Design, construction, alignment, and calibration of a compact velocimetry experiment

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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 ... continued below

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667607-667607-11

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Kaufman, Morris I.; Malone, Robert M.; Frogget, Brent C.; Romero, Vincent T.; Esquibel, David L.; Iverson, Adam et al. August 31, 2007.

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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.

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667607-667607-11

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  • Journal Name: Optical System Alignment and Tolerancing. Edited by Sasian, José M.; Ruda, Mitchell C. Proceedings of the SPIE, (2007).; Journal Volume: 6676; Conference: 2007 SPIE Optics and Photonics Conference; San Diego, CA; August 26-30, 2007

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  • Report No.: DOE/NV/25946--131
  • Grant Number: DE-AC52-06NA25946
  • DOI: 10.1117/12.732233 | External Link
  • Office of Scientific & Technical Information Report Number: 946609
  • Archival Resource Key: ark:/67531/metadc893778

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  • August 31, 2007

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 16, 2016, 12:34 p.m.

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Kaufman, Morris I.; Malone, Robert M.; Frogget, Brent C.; Romero, Vincent T.; Esquibel, David L.; Iverson, Adam et al. Design, construction, alignment, and calibration of a compact velocimetry experiment, article, August 31, 2007; United States. (digital.library.unt.edu/ark:/67531/metadc893778/: accessed June 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.