Dry Settling and Pressing at IUCF
A variety of pressed powder targets of 2-cm dia. have been produced using a compact, simple, and material-conservative technique. Although the attainable thicknesses are highly specific to the material and experiment, the basic method, and variations of it, have been useful in making very thin binder-supported targets, two to twenty-five mg/cm2 unsupported targets and very thick conventionally pressed targets. Rudiments of the method are: 1. two mechanical vibrators linked by a wire loop, 2. a narrow glass tube capped with an appropriately sized stainless steel screen, 3. vacuum evaporated carbon-coated glass slide pieces as the substrate for the settling and pressing operations, and 4. counter rotation of the substrate and sifting tube during settling.
KeywordsWire Loop Carbon Foil Stainless Steel Screen Mechanical Vibrator Counter Rotation
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- (1).Obtained from the Arizona Carbon Foil Co., 2239 East Kleindale Road, Tucson, AZ 85719, (602) 884–3495.Google Scholar
- (2).12C and 13C obtained from ProChem, 19 Ox Bow Ln., Summit, NJ 07901, (201) 273–0440. All other isotopes obtained from ORNL.Google Scholar
- (3).This technique has also been used to prepare targets from environmental samples for elemental analysis.Google Scholar
- (4).W. R. Lozowski, A Dry Powder Technique for the Preparation of Carbon Foils, Proceedings of the 6th Annual Conf. of the I. N. T. D. S., p. 115–119, Oct. 1977.Google Scholar