Kroupp E, Osin D, Starobinets A, Fisher V, Bernshtam V, Maron Y, Uschmann I, Förster E, Fisher A, Deeney C
Weizmann Institute of Science, Rehovot 76100, Israel.
Phys Rev Lett. 2007 Mar 16;98(11):115001. doi: 10.1103/PhysRevLett.98.115001. Epub 2007 Mar 14.
The ion-kinetic energy throughout K emission in a stagnating plasma was determined from the Doppler contribution to the shapes of optically thin lines. X-ray spectroscopy with a remarkably high spectral resolution, together with simultaneous imaging along the pinch, was employed. Over the emission period, a drop of the ion-kinetic energy down to the electron thermal energy was seen. Axially resolved time-dependent electron-density measurements and absolute intensities of line and continuum allowed for investigating, for the first time, each segment of the pinch, the balance between the ion-kinetic energy at the stagnating plasma, and the total radiation emitted. Within the experimental uncertainties, the ion-kinetic energy is shown to account for the total radiation.
通过光学薄线形状的多普勒贡献确定了停滞等离子体中钾发射过程中的离子动能。采用了具有极高光谱分辨率的X射线光谱学，以及沿箍缩方向的同步成像。在发射期间，观察到离子动能下降至电子热能。轴向分辨的随时间变化的电子密度测量以及谱线和连续谱的绝对强度，首次使得对箍缩的每个部分、停滞等离子体处的离子动能与发射的总辐射之间的平衡进行研究成为可能。在实验不确定度范围内，离子动能被证明可解释总辐射。
