首页> 外文会议>Shock Compression of Condensed Matter―2001 >RECENT ADVANCES IN QUASI-ISENTROPIC COMPRESSION EXPERIMENTS (ICE) ON THE SANDIA Z ACCELERATOR
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RECENT ADVANCES IN QUASI-ISENTROPIC COMPRESSION EXPERIMENTS (ICE) ON THE SANDIA Z ACCELERATOR

机译:SANDIA Z加速器上的准等压实验(ICE)的最新进展

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The Z Accelerator is a pulsed power machine capable of delivering currents to loads of ~20 MA over times of 100-300 ns. This current produces smoothly increasing, time dependant magnetic pressures that can be applied to specimens allowing quasi-isentropes for these materials to be inferred. A new load design has been developed that allows this pressure to be uniformly applied to as many as 8 samples simultaneously. Diagnostics have recently been fielded that have resulted in an increased understanding of the magneto-hydrodynamic effects and our confidence in the utility of this experimental configuration for EOS measurements. Efforts are also underway on Z to provide a capability for shaping the pressure profile applied to the samples which should increase useful sample thicknesses to > 1mm by eliminating the formation of low-level shocks. In addition to direct measurements of quai-isentropic material response, the impulse from this loading technique has been demonstrated to launch macroscopic flyer plates to velocities of ~21 km/s for high-pressure Hugoniot studies. Results of ICE measurements on 6061-T6 aluminum to ~1 Mbar will be discussed.
机译:Z加速器是一种脉冲动力机器,能够在100-300 ns的时间内向〜20 MA的负载输送电流。该电流产生平稳增长的,随时间变化的磁压力,可以将其施加到样本上,从而可以推断出这些材料的准等熵。已经开发出一种新的负载设计,该负载设计可同时将此压力均匀地施加到多达8个样品上。最近,已经有了一些诊断方法,这些诊断方法使人们对磁流体动力效应有了更深入的了解,并且使我们对这种实验配置用于EOS测量的信心有所提高。 Z也在努力提供一种能力,以成形施加到样品上的压力曲线,从而通过消除低水平冲击的形成将有用的样品厚度增加到> 1mm。除了直接测量准等熵材料的响应外,还证明了这种加载技术的冲动可将宏观飞行器板发射到约21 km / s的速度,用于高压Hugoniot研究。将讨论6061-T6铝至〜1 Mbar的ICE测量结果。

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