Numerical studies on the radiation uniformity of Z-pinch dynamic hohlraum

Matter and Radiation at Extremes - Tập 3 - Trang 248-255 - 2018
Fuyuan Wu1,2,3, Yanyun Chu2, Rafael Ramis3, Zhenghong Li2, Yanyun Ma1,4, Jianlun Yang2, Zhen Wang2, Fan Ye2, Zhanchang Huang2, Jianmin Qi2, Lin Zhou2, Chuan Liang2, Shijia Chen1, Zheyi Ge1, Xiaohu Yang1, Shangwu Wang1
1College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
2Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
3E.T.S.I. Aeronáuticos y del Espacio, Universidad Politécnica de Madrid, Madrid, 28040, Spain
4IFSA Collaborative Innovation Center, Shanghai Jiao Tong Univeristy, Shanghai, 200240, China

Tóm tắt

Radiation uniformity is important for Z-pinch dynamic hohlraum driven fusion. In order to understand the radiation uniformity of Z-pinch dynamic hohlraum, the code MULTI-2D with a new developed magnetic field package is employed to investigate the related physical processes on Julong-I facility with drive current about 7–8 MA. Numerical simulations suggest that Z-pinch dynamic hohlraum with radiation temperature more than 100 eV can be created on Julong-I facility. Although some X-rays can escape out of the hohlraum from Z-pinch plasma and electrodes, the radiation field near the foam center is quite uniform after a transition time. For the load parameters used in this paper, the transition time for the thermal wave transports from r = 1 mm to r = 0 mm is about 2.0 ns. Implosion of a testing pellet driven by cylindrical dynamic hohlraum shows that symmetrical implosion is hard to achieve due to the relatively slow propagation speed of thermal wave and the compression of cylindrical shock in the foam. With the help of quasi-spherical implosion, the hohlraum radiation uniformity and corresponding pellet implosion symmetry can be significantly improved thanks to the shape modulation of thermal wave front and shock wave front.

Tài liệu tham khảo

2004, The physics basis for ignition using indirect-drive targets on the National Ignition Facility, Phys. Plasmas, 11, 339, 10.1063/1.1578638 2016, Progress in octahedral spherical hohlraum study, Matter. Radiat. Extremes, 1, 8, 10.1016/j.mre.2016.01.003 2016, Review of heavy-ion inertial fusion physics, Matter. Radiat. Extremes, 1, 89, 10.1016/j.mre.2016.03.003 2005, Development path for Z-pinch IFE, Fusion Sci. Technol., 47, 1147, 10.13182/fst05-a841 1998, Tungsten wire-array Z-pinch experiments at 200 TW and 2 MJ, Phys. Plasmas, 5, 2105, 10.1063/1.872881 2004, Production of thermonuclear neutrons from deuterium-filled capsule implosions driven by Z-pinch dynamic hohlraums, Phys. Rev. Lett., 93, 015001, 10.1103/physrevlett.93.015001 2007, High performance capsule implosions driven by the Z-pinch dynamic hohlraum, Plasma Phys. Controlled Fusion, 49, B591, 10.1088/0741-3335/49/12b/s55 2015, Conceptual designs of two petawatt-class pulsed-power accelerators for high-energy-density-physics experiments, Phys. Rev. Spec. Top.--Accel. Beams, 18, 110401, 10.1103/PhysRevSTAB.18.110401 2005, Amplitude reduction of nonuniformities induced by magnetic Rayleigh–Taylor instabilities in Z-pinch dynamic hohlraums, Phys. Plasmas, 12, 012703, 10.1063/1.1819936 2006, Integrated two-dimensional simulations of dynamic hohlraum driven inertial fusion capsule implosions, Phys. Plasmas, 13, 102701, 10.1063/1.2354587 2016, From concept to reality—A review to the primary test stand and its preliminary application in high energy density physics, Matter. Radiat. Extremes, 1, 48, 10.1016/j.mre.2016.01.004 2015, Numerical studies on the formation process of Z-pinch dynamic hohlruams and key issues of optimizing dynamic hohlraum radiation, Acta Phys. Sin., 64, 235203, 10.7498/aps.64.235203 2016, Theoretical and numerical research of wire array Z-pinch and dynamic hohlraum at IAPCM, Matter. Radiat. Extremes, 1, 135, 10.1016/j.mre.2016.06.001 2017, Radiation characteristics and implosion dynamics of Z-pinch dynamic hohlraums performed on PTS facility, Phys. Plasmas, 24, 092704, 10.1063/1.4998619 2017, Measurement of axial radiation properties in Z-pinch dynamic hohlraum at Julong-1, Phys. Plasmas, 24, 014505, 10.1063/1.4974771 2017, Numerical simulation of the interaction between Z-pinch plasma and foam converter using code MULTI, Fusion Sci. Technol., 10.1080/15361055.2017.1347458 2009, MULTI2D—a computer code for two-dimensional radiation hydrodynamics, Comput. Phys. Commun., 180, 977, 10.1016/j.cpc.2008.12.033 2017, A conservative MHD scheme on unstructured Lagrangian grids for Z-pinch hydrodynamic simulations, J. Comput. Phys., 10.1016/j.jcp.2017.12.014 2001, Scaling and optimization of the radiation temperature in dynamic hohlraums, Phys. Plasmas, 8, 1673, 10.1063/1.1360213 2005, Design, simulation, and application of quasi-spherical 100 ns Z-pinch implosions driven by tens of mega-amperes, Phys. Plasmas, 12, 052705, 10.1063/1.1890945 2005, Increase in radiation intensity in a quasi-spherical double liner/dynamic hohlraum system, JETP Lett, 81, 442, 10.1134/1.1984026 2009, Current implosion of quasi-spherical wire arrays, JETP Lett, 89, 315, 10.1134/s0021364009070017 2012, Simulation of the quasi-spherical wire-array implosion dynamics based on a multi-element model, Plasma Phys. Controlled Fusion, 54, 105020, 10.1088/0741-3335/54/10/105020 2015, Realization of quasi-spherical implosion using pre-shaped prolate wire arrays with a compression foam target inside, Phys. Plasmas, 22, 020703, 10.1063/1.4905229 2016, MULTI-IFE—A one-dimensional computer code for Inertial Fusion Energy (IFE) target simulations, Comput. Phys. Commun., 203, 226, 10.1016/j.cpc.2016.02.014 2017, One-dimensional numerical investigation on the formation of Z-pinch dynamic hohlraum using the code MULTI, Acta Phys. Sin., 66, 215201, 10.7498/aps.66.215201 1996, Improved symmetry greatly increases X-ray power from wire-array Z-pinches, Phys. Rev. Lett., 77, 5063, 10.1103/physrevlett.77.5063 2002, Snowplow-like behavior in the implosion phase of wire array Z pinches, Phys. Plasmas, 9, 2293, 10.1063/1.1466466 2012, Wire ablation dynamics model and its application to imploding wire arrays of different geometries, Phys. Rev. E, 86, 046404, 10.1103/physreve.86.046404 2002, Theoretical studies of aluminum wire array Z-pinch implosions with varying masses and radii, Eur. Phys. J. Appl. Phys., 19, 103, 10.1051/epjap:2002055 2002, X-ray imaging measurements of capsule implosions driven by a Z-pinch dynamic hohlraum, Phys. Rev. Lett., 89, 095004, 10.1103/physrevlett.89.095004 2015, Numerical investigation on target implosions driven by radiation ablation and shock compression in dynamic hohlraums, Phys. Plasmas, 22, 052709, 10.1063/1.4921332 1999, High-temperature dynamic hohlraums on the pulsed power driver Z, Phys. Plasmas, 6, 2023, 10.1063/1.873457
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Matter and Radiation at Extremes

Tập 3

248-255

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