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Author: lawrence hudson

Displaying records 11 to 20 of 80 records.
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11. Scaling studies with the dual crystal spectrometer at the OMEGA-EP laser facility
Published: 10/26/2010
Authors: Lawrence T Hudson, C.I Szabo, J. Workman, K. Flippo, U. Feldman, Albert Henins
Abstract: The dual crystal spectrometer (DCS) is an approved diagnostic at the OMEGA and the OMEGA-EP laser facilities for the measurement of high energy x-rays in the 11 90 keV energy range, e.g., for verification of the x-ray spectrum of backlighter target ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907469

12. 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, U. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907468

13. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907449

14. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907448

15. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842572

16. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890044

17. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901410

18. 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.A. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842500

19. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842501

20. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853595