Application of a velocity interferometer to high-speed phenomena

Wim C. Prinse; Lun K. Cheng; H. J. Verbeek; Anastasius J.A. Bruinsma; A. C. v.d. Steen

doi:10.1117/12.273409

28 May 1997 Application of a velocity interferometer to high-speed phenomena

Wim C. Prinse, Lun K. Cheng, H. J. Verbeek, Anastasius J.A. Bruinsma, A. C. v.d. Steen

Proceedings Volume 2869, 22nd International Congress on High-Speed Photography and Photonics; (1997) https://doi.org/10.1117/12.273409
Event: 22nd International Congress on High-Speed Photography and Photonics, 1996, Santa Fe, NM, United States

Abstract

We have developed a Fabry-Perot Velocity Interferometer System (F-PVIS) to measure the velocity of materials, moving with very high speeds. The F-PVIS has e.g. been applied to measure the velocity of a flyer launched by an electric gun. This gun is capable of accelerating thin plastic flyers to very high velocities (up to 8 km/s). The velocity measuring system consists of a one Watt laser, a Fabry-Perot etalon with lenses, a rotating-mirror streak camera and fiber optics to optically connect the laser and the F-P etalon to the object to be measured. The total system very efficiently handles the available light, and is able to measure velocities in the range of 100 m/s to several km/s. Currently we are able to perform two kinds of velocity measurements: (1) The evolution of the velocity of the flyer during the acceleration process. This kind of measurement is performed to calibrate the velocity of the flyer as a function of the voltage on the capacitor bank of the electric gun and as a function of the thickness, diameter and specific mass of the flyer. (2) The time resolved particle velocity at the interface of a sample, subjected to a shock wave, and a transparent material like PMMA or quartz. From the interface velocity the pressure in the sample can be determined, both for inert, solid materials and for detonating substances. With a minor modification in the above mentioned set-up we can also measure the particle velocity in a ceramic powder. Recently we also succeeded in measuring the particle velocity of the tip of a multimode quartz fiber, inserted into an explosive sample. Interpretation of this measurement is still a problem.

Citation Download Citation

Wim C. Prinse, Lun K. Cheng, H. J. Verbeek, Anastasius J.A. Bruinsma, and A. C. v.d. Steen "Application of a velocity interferometer to high-speed phenomena", Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); https://doi.org/10.1117/12.273409

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