학술논문
High-yield magnetic recoil neutron spectrometer on the National Ignition Facility for operation up to 60 MJ.
Document Type
Article
Author
Source
Subject
*NEUTRON spectrometers
*ION temperature
*ELECTRONIC data processing
*SPECTROMETERS
*FACILITIES
*NEUTRON counters
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*
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Language
ISSN
0034-6748
Abstract
Recent progress at the National Ignition Facility (NIF), with neutron yields of order 1 × 1017, places new constraints on diagnostics used to characterize implosion performance. The Magnetic Recoil neutron Spectrometer (MRS), which is routinely used to measure yield, ion temperature (Tion), and down-scatter ratio (dsr), has been adapted to allow measurements of dsr up to 5 × 1017, and yield and Tion up to 2 × 1018 in the near term with new data processing techniques and conversion foil solutions. This paper presents a solution for extending MRS operation up to a yield of 2 × 1019 (60 MJ) by moving the spectrometer outside of the NIF shield wall. This will not only enhance the upper yield limit by 10× but also improve signal-to-background by 5×. [ABSTRACT FROM AUTHOR]