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Fusion Science and Technology
Latest News
Strontium: Supply-and-demand success for the DOE’s Isotope Program
The Department of Energy’s Isotope Program (DOE IP) announced last week that it would end its “active standby” capability for strontium-82 production about two decades after beginning production of the isotope for cardiac diagnostic imaging. The DOE IP is celebrating commercialization of the Sr-82 supply chain as “a success story for both industry and the DOE IP.” Now that the Sr-82 market is commercially viable, the DOE IP and its National Isotope Development Center can “reassign those dedicated radioisotope production capacities to other mission needs”—including Sr-89.
R.P. Keatch, B. Lawrenson, L.M. Huang, A. Meramveliotaki
Fusion Science and Technology | Volume 38 | Number 1 | July 2000 | Pages 119-122
Technical Paper | Thirteenth Target Fabrication Specialists’ Meeting | doi.org/10.13182/FST00-A36127
Articles are hosted by Taylor and Francis Online.
The techniques of photolithography and vacuum coating have been investigated, primarily as a means of producing three-dimensional structures. Using ultra-smooth glass capillary tubes as a substrate, and a rotational drive system, multiple free-standing cylinders can be fabricated on the surface. These are produced by a combination of metallisation and photolithography to accurately define the desired structure with precise edge definition. Owing to the rotary motion of the photolithography technique, it was found that by changing the physical shape of the mask directly varied the exposure time at different points, forming structures with definable surface topographies (e.g. cylinders with blazed or stepped cross-sections along their length). The advantages and limitations of these techniques are presented, highlighting the fabrication processes currently being developed to realise novel structures.