Acquisition of Digital Imaging Capability for Shock Wave Laboratory

1050269这项资助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冲击波的弹丸速度和旅行时间。目前使用的高速宝丽来速溶胶片已不再生产，他们的胶片供应正在减少。除了用于现有条纹相机的大幅面CCD探测器外，将支持的撞击实验室的其他升级包括两支大型撞击枪的X射线成像板和扫描系统、能够进行高速拍摄的中央枪托、制造新的多通道光学高温计、氦泄漏检测器、高容量活塞式真空泵和高精度双量程分析天平。所要求的改进将支持由国家科学基金会资助的以下地幔相固相和液体组成的热状态方程的表征、这些相的稳定场的确定以及过渡金属在核心条件下的弹性测量的研究。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，它是致力于研究地球深部冲击波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人员的重要培训基地。*

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.***