The production and evolution of multiple converging radiative shock waves in gas-filled cylindrical liner z-pinch experiments

被引：17

作者：

Burdiak, G. C. ^{[1
,2
]}

Lebedev, S. V. ^{[1
]}

Drake, R. P. ^{[3
]}

Harvey-Thompson, A. J. ^{[1
]}

Swadling, G. F. ^{[1
]}

Suzuki-Vidal, F. ^{[1
]}

Skidmore, J. ^{[1
]}

Suttle, L. ^{[1
]}

Khoory, E. ^{[1
]}

Pickworth, L. ^{[1
]}

de Grouchy, P. ^{[1
]}

Hall, G. N. ^{[1
]}

Bland, S. N. ^{[1
]}

Weinwurm, M. ^{[1
]}

Chittenden, J. P. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England

[2] Univ London Imperial Coll Sci Technol & Med, Inst Shock Phys, London SW7 2BW, England

[3] Univ Michigan, Ann Arbor, MI 48109 USA

来源：

HIGH ENERGY DENSITY PHYSICS | 2013年 / 9卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Radiative shock; Z-pinch; Liner; Radiative precursor; Instabilities; BLAST WAVES; INSTABILITY;

D O I：

10.1016/j.hedp.2012.10.006

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A cylindrical liner z-pinch configuration has been used to drive converging radiative shock waves into different gases. On application of a 1.4 MA, 240 ns rise-time current pulse, a series of cylindrical shocks moving at typical velocities of 20 km s(-1) are consecutively launched from the inside liner wall into an initially static gas-fill of density similar to 10(-5) g cm(-3). The drive current skin depth calculated prior to resistive heating was slightly less than the liner wall thickness and no bulk liner implosion occurred. Axial laser probing images show the shock fronts to be smooth and azimuthally symmetric, with instabilities developing downstream of each shock. Evidence for a radiative precursor ahead of the first shock was seen in laser interferometry imaging and time-gated, spatially resolved optical spectroscopy. The interferometry diagnostic was able to simultaneously resolve the radiative precursor and the density jumps at the shock fronts. Optical streak photography provided information on shock timing and shock trajectories and was used to gain insight into the shock launching mechanisms. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：52 / 62

页数：11

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