Fusion-neutron measurements for magnetized liner inertial fusion experiments on the Z accelerator
Fusion-neutron measurements for magnetized liner inertial fusion experiments on the Z accelerator
复制标题
Z 加速器上磁化线性惯性聚变实验的聚变中子测量
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
R. Vesey
中科院分区：
文献类型：
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作者：
K. Hahn;G. Chandler;C. Ruiz;G. Cooper;M. Gomez;S. Slutz;A. Sefkow;D. Sinars;S. Hansen;P. Knapp;P. Schmit;E. Harding;C. Jennings;T. Awe;M. Geissel;D. Rovang;J. Torres;J. Bur;M. Cuneo;V. Glebov;A. Harvey;M. Herrman;M. Hess;O. Johns;B. Jones;D. Lamppa;J. Lash;M. Martin;R. Mcbride;K. Peterson;J. Porter;J. Reneker;G. Robertson;G. Rochau;M. Savage;I. Smith;J. Styron;R. Vesey
自2013年底以来，在桑迪亚国家实验室的Z加速器上进行了几次磁化直线惯性聚变(MagLIF)实验。对这些实验的初级DD(2.45 MeV)中子的测量表明，中子产生是热核的。在离子温度∼为2-3keV的条件下，获得了高达3e12的初级DD产额。对次级DT(14 MeV)中子的测量表明，燃料被显著磁化。从铍衬里向下散射的中子的测量表明，ρ衬里∼为1g/cm~2。根据中子飞行时间(NTOF)测量估算的中子轰击时间与X射线峰值产生的时间一致。改进和扩展Z中子诊断套件的计划包括中子燃烧历史诊断、提高灵敏度和更高精度的nTOF探测器以及基于中子反冲的产额和光谱测量。
Several magnetized liner inertial fusion (MagLIF) experiments have been conducted on the Z accelerator at Sandia National Laboratories since late 2013. Measurements of the primary DD (2.45 MeV) neutrons for these experiments suggest that the neutron production is thermonuclear. Primary DD yields up to 3e12 with ion temperatures ∼2-3 keV have been achieved. Measurements of the secondary DT (14 MeV) neutrons indicate that the fuel is significantly magnetized. Measurements of down-scattered neutrons from the beryllium liner suggest ρRliner∼1g/cm2. Neutron bang times, estimated from neutron time-of-flight (nTOF) measurements, coincide with peak x-ray production. Plans to improve and expand the Z neutron diagnostic suite include neutron burn-history diagnostics, increased sensitivity and higher precision nTOF detectors, and neutron recoil-based yield and spectral measurements.