Matter and Radiation at Extremes

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Transport properties of warm and hot dense iron from orbital free and corrected Yukawa potential molecular dynamics
Matter and Radiation at Extremes - Tập 2 - Trang 287-295 - 2017
H.Y. Sun, Dongdong Kang, Yong Hou, J.Y. Dai
The equation of states, diffusions, and viscosities of strongly coupled Fe at 80 and 240 eV with densities from 1.6 to 40 g/cm3 are studied by orbital-free molecular dynamics, classical molecular dynamics with a corrected Yukawa potential and compared with the results from average atom model. A new local pseudopotential is generated for orbital free calculations. For low densities, the Yuk...... hiện toàn bộ
Dynamics of N5+-H electron capture in Debye plasmas
Matter and Radiation at Extremes - Tập 1 - Trang 114-122 - 2016
L. Liu, J.G. Wang
The electron capture in N5+-H collisions imbedded in a Debye plasma is studied by using the two-center atomic orbital close-coupling method in the energy range from 1 keV/u to 200 keV/u. The atomic orbitals and electron binding energies of atomic states are calculated within the Debye–Hückel approximation of the screened Coulomb potential and used in atomic orbital close-coupling dynamics ...... hiện toàn bộ
Optimization of hole-boring radiation pressure acceleration of ion beams for fusion ignition
Matter and Radiation at Extremes - Tập 3 - Trang 28-39 - 2018
S.M. Weng, Z.M. Sheng, M. Murakami, M. Chen, M. Liu, H.C. Wang, T. Yuan, J. Zhang
In contrast to ion beams produced by conventional accelerators, ion beams accelerated by ultrashort intense laser pulses have advantages of ultrashort bunch duration and ultrahigh density, which are achieved in compact size. However, it is still challenging to simultaneously enhance their quality and yield for practical applications such as fast ion ignition of inertial confinement fusion....... hiện toàn bộ
A general comparison between tokamak and stellarator plasmas
Matter and Radiation at Extremes - Tập 1 - Trang 192-200 - 2016
Yuhong Xu
This paper generally compares the essential features between tokamaks and stellarators, based on previous review work individually made by authors on several specific topics, such as theories, bulk plasma transport and edge divertor physics, along with some recent results. It aims at summarizing the main results and conclusions with regard to the advantages and disadvantages in these two t...... hiện toàn bộ
Conceptual design of a 15-TW pulsed-power accelerator for high-energy-density—physics experiments
Matter and Radiation at Extremes - Tập 2 - Trang 204-223 - 2017
R.B. Spielman, D.H. Froula, G. Brent, E.M. Campbell, D.B. Reisman, M.E. Savage, M.J. Shoup, W.A. Stygar, M.L. Wisher
We have developed a conceptual design of a 15-TW pulsed-power accelerator based on the linear-transformer-driver (LTD) architecture described by Stygar [W. A. Stygar et al., Phys. Rev. ST Accel. Beams 18, 110401 (2015)]. The driver will allow multiple, high-energy-density experiments per day in a university environment and, at the same time, will enable both fundamental and integrated expe...... hiện toàn bộ
Effects of mode coupling between low-mode radiation flux asymmetry and intermediate-mode ablator roughness on ignition capsule implosions
Matter and Radiation at Extremes - Tập 2 - Trang 9-15 - 2017
Jianfa Gu, Zhensheng Dai, Shiyang Zou, Wenhua Ye, Wudi Zheng, Peijun Gu, Shaoping Zhu
The low-mode shell asymmetry and high-mode hot spot mixing appear to be the main reasons for the performance degradation of the National Ignition Facility (NIF) implosion experiments. The effects of the mode coupling between low-mode P2 radiation flux asymmetry and intermediate-mode L = 24 capsule roughness on the implosion performance of ignition capsule are investigated by two-dimensiona...... hiện toàn bộ
Intensities and shifts of Lyman and Balmer lines of hydrogen-like ions in high density plasmas
Matter and Radiation at Extremes - Tập 3 - Trang 300-311 - 2018
G.P. Zhao, L. Liu, J.G. Wang, R.K. Janev, J. Yan
The spectral line intensities and line shifts of Lyman and Balmer series for transitions up to n = 5 of hydrogen-like ion are studied in plasmas with densities and temperatures in the ranges ne ∼ 1018–1021 cm−3, Te = 0.3–1.2 eV respectively. The screened potential used to describe the interaction between charged particles includes the electron exchange-correlation and finite-temperature gr...... hiện toàn bộ
In situ determination of crystal structure and chemistry of minerals at Earth's deep lower mantle conditions
Matter and Radiation at Extremes - Tập 2 - Trang 117-128 - 2017
Hongsheng Yuan, Li Zhang
Non-equilibrium between ions and electrons inside hot spots from National Ignition Facility experiments
Matter and Radiation at Extremes - Tập 2 - Trang 3-8 - 2017
Zhengfeng Fan, Yuanyuan Liu, Bin Liu, Chengxin Yu, Ke Lan, Jie Liu
The non-equilibrium between ions and electrons in the hot spot can relax the ignition conditions in inertial confinement fusion [Fan et al., Phys. Plasmas 23, 010703 (2016)], and obvious ion-electron non-equilibrium could be observed by our simulations of high-foot implosions when the ion-electron relaxation is enlarged by a factor of 2. On the other hand, in many shots of high-foot implos...... hiện toàn bộ
Stimulated Raman scattering excited by incoherent light in plasma
Matter and Radiation at Extremes - Tập 2 - Trang 190-196 - 2017
Yao Zhao, Suming Weng, Min Chen, Jun Zheng, Hongbin Zhuo, Zhengming Sheng
Stimulated Raman scattering (SRS) excited by incoherent light is studied via particle-in-cell simulations. It is shown that a large bandwidth of incoherent light can reduce the growth of SRS and electron heating considerably in the linear stage. However, different components of the incoherent light can be coupled by the Langmuir waves, so that stimulated Raman backward scattering can devel...... hiện toàn bộ
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