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A concept for converters of ion beam energy into thermal X-rays, of relevance to inertial confinement fusion (ICF), is studied by means of 2-D radiation hydrodynamics simulations. Cylinders made of low density, high atomic number materials, irradiated by an ion beam parallel to their axis, are considered. A solution is proposed that ensures complete stopping of the beam without degradation of energy conversion. A parametric analysis shows that high conversion efficiency requires specific deposition powers of the order of 1.0 x E16 W/g, in agreement with previous 1-D results. An analytic expression for the conversion efficiency as a function of the converter and beam parameters (and taking 2-D effects into account) is derived, which agrees with the simulations, and is suitable for application to ICF target design.

Additional information

Authors: ATZENI S, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: RT/NUCL/90/43 EN (1990) 10 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199210165 / Last updated on: 1994-12-02
Original language: en
Available languages: en