Quantitative Measurements of Wire Ablation in Tungsten X-pinches at 80 kA

被引：12
|
作者：
Bott, Simon C. [1 ]
Haas, David M. [2 ]
Eshaq, Yossof [2 ]
Ueda, Utako [2 ]
Lebedev, Sergey V. [3 ,4 ]
Chittenden, Jeremy P. [3 ]
Palmer, James B. A. [5 ]
Bland, Simon N. [3 ]
Hall, Gareth N. [3 ]
Ampleford, David J. [6 ]
Beg, Farhat N. [2 ]
机构：
[1] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 93093 USA
[3] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Plasma Phys Grp, London SW7 2AZ, England
[4] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[5] AWE Plc, Dept Plasma Phys, Aldermaston RG7 4PR, England
[6] Sandia Natl Labs, Albuquerque, NM 87185 USA
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2008年 / 36卷 / 05期
基金：
英国工程与自然科学研究理事会;
关键词：
Precursor plasma; wire ablation; X-pinch;
D O I：
10.1109/TPS.2008.2003964
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：
This paper investigates the ablation of wires in two-wire tungsten X-pinches driven by an 80-kA current over 50 us. High-resolution imaging using a Nomarski interferometer allows measurements close to the X-pinch cross point, where the ablation "flare" structure is observed to clearly develop during the drive-current rise time. Electron density profiles are recovered as a function of both distance normal to the wire and of time. Results compare favorably to the rocket model of wire ablation. In addition, the density contrast over the ablation "stream" and "gap" structure is measured and compared to similar measurements made using quantitative radiography on the I-MA 250-ns MAGPIE generator at Imperial College London, London, U.K.
引用
收藏
页码：2759 / 2764
页数：6
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