Overview of the gamma reaction history diagnostic for the National Ignition Facility (NIF)

Robert M. Malone; Zaheer A. Ali; Brian C. Cox; Scott C. Evans; Brent C. Frogget; Hans W. Herrmann; Morris I. Kaufman; Yong H. Kim; Kevin D. McGillivray; Joseph M. Mack; E. Kirk Miller; Martin J. Palagi; Wolfgang Stoeffl; Aric Tibbitts; Thomas W. Tunnell; Carl S. Young

doi:10.1117/12.869102

8 September 2010 Overview of the gamma reaction history diagnostic for the National Ignition Facility (NIF)

Robert M. Malone, Zaheer A. Ali, Brian C. Cox, Scott C. Evans, Brent C. Frogget, Hans W. Herrmann, Morris I. Kaufman, Yong H. Kim, Kevin D. McGillivray, Joseph M. Mack, E. Kirk Miller, Martin J. Palagi, Wolfgang Stoeffl, Aric Tibbitts, Thomas W. Tunnell, Carl S. Young

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Proceedings Volume 7652, International Optical Design Conference 2010; 76520Z (2010) https://doi.org/10.1117/12.869102
Event: International Optical Design Conference 2010, 2010, Jackson Hole, WY, United States

Abstract

The National Ignition Facility (NIF) has a need for measuring gamma radiation as part of a nuclear diagnostic program. A new gamma-detection diagnostic uses 90° off-axis parabolic mirrors to relay Cherenkov light from a volume of pressurized gas. This nonimaging optical system has the high-speed detector placed at a stop position with the Cherenkov light delayed until after the prompt gammas have passed through the detector. Because of the wavelength range (250 to 700 nm), the optical element surface finish was a key design constraint. A cluster of four channels (each set to a different gas pressure) will collect the time histories for different energy ranges of gammas.

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Robert M. Malone, Zaheer A. Ali, Brian C. Cox, Scott C. Evans, Brent C. Frogget, Hans W. Herrmann, Morris I. Kaufman, Yong H. Kim, Kevin D. McGillivray, Joseph M. Mack, E. Kirk Miller, Martin J. Palagi, Wolfgang Stoeffl, Aric Tibbitts, Thomas W. Tunnell, and Carl S. Young "Overview of the gamma reaction history diagnostic for the National Ignition Facility (NIF)", Proc. SPIE 7652, International Optical Design Conference 2010, 76520Z (8 September 2010); https://doi.org/10.1117/12.869102

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