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Fusion Science and Technology
Latest News
College students help develop waste-measuring device at Hanford
A partnership between Washington River Protection Solutions (WRPS) and Washington State University has resulted in the development of a device to measure radioactive and chemical tank waste at the Hanford Site. WRPS is the contractor at Hanford for the Department of Energy’s Office of Environmental Management.
Jeffery F. Latkowski, Alison Kubota, Maria J. Caturla, Sham N. Dixit, Joel A. Speth, Stephen A. Payne
Fusion Science and Technology | Volume 43 | Number 4 | June 2003 | Pages 540-558
Technical Paper | doi.org/10.13182/FST43-540
Articles are hosted by Taylor and Francis Online.
The survivability of the final optic, which must sit in the line of sight of high-energy neutrons and gamma rays, is a key issue for any laser-driven inertial fusion energy (IFE) concept. Previous work has concentrated on the use of reflective optics. Here, we introduce and analyze the use of a transmissive final optic for the IFE application. Our experimental work has been conducted at a range of doses and dose rates, including those comparable to the conditions at the IFE final optic. The experimental work, in conjunction with detailed analysis, suggests that a thin, fused silica Fresnel lens may be an attractive option when used at a wavelength of 351 nm. Our measurements and molecular dynamics simulations provide convincing evidence that the radiation damage, which leads to optical absorption, not only saturates but that a "radiation annealing" effect is observed. A system-level description is provided, including Fresnel lens and phase plate designs.