Abstract

Small-aspect-ratio cylindrical liner implosion on timescales of the order of hundreds of nanoseconds is important in the fields of high-energy-density physics, implosion dynamics, and inertial confinement fusion. This paper describes the design and development of a cylindrical liner load that has a low inductance and uniform magnetic field and its application in the CQ7 compact pulsed power generator. The dynamic response properties and implosion symmetry of liners with aspect ratios ranging from 5 to 9 are investigated. The experimental results show that the azimuthal symmetry of the liner remains intact, and that a liner with an inner diameter of 6.2 mm and a thickness of 0.4 mm can be accelerated up to 10 km/s before the reflected beam is lost. The demonstrated high performance of the experimental technique used for imploding the liner could be beneficial for studying the implosion and dynamics of materials on compact pulse power generators in the future.

Highlights

  • In 2010, the pulsed power Inertial Confinement Fusion (ICF) program at Sandia National Laboratories, USA, known as Magnetized Liner Inertial Fusion (MagLIF), suggested that liner implosions with magnetized and preheated fuel could be an interesting path toward economical fusion

  • This paper describes a technique for investigating small-aspectratio (AR) cylindrical liner implosion on timescales of the order of hundreds of nanoseconds using the CQ7 compact pulsed power generator

  • The azimuthal symmetry was characterized by means of a high-speed laser photography system and velocimetry

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Summary

INTRODUCTION

Driven liners have been widely used in the field of high-energy-density physics, implosion dynamics, inertial confinement fusion, and strong-magnetic-field physics. In 2010, the pulsed power Inertial Confinement Fusion (ICF) program at Sandia National Laboratories, USA, known as Magnetized Liner Inertial Fusion (MagLIF), suggested that liner implosions with magnetized and preheated fuel could be an interesting path toward economical fusion. Data regarding the liner stability are fundamental to magnetically driven systems.. Driven liners have been widely used in the field of high-energy-density physics, implosion dynamics, inertial confinement fusion, and strong-magnetic-field physics.. In 2010, the pulsed power Inertial Confinement Fusion (ICF) program at Sandia National Laboratories, USA, known as Magnetized Liner Inertial Fusion (MagLIF), suggested that liner implosions with magnetized and preheated fuel could be an interesting path toward economical fusion.. A series of experiments has investigated the liner stability, material dynamics, and even the magnetized liner inertial fusion concept using the pulsed power driver Z-machine at Sandia National Laboratories.. This paper describes a technique for investigating small-aspectratio (AR) cylindrical liner implosion on timescales of the order of hundreds of nanoseconds using the CQ7 compact pulsed power generator.

EXPERIMENTAL TECHNIQUE
DYNAMIC RESPONSE OF LINER IMPLOSION
8.75 Aluminum
AZIMUTHAL IMPLOSION SYMMETRY
Findings
CONCLUSIONS
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