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Title: Design, Construction, Alignment, and Calibration of a Compact Velocimetry Experiment

Abstract

A velocimetry experiment has been designed to measure shock properties for small cylindrical metal targets (8-mm-diameter by 2-mm thick). A target is accelerated by high explosives, caught, and retrieved for later inspection. The target is expected to move at a velocity of 0.1 to 3 km/sec. The complete experiment canister is approximately 105 mm in diameter and 380 mm long. Optical velocimetry diagnostics include the Velocity Interferometer System for Any Reflector (VISAR) and Photon Doppler Velocimetry (PDV). The packaging of the velocity diagnostics is not allowed to interfere with the catchment or an X-ray imaging diagnostic. A single optical relay, using commercial lenses, collects Doppler-shifted light for both VISAR and PDV. The use of fiber optics allows measurement of point velocities on the target surface during accelerations occurring over 15 mm of travel. The VISAR operates at 532 nm and has separate illumination fibers requiring alignment. The PDV diagnostic operates at 1550 nm, but is aligned and focused at 670 nm. The VISAR and PDV diagnostics are complementary measurements and they image spots in close proximity on the target surface. Because the optical relay uses commercial glass, the axial positions of the optical fibers for PDV and VISAR are offsetmore » to compensate for chromatic aberrations. The optomechanical design requires careful attention to fiber management, mechanical assembly and disassembly, positioning of the foam catchment, and X-ray diagnostic field-of-view. Calibration and alignment data are archived at each stage of the assembly sequence.« less

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Security Technologies, LLC
Sponsoring Org.:
USDOE - National Nuclear Security Administration (NNSA)
OSTI Identifier:
926623
Report Number(s):
DOE/NV/25946-250
Journal ID: ISSN 0277-786X; TRN: US0804186
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Conference
Journal Name:
Proceedings of SPIE
Additional Journal Information:
Journal Volume: 6676; Conference: 2007 SPIE Optics and Photonics Conference; San Diego, CA; August 26-30, 2007; Journal ID: ISSN 0277-786X
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALIGNMENT; CALIBRATION; CHEMICAL EXPLOSIVES; CHROMATIC ABERRATIONS; CONSTRUCTION; CONTAINERS; DESIGN; FIBER OPTICS; FIBERS; ILLUMINANCE; INTERFEROMETERS; LENSES; OPTICAL FIBERS; OPTICS; PACKAGING; PHOTONS; POSITIONING; TARGETS; VELOCITY; velocimetry, VISAR, PDV, calibration, alignment, photon budget, fiber optics

Citation Formats

Kaufman, Morris I., Malone, Robert M., Frogget, Brent C., Esquibel, David L., Romero, Vincent T., Lare, Gregory A., Briggs, Bart, Iverson, Adam J., Frayer, Daniel K., DeVore, Douglas, and Cata, Brian. Design, Construction, Alignment, and Calibration of a Compact Velocimetry Experiment. United States: N. p., 2007. Web. doi:10.1117/12.732233.
Kaufman, Morris I., Malone, Robert M., Frogget, Brent C., Esquibel, David L., Romero, Vincent T., Lare, Gregory A., Briggs, Bart, Iverson, Adam J., Frayer, Daniel K., DeVore, Douglas, & Cata, Brian. Design, Construction, Alignment, and Calibration of a Compact Velocimetry Experiment. United States. doi:10.1117/12.732233.
Kaufman, Morris I., Malone, Robert M., Frogget, Brent C., Esquibel, David L., Romero, Vincent T., Lare, Gregory A., Briggs, Bart, Iverson, Adam J., Frayer, Daniel K., DeVore, Douglas, and Cata, Brian. Fri . "Design, Construction, Alignment, and Calibration of a Compact Velocimetry Experiment". United States. doi:10.1117/12.732233. https://www.osti.gov/servlets/purl/926623.
@article{osti_926623,
title = {Design, Construction, Alignment, and Calibration of a Compact Velocimetry Experiment},
author = {Kaufman, Morris I. and Malone, Robert M. and Frogget, Brent C. and Esquibel, David L. and Romero, Vincent T. and Lare, Gregory A. and Briggs, Bart and Iverson, Adam J. and Frayer, Daniel K. and DeVore, Douglas and Cata, Brian},
abstractNote = {A velocimetry experiment has been designed to measure shock properties for small cylindrical metal targets (8-mm-diameter by 2-mm thick). A target is accelerated by high explosives, caught, and retrieved for later inspection. The target is expected to move at a velocity of 0.1 to 3 km/sec. The complete experiment canister is approximately 105 mm in diameter and 380 mm long. Optical velocimetry diagnostics include the Velocity Interferometer System for Any Reflector (VISAR) and Photon Doppler Velocimetry (PDV). The packaging of the velocity diagnostics is not allowed to interfere with the catchment or an X-ray imaging diagnostic. A single optical relay, using commercial lenses, collects Doppler-shifted light for both VISAR and PDV. The use of fiber optics allows measurement of point velocities on the target surface during accelerations occurring over 15 mm of travel. The VISAR operates at 532 nm and has separate illumination fibers requiring alignment. The PDV diagnostic operates at 1550 nm, but is aligned and focused at 670 nm. The VISAR and PDV diagnostics are complementary measurements and they image spots in close proximity on the target surface. Because the optical relay uses commercial glass, the axial positions of the optical fibers for PDV and VISAR are offset to compensate for chromatic aberrations. The optomechanical design requires careful attention to fiber management, mechanical assembly and disassembly, positioning of the foam catchment, and X-ray diagnostic field-of-view. Calibration and alignment data are archived at each stage of the assembly sequence.},
doi = {10.1117/12.732233},
journal = {Proceedings of SPIE},
issn = {0277-786X},
number = ,
volume = 6676,
place = {United States},
year = {2007},
month = {9}
}

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