Acquisition of Digital Imaging Capability for Shock Wave Laboratory

1050269asimow这项拨款支持升级到加州理工学院冲击波实验室，以允许在固体或液体样品中数字捕获弹丸速度和冲击的传播时间。目前使用的高速宝丽来速成胶片已经停产，他们的胶片供应也越来越少。除了用于现有条纹相机的大画幅CCD探测器外，撞击实验室的其他升级将得到支持，包括用于两个大型撞击枪的x射线图像板和扫描系统，用于高速射击的中央后膛，新型多通道光学高温计的制造，氦气泄漏探测器，高容量活塞式真空泵和高精度双量程分析天平。所要求的增强将支持NSF资助的关于下地幔固相和液体组成的热状态方程（EOS）表征的研究，以及这些相的稳定场的测定和核心条件下过渡金属弹性的测量。加州理工学院冲击波实验室在美国学术界是独一无二的，它致力于用冲击波研究地球深部地球物理问题，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.***