We present for the first time characterization of the time-dependent radiation drive on the capsule by measuring the localized re-emitted flux at Shenguang-III prototype laser facility. The drive flux was obtained with measured re-emitted flux from the capsule and radiation fluxes from the hohlraum wall, in combination with radiation hydrodynamic simulations. It revealed that the temporal behavior of the drive flux was quite distinguished from the radiation flux from the hohlraum wall, and the drive flux was approximately 6 eV (12 eV) lower than the measured flux at up 55° (up 30°). This technique presents a novel way for the assessment of the drive flux, both in cylindrical hohlraums and novel hohlraums with more than two laser entrance holes. Pre-processed radiation hydrodynamic simulations indicate that this technique can also be applied in integrated implosion experiments utilizing standard fusion capsule with carbon-hydrogen ablators.
我们首次通过测量神光-III原型激光装置上靶丸的局部再发射通量，表征了靶丸上的时间相关辐射驱动。该驱动通量是通过结合靶丸再发射通量的测量结果与黑腔壁辐射通量，并借助辐射流体力学模拟获得的。结果表明，驱动通量的时间行为与黑腔壁辐射通量存在显著差异，且驱动通量在55°（30°）测量角度下比辐射通量低约6 eV（12 eV）。该技术为评估驱动通量提供了一种新方法，既适用于柱形黑腔，也适用于具有多个激光入口孔的新型黑腔。预处理辐射流体力学模拟表明，该技术还可应用于采用标准碳氢烧蚀层的集成内爆实验中。