Abstract

A rotating holder for low-melting-point targets has been constructed. It makes it possible to increase the maximum beam current by an order of magnitude without melting a target with low thermal conductivity such as selenium. This experimental result has been checked and rather well reproduced in theoretical heat-flow calculations. The calculations were also done for a good heat conductor (cadmium) and it was found that such a target requires a very high rotational frequency in order to be cooled by the rotation.

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