Dynamic-range studies and improvements for multiplexed photonic Doppler velocimetry

Conference · Wed Jul 01 00:00:00 EDT 2015 · Proceedings of the 19th Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter

DOI:https://doi.org/10.1063/1.4971745· OSTI ID:1329306

Miller, E. Kirk ^[1]; Lee, Kevin ^[2]; Larson, Eric ^[2]; Daykin, Edward ^[1]

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1. National Security Technologies, LLC. (NSTec), Mercury, NV (United States)
2. National Security Technologies, LLC. (NSTec), Mercury, NV (United States); Special Technologies Lab. (STL), Santa Barbara, CA (United States)

This paper presents studies of the dynamic range achievable with multiplexed photonic Doppler velocimetry (MPDV) measurements, and demonstrates techniques to extend the dynamic range. Improved dynamic range for MPDV measurements is needed in order to track the velocity of the free surface behind a cloud of ejecta. Therefore, the authors have undertaken theoretical and experimental studies of factors affecting dynamic range, particularly in cases where the large number of MPDV probe points precludes high illumination power on each channel. To quantify the potential dynamic range of a given MPDV configuration, they introduce a metric called the frequency-domain number of bits, FNOB, which is less stringent than the formally defined equivalent number of bits (ENOB). This new metric is simple to compute in the lab, and it is well suited to conventional PDV analysis, which does not require digitizer phase coherence beyond tens of nanoseconds.

• Research Organization: Nevada Test Site (NTS), Mercury, NV (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Security
• DOE Contract Number: DE-AC52-06NA25946
• OSTI ID: 1329306
• Report Number(s): DOE/NV/25946-2524
• Journal Information: Proceedings of the 19th Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter, Vol. 60, Issue 8; Conference: 19th Biennial Conference of the American Physical Society (APS) Topical Group on Shock Compression of Condensed Matter; June 14–19, 2015; Tampa, Florida
• Publisher: AIP Publishing, LLC [American Institute of Physics], Melville, New York
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
42 ENGINEERING
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
47 OTHER INSTRUMENTATION
multiplexed photonic Doppler velocimetry
MPDV
dynamic range
illumination power
frequency domain number of bits
equivalent number of bits
phase coherence