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p_a_broad_coverage_neutron_source_for_security_inspections_v2.pdf2007-04-02 15:20:01George Miley

Line Source of Neutrons/X-rays Based on a Unique Cylindrical IEC Fusion Device

Author: George H Miley
Requested Type: Poster Only
Submitted: 2006-12-18 22:15:19

Co-authors: L. Wu, T. Dolan, H. Momota, and P. J. Shrestha

Contact Info:
U of Illinois
103 S. Goodwin Ave.
Urbana, IL   61801
United States

Abstract Text:
An integrated broad area coverage neutron/x-ray interrogation unit is proposed here to meet a variety of security inspection needs[1,2]. This system uses a unique cylindrical Inertial Electrostatic Confinement (IEC) device which operates with either DD or DT fusion to provide two energies of neutron [2,3]. Based on experimental results, it is predicted that a system of three compact pulsed neutron/x-ray line source can produce ~2x10*10 n/s 14.1-MeV D-T neutrons, ~10*8 n/s 2.45-MeV D-D neutrons and 80 kV x-rays. This combination of neutron energies and x-rays offers improved accuracy for interrogation of objects.
Unlike prior neutron activation systems, this unit provides a long line-like emission source to obtain broad coverage, providing very fast scan time for even large objects. The use of combined multi-component radiation sources, along with a 3-D detector array and fuzzy logic analysis system, provide high elemental identification accuracy This in turn greatly decreases false signals so commonly encountered in prior inspection systems. Analysis techniques will employ both thermal neutron analysis (TNA) and pulsed fast neutron analysis (PFNA), accompanied by broad area x-ray imaging techniques. This presentation will focus on the plasma physics of the multiple IEC units.

[1] G H. Miley, "New Spin-Off Applications as Part of the Development Path for IEC Fusion," Current Trends in International Fusion Research – Proceedings of the Third Symposium; edited by E. Panarella.NRC Research Press, National Research Council of Canada, Ottawa Canada, p. 547 (1999)
[2] L. Wu, G.H. Miley, H. Momota, and P. J. Shrestha, “An Integrated Broad Area Coverage Fusion Neutron/X-Ray Interrogation Unit”, 17th ANS TOFE Meeting, Albuquerque NM, Nov. 12-16, 2006
[3] T. J. Dolan, “Electrostatic-Inertial Plasma Confinement”, PhD Thesis, NE Department, University of Illinois at Urbana-Champaign, IL (1970)
[4] R. A. Stubbers, and G. H. Miley, “A 2D (r-theta) 3v Monte Carlo Model of a Discharge-Type RC-IEC Fusion Device,” Blt. APS, 44th Mtg Division of Plasma Physics, Orlando, Florida, Vol. 47, No. 9, p. 291, November 11-15 (2002).

Characterization: C

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University of Maryland

Innovative Confinement Concepts Workshop
February 12-14, 2007
College Park, Maryland

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