Acquisition of Digital Imaging Capability for Shock Wave Laboratory

1050269Asimow该拨款支持升级加州理工学院冲击波实验室，以允许数字捕获固体或液体样品中的弹丸速度和冲击波的传播时间。 目前使用的高速宝丽来即时胶片已不再生产，他们的胶片供应也越来越少。 除了现有条纹照相机的大幅面CCD探测器外，还将支持对撞击实验室进行其他升级，包括为两个大型撞击枪安装X射线成像板和扫描系统，一个能够进行高速射击的中央后膛，制造一个新的多通道光学高温计，一个氦泄漏探测器，一个大容量活塞式真空泵和一个高精度双量程分析天平。 所要求的增强将支持NSF资助的研究，即对下地幔相的固相和液体成分的热状态方程进行表征，并确定这些相的稳定性场，并测量过渡金属在核心条件下的弹性。 加州理工学院的冲击波实验室在美国学术界是独一无二的，它是一个致力于研究冲击波的地球深部地球物理问题的实验室，该实验室是下一代地球科学和行星科学工作者的重要培训基地。

1050269AsimowThis grant supports upgrade to the Caltech shock wave lab to allow for digital capture of projectile velocity and travel time of a shock in a solid or liquid sample. The high-speed Polaroid instant film currently used is no longer manufactured and their supply of the film is running low. In addition to a large-format CCD detector for the existing streak camera, other upgrades to the impact lab that will be supported include an X-ray image plate and scanning system for both of the large impact guns, a central breech to enable high-speed shots, fabrication of a new multichannel optical pyrometer, a Helium leak detector, a high-capacity piston-type vacuum pump, and a high-precision dual-range analytical balance. The requested enhancements will support NSF funded research on the characterization of the thermal Equation of State (EOS) of solid phases and liquid compositions of lower mantle phases and determination of the stability fields of these phases and measurement of the elasticity of transition metals at core conditions. The Caltech shock wave lab is unique in the U.S. academia as a lab dedicated to studying deep Earth geophysical problems with shock waves and the lab serves as an important training ground for the next generation geoscience and planetary science workforce.***