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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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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.
C. A. Frederick, R. R. Paguio, A. Nikroo, J. H. Hund, O. Acennas, M. Thi
Fusion Science and Technology | Volume 49 | Number 4 | May 2006 | Pages 657-662
Technical Paper | Target Fabrication | doi.org/10.13182/FST06-A1182
Articles are hosted by Taylor and Francis Online.
Resorcinol Formaldehyde (R/F) foam has been used in the fabrication of direct drive shell targets for Inertial Fusion Confinement (ICF) experiments at the University of Rochester's Laboratory for Laser Energetics (LLE). Recent cryogenic experiments at LLE using R/F shells have shown the necessity of larger pore foam compared to the standard R/F formulation. In this paper, we report controlling the pore size of R/F foam with concomitant control of the gelation time, which is crucial for successful shell fabrication. The "standard" formulation, with pores of <100 nm, was modified by decreasing the base catalyst to resorcinol concentration ratio creating a large pore R/F foam (~ >0.5 m) through reaction limited aggregation. However, this formulation decreased the gelation time, which decreased the yield of shells with proper wall uniformity (~ 30%) to an unacceptable level of <1%. We developed a technique to achieve control over the gelation time, while keeping the large pore characteristics of R/F to improve shell non-uniformity and increasing the yield to an acceptable level. We also developed a new technique for large pore formation involving changes to the acid catalyst concentration. The effects of this new formulation on the wall uniformity of shells are discussed. The pore distributions obtained using these new R/F foams were characterized using a variety of techniques, including electron microscopy, nitrogen gas adsorption, visible spectroscopy, and small angle x-ray scattering and compared to the standard small pore formulation.