 A), and suitable for injection into a multiple beam induction linac, where the diameter of each beam aperture at the beginning of the accelerator is 3-6 cm. Practical transport limits involved in matching the beam to the accelerator aperture in a reasonably-sized structure correspond to several mA/cm/sup 2/ of space charge limited flow with an injector extraction voltage of 1-2.5 MV. We have built a J/spl ap/8 mA/cm/sup 2/ Cs/sup +/ contact ionization source for a 160 kV diode; this represents a factor of four increase in the Cs/sup +/ current density over previous sources for HIF. The emitter is sintered iridium, operating at 950
DOI:10.1109/PAC.1999.792959