Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Science. 2010 Mar 5;327(5970):1231-5. doi: 10.1126/science.1185747. Epub 2010 Jan 28.
Measurements of x-ray-driven implosions with charged particles have resulted in the quantitative characterization of critical aspects of indirect-drive inertial fusion. Three types of spontaneous electric fields differing in strength by two orders of magnitude, the largest being nearly one-tenth of the Bohr field, were discovered with time-gated proton radiographic imaging and spectrally resolved proton self-emission. The views of the spatial structure and temporal evolution of both the laser drive in a hohlraum and implosion properties provide essential insight into, and modeling validation of, x-ray-driven implosions.
带电粒子测量 X 射线驱动内爆，实现了间接驱动惯性聚变关键方面的定量表征。利用时间门控质子射线照相成像和光谱分辨质子自发射，发现了强度相差两个数量级的三种类型的自发电场，最大的电场接近玻尔场的十分之一。这些对腔内激光驱动以及内爆特性的空间结构和时间演化的观察，为 X 射线驱动内爆提供了重要的见解和模型验证。
