Analytic model of ion emission from the focus of an intense relativistic electron beam on a target

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Advanced radiographic systems for stockpile stewardship require very small x-ray sources to achieve the required resolution. Focusing multi-kiloampere beams to diameters on the order of 1 mm onto a Bremsstrahlung target leads to the generation of axial electric fields on the order of several MV/cm which act to extract ions out of the surface plasma and accelerate them upstream into the beam. These backstreaming ions act as a distributed electrostatic lens which can perturb the focus of the electron beam in a time varying manner during the pulse. An analytic model of the ion extraction is presented for a particular ... continued below

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53 Kilobytes pages

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Caporaso, G. J. & Chen, Y. J. August 23, 1998.

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Advanced radiographic systems for stockpile stewardship require very small x-ray sources to achieve the required resolution. Focusing multi-kiloampere beams to diameters on the order of 1 mm onto a Bremsstrahlung target leads to the generation of axial electric fields on the order of several MV/cm which act to extract ions out of the surface plasma and accelerate them upstream into the beam. These backstreaming ions act as a distributed electrostatic lens which can perturb the focus of the electron beam in a time varying manner during the pulse. An analytic model of the ion extraction is presented for a particular target geometry along with scaling laws for the perturbation of the focal spot.

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53 Kilobytes pages

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  • 19th International Linear Accelerator Conference, Chicago, IL (US), 08/23/1998--08/28/1998

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  • Report No.: UCRL-JC-130594
  • Report No.: 39DP01000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 8418
  • Archival Resource Key: ark:/67531/metadc781005

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Office of Scientific & Technical Information Technical Reports

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  • August 23, 1998

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  • Dec. 3, 2015, 9:30 a.m.

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  • May 5, 2016, 9:02 p.m.

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Caporaso, G. J. & Chen, Y. J. Analytic model of ion emission from the focus of an intense relativistic electron beam on a target, article, August 23, 1998; California. (digital.library.unt.edu/ark:/67531/metadc781005/: accessed July 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.