Evaluation of the RADCHEM Diagnostic as an Assessment of Fuel-Ablator Mix and Fuel Rho R

Shaughnessy, D A ; Cerjan, C ; Moody, K J ; Bernstein, L ; Hoffman, R ; Stoyer, M A ; Fortner, R ; Schneider, D

Lawrence Livermore National Laboratory

关键词: Fuels;    Nuclear Decay;    Charged Particles;    Capsules;    Neutrons;   

DOI  :  10.2172/1021543
RP-ID  :  LLNL-TR-472595
RP-ID  :  W-7405-ENG-48
RP-ID  :  1021543

美国|英语

来源: UNT Digital Library

【 摘 要 】

The RADCHEM diagnostic consists of the collection of both gaseous and solid debris samples following a NIF shot. Small amounts of detector elements are doped into the inner-most layer of the ablator shell, which then undergo nuclear activations with neutrons and/or charged particles that are produced during the fusion process. Reaction products are collected and their radioactive decays are counted in order to determine the number and type of activations that occurred. Simulations have shown that these data can then be correlated to several capsule parameters, including fuel rhoR ({rho}R), implosion asymmetry, and fuel-ablator mix. In this document we present a brief summary of the simulations that have been performed, and evalute the ability of RADCHEM to assess capsule performance. A longer, follow-on document, which will include more details on the specific simulations and experimental techniques that have been considered for RADCHEM, is currently being written.