Optical Thomson scattering measurements of cylindrical wire array parameters

被引：20

作者：

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

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

Patankar, S. ^{[1
]}

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

Burdiak, G. ^{[1
]}

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

Colaitis, A. ^{[1
]}

De Grouchy, P. ^{[1
]}

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

Khoory, E. ^{[1
]}

Hohenberger, M. ^{[2
]}

Pickworth, L. ^{[1
]}

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

Smith, R. A. ^{[1
]}

Skidmore, J. ^{[1
]}

Suttle, L. ^{[1
]}

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

机构：

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

[2] Univ Rochester, Dept Mech Engn, Rochester, NY 14627 USA

来源：

PHYSICS OF PLASMAS | 2012年 / 19卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

IMPLOSION DYNAMICS; SIMULATIONS; POWER;

D O I：

10.1063/1.3694671

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 Thomson scattering diagnostic has been used to measure the parameters of cylindrical wire array Z pinch plasmas. The scattering operates in the collective regime (alpha > 1) allowing spatially localised measurements of the ion or electron plasma temperatures and of the plasma bulk velocity. The ablation flow is found to accelerate towards the axis reaching peak velocities of 1.2-1.3 x 10(7) cm/s in aluminium and similar to 1 x 10(7) cm/s in tungsten arrays. Measurements of the precursor ion temperature shortly after formation are found to correspond to the kinetic energy of the converging ablation flow. Measurements during the implosion phase of tungsten arrays show the main imploding mass reaches velocities of similar to 1.4-1.7 x 10(7) cm/s and is non-zero even at large radii close to the start of the x-ray pulse indicating current flow in the trailing mass. (C) 2012 American Institute of Physics.

引用

页数：10

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