Forsman A C, Kyrala G A
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 May;63(5 Pt 2):056402. doi: 10.1103/PhysRevE.63.056402. Epub 2001 Apr 17.
Velocity interferometer system for any reflectors (VISARs), are becoming increasingly popular in the measurement of shock waves in solids and liquids. VISAR techniques are used in measurements of transit time, speed of shock waves in flight in transparent media [L. C. Chhabildas and J. L. Wise, in Proceedings of the 4th APS Topical Conference on Shock Waves in Condensed Matter, Spokane, Washington, 1985, edited by Y. M. Gupta (Plenum, New York, 1986); P. M. Celliers et al., Appl. Phys. Lett. 73, 1320 (1998)], and in measurements of particle velocity. However, in cases where shock compression or release may change the index of refraction n+ik of the material being studied, the VISAR technique must be applied with care. Changes in n and k introduce phase shifts into the VISAR results that are not associated with changes in velocity. This paper presents a derivation of the theoretical output of a line VISAR that includes the effects of changing n and k and an experimental observation of a non-Doppler shift related effect.
适用于任何反射体的速度干涉仪系统（VISAR）在固体和液体中的冲击波测量中越来越受欢迎。VISAR技术用于测量透明介质中冲击波飞行的渡越时间、速度[L.C. Chhabildas和J.L. Wise，发表于《第四届凝聚态物质冲击波APS专题会议论文集》，华盛顿州斯波坎，1985年，由Y.M. Gupta编辑（Plenum出版社，纽约，1986年）；P.M. Celliers等人，《应用物理快报》73，1320（1998年）]，以及用于粒子速度测量。然而，在冲击波压缩或释放可能改变所研究材料的折射率n + ik的情况下，必须谨慎应用VISAR技术。n和k的变化会给VISAR结果引入与速度变化无关的相移。本文给出了线VISAR理论输出的推导，其中包括n和k变化的影响，以及对一种非多普勒频移相关效应的实验观察。
