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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 × 2 mm thick). A target is accelerated by high explosives, caught, then 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 ~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 foam catchment or an X-ray imaging diagnostic. Using commercial lenses, a single optical relay collects Doppler-shifted light for both VISAR and PDV. The use of fiber optics allows measurement of point velocities on the target surface for accelerations lasting for 3 mm of travel. Operating at 532 nm, the VISAR has separate illumination fibers requiring alignment. The PDV diagnostic operates at 1550 nm but is aligned and calibrated at 670 nm. VISAR and PDV diagnostics are complimentary measurements that image spots in close proximity on the target surface. Because the optical relay uses commercial glass, optical fibers’ axial positions are offset to compensate for chromatic aberrations. The optomechanicalmore » design requires careful attention to fiber management, mechanical assembly and disassembly, foam catchment design, and X-ray diagnostic field of view.Calibration and alignment data are archived at each assembly sequence stage. The photon budgets for the VISAR and PDV diagnostics are separately estimated.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Security Technologies, LLC
Sponsoring Org.:
USDOE National Nuclear Security Administration (NA)
OSTI Identifier:
946609
Report Number(s):
DOE/NV/25946-131
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Conference
Journal Name:
Optical System Alignment and Tolerancing. Edited by Sasian, José M.; Ruda, Mitchell C. Proceedings of the SPIE, (2007).
Additional Journal Information:
Journal Volume: 6676; Conference: 2007 SPIE Optics and Photonics Conference; San Diego, CA; August 26-30, 2007
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; velocimetry, VISAR, PDV, calibration, alignment, photon budget, fiber optics, optomechanics, fast VISAR, fast PDV

Citation Formats

Kaufman, Morris I., Malone, Robert M., Frogget, Brent C., Romero, Vincent T., Esquibel, David L., Iverson, Adam, Lare, Gregory A., Briggs, Bart, DeVore, Douglas, Cata, Brian, McGillivray, Kevin, Palagi, Martin, and et al.,. 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., Romero, Vincent T., Esquibel, David L., Iverson, Adam, Lare, Gregory A., Briggs, Bart, DeVore, Douglas, Cata, Brian, McGillivray, Kevin, Palagi, Martin, & et al.,. 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., Romero, Vincent T., Esquibel, David L., Iverson, Adam, Lare, Gregory A., Briggs, Bart, DeVore, Douglas, Cata, Brian, McGillivray, Kevin, Palagi, Martin, and et al.,. Fri . "Design, construction, alignment, and calibration of a compact velocimetry experiment". United States. doi:10.1117/12.732233. https://www.osti.gov/servlets/purl/946609.
@article{osti_946609,
title = {Design, construction, alignment, and calibration of a compact velocimetry experiment},
author = {Kaufman, Morris I. and Malone, Robert M. and Frogget, Brent C. and Romero, Vincent T. and Esquibel, David L. and Iverson, Adam and Lare, Gregory A. and Briggs, Bart and DeVore, Douglas and Cata, Brian and McGillivray, Kevin and Palagi, Martin and et al.,},
abstractNote = {A velocimetry experiment has been designed to measure shock properties for small, cylindrical, metal targets (8 mm diameter × 2 mm thick). A target is accelerated by high explosives, caught, then 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 ~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 foam catchment or an X-ray imaging diagnostic. Using commercial lenses, a single optical relay collects Doppler-shifted light for both VISAR and PDV. The use of fiber optics allows measurement of point velocities on the target surface for accelerations lasting for 3 mm of travel. Operating at 532 nm, the VISAR has separate illumination fibers requiring alignment. The PDV diagnostic operates at 1550 nm but is aligned and calibrated at 670 nm. VISAR and PDV diagnostics are complimentary measurements that image spots in close proximity on the target surface. Because the optical relay uses commercial glass, optical fibers’ axial positions are offset to compensate for chromatic aberrations. The optomechanical design requires careful attention to fiber management, mechanical assembly and disassembly, foam catchment design, and X-ray diagnostic field of view.Calibration and alignment data are archived at each assembly sequence stage. The photon budgets for the VISAR and PDV diagnostics are separately estimated.},
doi = {10.1117/12.732233},
journal = {Optical System Alignment and Tolerancing. Edited by Sasian, José M.; Ruda, Mitchell C. Proceedings of the SPIE, (2007).},
number = ,
volume = 6676,
place = {United States},
year = {2007},
month = {8}
}

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