Experimental Demonstration of the Stabilizing Effect of Dielectric Coatings on Magnetically Accelerated Imploding Metallic Liners

被引：82

作者：

Awe, T. J. ^{[1
]}

Peterson, K. J. ^{[1
]}

Yu, E. P. ^{[1
]}

McBride, R. D. ^{[1
]}

Sinars, D. B. ^{[1
]}

Gomez, M. R. ^{[1
]}

Jennings, C. A. ^{[1
]}

Martin, M. R. ^{[1
]}

Rosenthal, S. E. ^{[1
]}

Schroen, D. G. ^{[2
]}

Sefkow, A. B. ^{[1
]}

Slutz, S. A. ^{[1
]}

Tomlinson, K. ^{[2
]}

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

机构：

[1] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

[2] Gen Atom Co, San Diego, CA 92121 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 06期

关键词：

INSTABILITY; EXPLOSION; GROWTH;

D O I：

10.1103/PhysRevLett.116.065001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Enhanced implosion stability has been experimentally demonstrated for magnetically accelerated liners that are coated with 70 mu m of dielectric. The dielectric tamps liner-mass redistribution from electrothermal instabilities and also buffers coupling of the drive magnetic field to the magneto-Rayleigh-Taylor instability. A dielectric-coated and axially premagnetized beryllium liner was radiographed at a convergence ratio [CR = R-in,R-0/R-in (z, t)] of 20, which is the highest CR ever directly observed for a strengthless magnetically driven liner. The inner-wall radius R-in(z, t) displayed unprecedented uniformity, varying from 95 to 130 mu m over the 4.0 mm axial height captured by the radiograph.

引用

页数：5

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