skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Application of Fabry--Perot velocimeter to high-speed experiments

Abstract

The Fabry--Perot (F--P) velocimeter is a useful instrument for measuring the velocity of objects at speeds ranging from fractions of a kilometer per second to a few tens of kilometers per second and up. Because of its immunity to electromagnetic interference and its velocity resolution, it has become the prime diagnostic tool in our electric-gun facility. Examples of its application to high-speed experiments include the following areas: Electric-gun flyer studies; Spallation of materials under high-speed impact; Momentum-transfer studies; Pressure pulse created by high-velocity impact; Detonation-wave studies in high-explosive experiments. The F--P velocimeter at Lawrence Livermore National Laboratory (LLNL) includes a long-pulse laser amplifier, two-channel recording capability, air or fiber-optic transport of laser light, light enhancement through the F--P proper, and an electronic streaking camera with microchannel-plate intensifier. Data reduction includes a digitizing system that employs a video camera and a personal computer for manipulating fringe curves and calculating velocities. Software corrects distortions from the streak camera used to generate the record. Our system yields a velocity measurement with an accuracy of 1 to 2%. 11 refs., 7 figs.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
6775240
Report Number(s):
UCRL-98483; CONF-8808103-3
ON: DE88016269
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 18. international congress on high-speed photography and photonics, Xian, China, 28 Aug 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; VELOCIMETERS; ELECTRON GUNS; EXPLOSIONS; FABRY-PEROT INTERFEROMETER; FLOWSHEETS; IMPACT SHOCK; IMPACT TESTS; MOMENTUM TRANSFER; NUMERICAL DATA; OPTICAL FIBERS; SPALLATION; SPALLATION FRAGMENTS; STREAK CAMERAS; CAMERAS; DATA; DIAGRAMS; FIBERS; INFORMATION; INTERFEROMETERS; MATERIALS TESTING; MEASURING INSTRUMENTS; MECHANICAL TESTS; NUCLEAR FRAGMENTS; NUCLEAR REACTIONS; RADIATION DETECTORS; TESTING; 440300* - Miscellaneous Instruments- (-1989); 450100 - Military Technology, Weaponry, & National Defense- Chemical Explosions & Explosives

Citation Formats

Chau, H H, McMillan, C F, and Osher, J E. Application of Fabry--Perot velocimeter to high-speed experiments. United States: N. p., 1988. Web.
Chau, H H, McMillan, C F, & Osher, J E. Application of Fabry--Perot velocimeter to high-speed experiments. United States.
Chau, H H, McMillan, C F, and Osher, J E. Mon . "Application of Fabry--Perot velocimeter to high-speed experiments". United States.
@article{osti_6775240,
title = {Application of Fabry--Perot velocimeter to high-speed experiments},
author = {Chau, H H and McMillan, C F and Osher, J E},
abstractNote = {The Fabry--Perot (F--P) velocimeter is a useful instrument for measuring the velocity of objects at speeds ranging from fractions of a kilometer per second to a few tens of kilometers per second and up. Because of its immunity to electromagnetic interference and its velocity resolution, it has become the prime diagnostic tool in our electric-gun facility. Examples of its application to high-speed experiments include the following areas: Electric-gun flyer studies; Spallation of materials under high-speed impact; Momentum-transfer studies; Pressure pulse created by high-velocity impact; Detonation-wave studies in high-explosive experiments. The F--P velocimeter at Lawrence Livermore National Laboratory (LLNL) includes a long-pulse laser amplifier, two-channel recording capability, air or fiber-optic transport of laser light, light enhancement through the F--P proper, and an electronic streaking camera with microchannel-plate intensifier. Data reduction includes a digitizing system that employs a video camera and a personal computer for manipulating fringe curves and calculating velocities. Software corrects distortions from the streak camera used to generate the record. Our system yields a velocity measurement with an accuracy of 1 to 2%. 11 refs., 7 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6775240}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {8}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: