An 800-MeV proton radiography facility for dynamic experiments

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Description

The capability has been successfully developed at the Los Alamos Nuclear Science Center (LANSCE) to utilize a spatially and temporally prepared 800-MeV proton beam to produce proton radiographs. A series of proton bursts are transmitted through a dynamically varying object and transported, via a unique magnetic lens system, to an image plane. The magnetic lens system permits correcting for the effects of multiple coulomb scattering which would otherwise completely blur the spatially transmitted information at the image plane. The proton radiographs are recorded on either a time integrating film plate or with a recently developed multi-frame electronic imaging camera system. ... continued below

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8 p.

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King, N.S.P.; Adams, K. & Ables, E. December 1, 1998.

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Description

The capability has been successfully developed at the Los Alamos Nuclear Science Center (LANSCE) to utilize a spatially and temporally prepared 800-MeV proton beam to produce proton radiographs. A series of proton bursts are transmitted through a dynamically varying object and transported, via a unique magnetic lens system, to an image plane. The magnetic lens system permits correcting for the effects of multiple coulomb scattering which would otherwise completely blur the spatially transmitted information at the image plane. The proton radiographs are recorded on either a time integrating film plate or with a recently developed multi-frame electronic imaging camera system. The latter technique permits obtaining a time dependent series of proton radiographs with time intervals (modulo 358 ns) up to many microseconds and variable time intervals between images. One electronically shuttered, intensified, CCD camera is required per image. These cameras can detect single protons interacting with a scintillating fiber optic array in the image plane but also have a dynamic range which permits recording radiographs with better than 5% statistics for observation of detailed density variations in the object. A number of tests have been carried out to characterize the quality of the proton radiography system for absolute mass determination, resolution, and dynamic range. Initial dynamic experiments characterized the temporal and spatial behavior of shock propagation in high explosives with up to six images per experiment. Based on experience with the prototype system, a number of upgrades are being implemented including the anticipated capability for enhanced mass discrimination through differential multiple coulomb scattering radiographs and more images with improved imaging techniques.

Physical Description

8 p.

Notes

OSTI as DE99000762

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  • 3. international topical meeting on neutron radiography, Lucerne (Switzerland), 16-19 Mar 1998

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  • Other: DE99000762
  • Report No.: LA-UR--98-2200
  • Report No.: CONF-980337--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 296784
  • Archival Resource Key: ark:/67531/metadc676221

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  • December 1, 1998

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 25, 2016, 1:02 p.m.

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King, N.S.P.; Adams, K. & Ables, E. An 800-MeV proton radiography facility for dynamic experiments, article, December 1, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc676221/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.