First hohlraum drive studies on the National Ignition Facilitya)
First hohlraum drive studies on the National Ignition Facilitya)
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DOI：
10.1063/1.2178783
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发表时间：
2006-05
影响因子：
2.2
通讯作者：
E. Dewald;O. Landen;L. Suter;J. Schein;J. Holder;K. Campbell;S. Glenzer;J. Mcdonald;C. Niemann;A. Mackinnon;M. Schneider;C. Haynam;D. Hinkel;B. Hammel
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文献类型：
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作者：
E. Dewald;O. Landen;L. Suter;J. Schein;J. Holder;K. Campbell;S. Glenzer;J. Mcdonald;C. Niemann;A. Mackinnon;M. Schneider;C. Haynam;D. Hinkel;B. Hammel
在国家点火装置上进行了首次黑腔实验[G. H.米勒，E. I. Moses和C. R. Wuest，Nucl. Fusion 44，228（2004）]已经激活了间接驱动实验能力，并测试了黑腔等离子体填充所施加的辐射温度极限。用功率为9 TW、脉冲宽度为1 ~ 9 ns、能量为17 kJ的激光辐照真空黑腔，研究了黑腔辐射温度随激光功率和黑腔尺寸的变化规律，并与以前在其他激光装置上进行的黑腔实验进行了比较。此外，对于各种黑腔尺寸和脉冲长度，测量的X射线通量显示等离子体填充的签名，与从黑腔流出的等离子体的硬X射线发射相一致。这些观测结果与流体动力学模拟和包括流体动力学和日冕辐射损失的分析模型一致。模型预测了辐射温度极限...
The first hohlraum experiments on the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Nucl. Fusion 44, 228 (2004)] using the first four laser beams have activated the indirect-drive experimental capabilities and tested radiation temperature limits imposed by hohlraum plasma filling. Vacuum hohlraums have been irradiated with laser powers up to 9 TW, 1 to 9ns long square pulses and energies of up to 17kJ to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed previously at other laser facilities. Furthermore, for a variety of hohlraum sizes and pulse lengths, the measured x-ray flux shows signatures of plasma filling that coincide with hard x-ray emission from plasma streaming out of the hohlraum. These observations agree with hydrodynamic simulations and with analytical modeling that includes hydrodynamic and coronal radiative losses. The modeling predicts radiation temperature limits ...