Proton Radiography of Inertial Fusion Implosions
Proton Radiography of Inertial Fusion Implosions
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DOI：
10.1126/science.1152640
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发表时间：
2008-02
期刊：
影响因子：
56.9
通讯作者：
J. R. Rygg;F. Séguin;Chikang Li;J. Frenje;M. Manuel;R. Petrasso;R. Betti;J. Delettrez;O. Gotchev-O
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文献类型：
--
作者：
J. R. Rygg;F. Séguin;Chikang Li;J. Frenje;M. Manuel;R. Petrasso;R. Betti;J. Delettrez;O. Gotchev-O
一种独特的惯性聚变内爆定量成像方法导致了两种不同类型电磁构型的表征，并测量了胶囊尺寸和面密度的时间演变。使用脉冲、单能量、各向同性质子源的射线照相通过质子轨迹的偏转显示场结构，并通过质子在穿越等离子体时损失的能量来量化面密度。这两种场结构由(i)许多具有复杂条纹和分叉的径向细丝组成，它们贯穿整个视野，磁场强度为60特斯拉；（ii）一个相干的、中心定向的电场，每米109伏，在胶囊表面附近可见。虽然产生这些场的机制尚不清楚，但它们对内爆动力学的影响是潜在的。
A distinctive way of quantitatively imaging inertial fusion implosions has resulted in the characterization of two different types of electromagnetic configurations and in the measurement of the temporal evolution of capsule size and areal density. Radiography with a pulsed, monoenergetic, isotropic proton source reveals field structures through deflection of proton trajectories, and areal densities are quantified through the energy lost by protons while traversing the plasma. The two field structures consist of (i) many radial filaments with complex striations and bifurcations, permeating the entire field of view, of magnetic field magnitude 60 tesla and (ii) a coherent, centrally directed electric field of order 109 volts per meter, seen in proximity to the capsule surface. Although the mechanism for generating these fields is unclear, their effect on implosion dynamics is potentially consequential.