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首页> 外文期刊>Physics of plasmas >Electron temperature measurements inside the ablating plasma of gas-filled hohlraums at the National Ignition Facility
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Electron temperature measurements inside the ablating plasma of gas-filled hohlraums at the National Ignition Facility

机译：国家点火设施的充气卧式烧蚀等离子体内的电子温度测量

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The first measurement of the electron temperature (T-e) inside a National Ignition Facility hohlraum is obtained using temporally resolved K-shell X-ray spectroscopy of a mid-Z tracer dot. Both isoelectronic- and interstage-line ratios are used to calculate the local T-e via the collisional-radiative atomic physics code SCRAM [Hansen et al., High Energy Density Phys 3, 109 (2007)]. The trajectory of the mid-Z dot as it is ablated from the capsule surface and moves toward the laser entrance hole (LEH) is measured using side-on x-ray imaging, characterizing the plasma flow of the ablating capsule. Data show that the measured dot location is farther away from the LEH in comparison to the radiation-hydrodynamics simulation prediction using HYDRA [Marinak et al., Phys. Plasmas 3, 2070 (1996)]. To account for this discrepancy, the predicted simulation T-e is evaluated at the measured dot trajectory. The peak T-e, measured to be 4.2 keV +/- 0.2 keV, is similar to 0.5 keV hotter than the simulation prediction. Published by AIP Publishing.
机译：使用中Z示踪点的时间分辨K壳X射线光谱学，可以对国家点火设施内的电子温度（T-e）进行首次测量。等电线比例和级间线比例均用于通过碰撞辐射原子物理代码SCRAM来计算局部T-e [Hansen等人，High Energy Density Phys 3，109（2007）]。使用侧面X射线成像测量中Z点从囊体表面消融并向激光入射孔（LEH）移动时的轨迹，以表征消融囊体的血浆流。数据显示，与使用HYDRA进行的辐射流体动力学模拟预测相比，测得的点位置距离LEH更远[Marinak等，Phys。 Plasmas 3，2070（1996）]。为了解决此差异，在测得的点轨迹处评估了预测的模拟T-e。测得的峰值T-e为4.2 keV +/- 0.2 keV，比模拟预测高0.5 keV。由AIP Publishing发布。

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