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You searched on: Author: lawrence hudson

Displaying records 21 to 30 of 87 records.
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21. Asymmetrically cut crystal pair as x-ray magnifier for imaging at high intensity laser facilities.
Published: 10/20/2010
Authors: Lawrence T Hudson, Albert Henins, C.I Szabo, Uri Feldman, John F Seely, John J Curry
Abstract: The potential of an x-ray magnifier prepared from a pair of asymmetrically cut crystals is studied to explore high energy x-ray imaging capabilities at high intensity laser facilities. OMEGA-EP and NIF when irradiating mid and high Z targets can be ...

22. Laser-produced MeV electrons and hard X-ray spectroscopic diagnostics
Published: 7/21/2010
Authors: Lawrence T Hudson, John F Seely
Abstract: A new spectroscopic technique for the measurement of the sizes of hard X-ray sources produced by the irradiation of solid-density targets by intense laser radiation is discussed. The technique is based on the source broadening of K shell spectral li ...

23. High contract femtosecond laser-driven intense hard X-ray source for imaging application
Published: 11/18/2009
Authors: Lawrence T Hudson, L.M Chen, W.M. Wang, M. Kando, F Liu, X.X. Lin, J.L Ma, Y.T. Li, S.V. Bulanvo, T. Tajima, Y. Kato, Z.M. Sheng, J Zhang
Abstract: In this report we address the current situation of laser-driven hard X-ray sources for imaging applications,especially the saturation of X-ray conversion efficiency and the serious impact upon imaging quality.By employing high contrast laser pulses ...

24. X-ray measurements at high-power lasers
Published: 5/1/2009
Authors: Lawrence T Hudson, C.I Szabo, Paul Indelicato, G.E. Gumberidze, G Holland, John F Seely, Albert Henins, M Audebert, S. Bastiani-Ceccotti, E. Tabakhoff, E. Brambrink
Abstract: Conversion efficiencies of laser light into K x-ray radiation are used to characterize laser-solid interactions e.g. in measurements with back-lighter targets in Inertial Confinement Fusion research or in ultra short x-ray science where ultra short l ...

25. Analysis of ISCD-NIST Survey for Bone Health
Published: 4/1/2009
Authors: Andrew M Dienstfrey, Tammy L. Oreskovic, Herbert S Bennett, Lawrence T Hudson
Abstract: In 2007, the National Institute of Standards and Technology and the International Society for Clinical Densitometry designed a survey to prioritize seven research and standardization action items intended to improve accuracy and cross-comparability o ...

26. Laser-produced X-Ray Sources
Published: 1/12/2009
Authors: Lawrence T Hudson, J Seely
Abstract: A formidable array of advanced laser systems are emerging that produce extreme states of light and matter. By irradiating solid and gaseous targets with lasers of increasing energy densities, new physical regimes of radiation effects are being explor ...

27. Development of backlighting sources for Compton radiography diagnostic of Inertial Confinement Fusion targets.
Published: 12/8/2008
Authors: Lawrence T Hudson, A. Tommasini, A MacPhee, D. Hey, T Ma, C. Chen, N Izimi, W Unites, A. MacKinnon, P. Hatchett, B.A. Remington, H.S. Park, P. Springer, J. Koch, O.L. Landen, John F Seely, G Holland
Abstract: We present scaled demonstrations of backlighter sources, emitting Bremsstrahlung x rays with photon energies above 75 keV, that we will use to record x-ray Compton radiographic snapshots of cold dense DT fuel in inertial confinement fusion implosions ...

28. High resolution 17 keV to 75 keV backlighers for high energy density experiments
Published: 11/6/2008
Authors: Lawrence T Hudson, H.S. Parks, B.R. Maddox, E. Giraldez, P. Hatchett, N. Izumi, M.H. Key, S. LePape, A. MacKinnon, A MacPhee, P.K. Patel, T.W. Phillips, B.A. Remington, John F Seely, A. Tommasini, R. Town, J. Workman
Abstract: We have developed 17 keV to 75 keV 1-dimensional and 2-dimensional high-resolution (<10 m) radiography using high-intensity short pulse lasers. High energy K- sources are created by fluorescence from hot electrons interacting in the target mate ...

29. ISCD-NIST DXA Survey: Preliminary Report
Published: 5/15/2008
Authors: Andrew M Dienstfrey, Tammy L. Oreskovic, Lawrence T Hudson, Herbert S Bennett
Abstract: This article reports and discusses briefly the preliminary results from the recent International Society for Clinical Densitometry (ISCD)-National Institute of Standards and Technology (NIST) dual-energy x-ray absorptiometry (DXA) Survey.  The 1074 S ...

30. In God We Trust, X-Ray Everything Else! Standards for X-Ray and Gamma-Ray Security Screening Systems
Published: 10/31/2007
Authors: Lawrence T Hudson, Stephen Michael Seltzer, Paul Mark Bergstrom, Frank Cerra
Abstract: A suite of technical performance standards is nearing completion that encompasses all the nation s security systems that screen using x-rays or gamma-rays. Specifically, these documentary standards address the aspects of imaging quality and radiation ...

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