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Abstract:
A compact tape drive applicable in experiments with repetitively pulsed lasers is described. By exposing fresh material to the laser pulse at each shot, it is possible to obtain up to 104 shots in a single run. A particular tape can be used many times. The tape target provides stable output, is easy to adjust, and is low cost in operation. The possibility of illuminating samples with the rear-side emission is a further advantage for many applications. Experiments are described in which a copper tape, 10 m long, 12 mm wide, and 25 μm thick, is used to generate Cu K α radiation. Applying 2 TW titanium-sapphire laser pulses, yields 2.7x109 K α photons/Sr per shot. Bragg and powder spectra generated with this radiation are shown. (C) 2002 American Institute of Physics.
