A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator

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We present recent work on the development of a microwave ion source that will be used in a high-yield compact neutron generator for active interrogation applications. The sealed tube generator will be capable of producing high neutron yields, 5x1011 n/s for D-T and ~;;1x1010 n/s for D-D reactions, while remaining transportable. We constructed a microwave ion source (2.45 GHz) with permanent magnets to provide the magnetic field strength of 87.5 mT necessary for satisfying the electron cyclotron resonance (ECR) condition. Microwave ion sources can produce high extracted beam currents at the low gas pressures required for sealed tube operation and … continued below

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Waldmann, Ole & Ludewigt, Bernhard October 11, 2010.

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We present recent work on the development of a microwave ion source that will be used in a high-yield compact neutron generator for active interrogation applications. The sealed tube generator will be capable of producing high neutron yields, 5x1011 n/s for D-T and ~;;1x1010 n/s for D-D reactions, while remaining transportable. We constructed a microwave ion source (2.45 GHz) with permanent magnets to provide the magnetic field strength of 87.5 mT necessary for satisfying the electron cyclotron resonance (ECR) condition. Microwave ion sources can produce high extracted beam currents at the low gas pressures required for sealed tube operation and at lower power levels than previously used RF-driven ion sources. A 100 mA deuterium/tritium beam will be extracted through a large slit (60x6 mm2) to spread the beam power over a larger target area. This paper describes the design of the permanent-magnet microwave ion source and discusses the impact of the magnetic field design on the source performance. The required equivalent proton beam current density of 40 mA/cm2 was extracted at a moderate microwave power of 400 W with an optimized magnetic field.

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  • CAARI 2010 21st International Conference on the Application of Accelerators in Research and Industry, Fort Worth, Tx, 08/08/10-08/13/10

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  • Report No.: LBNL-4665E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1023399
  • Archival Resource Key: ark:/67531/metadc829195

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  • October 11, 2010

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  • May 19, 2016, 3:16 p.m.

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  • Oct. 4, 2017, 3:29 p.m.

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Waldmann, Ole & Ludewigt, Bernhard. A Permanent-Magnet Microwave Ion Source for a Compact High-Yield Neutron Generator, article, October 11, 2010; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc829195/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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