A rotating target wheel with thin targets for heavy ion beams of high current densities

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Abstract

A target wheel rotating synchronously with the pulsed heavy ion beam of the GSI UNILAC is described. Isotopically enriched Pb targets of 4.5 × 1.5 cm2 and of thicknesses of 0.5 to 1.2 mg/cm2, covered with thin C layers on both sides, were mounted on the wheel and irradiated by up to 2 × 1012 s−1 Ar ions of 5 MeV/u on a beam spot of 0.25 cm2 without being destroyed. The total particle dose on the targets was 4 × 1016 ions.

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2. Physikalisches Institut, Universität Gießen, Fed. Rep. Germany.

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