Modeling the use of Self-Focused Beams to Overcome the Effects of Target Emissions in Advanced Hydrodynamic Radiography Machines

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In the machines being developed for advanced hydrodynamic radiography, an electron beam of several kA current and 20 Mev particle energy is focused to less than a millimeter diameter onto a high atomic number target to produce bremstrahlung X-rays. Several pulses occur during a period of about 2 {micro}s. A plasma plume is predicted to move upstream from the target . If the final focus onto the target is in vacuum, then the plasma from an early pulse may neutralize the self-electric field of a later pulse causing over-focusing (1). Also positive ions may be accelerated upstream by the self-electric … continued below

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Lauer, E May 1, 2001.

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In the machines being developed for advanced hydrodynamic radiography, an electron beam of several kA current and 20 Mev particle energy is focused to less than a millimeter diameter onto a high atomic number target to produce bremstrahlung X-rays. Several pulses occur during a period of about 2 {micro}s. A plasma plume is predicted to move upstream from the target . If the final focus onto the target is in vacuum, then the plasma from an early pulse may neutralize the self-electric field of a later pulse causing over-focusing (1). Also positive ions may be accelerated upstream by the self-electric field of a beam focused onto a conducting target in vacuum (1,2). The ions neutralize part of the self-electric field and so cause a time varying change of focusing.

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PDF-FILE: 16 ; SIZE: 0.6 MBYTES pages

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  • Other Information: PBD: 1 May 2001

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  • May 1, 2001

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Lauer, E. Modeling the use of Self-Focused Beams to Overcome the Effects of Target Emissions in Advanced Hydrodynamic Radiography Machines, report, May 1, 2001; California. (https://digital.library.unt.edu/ark:/67531/metadc1406347/: accessed June 9, 2023), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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