Preparation of self-supporting carbon thin films

摘要

For heavy-ion beam experiments, self-supporting carbon thin films are needed as targets, stripper foils and as backings (Nucl. Instr. and Meth. A 334 (1993) 69) for materials which cannot be produced self-supporting. Using resistance evaporation under high vacuum, self-supporting carbon foils with a thickness of 5 mug/cm(2) and a diameter of 10 mm, a thickness of 10 mug/cm(2) and a diameter of 50 mm. up to a thickness of 50 mug/cm(2) and a diameter of 300 mm can be obtained. Due to the energy impact of the heavy-ion beam, the amorphous carbon is restructured into textured graphite, as was found already by Dollinger et al. (Nucl. Instr. and Meth. A 303 (1991) 79). The authors discuss the production process as well as the change of the layer structure caused by the energy deposit. (C) 2001 Elsevier Science B.V. All rights reserved. References: 11