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首页> 外文期刊>Journal of Applied Physics >High-intensity positron microprobe at the Thomas Jefferson National Accelerator Facility
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High-intensity positron microprobe at the Thomas Jefferson National Accelerator Facility

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摘要

We present a conceptual design for a novel continuous wave electron-linac based high-intensity high-brightness slow-positron production source with a projected intensity on the order of 10~(10) e~+/s. Reaching this intensity in our design relies on the transport of positrons (T_+ below 600 keV) from the electron-positron pair production converter target to a low-radiation and low-temperature area for moderation in a high-efficiency cryogenic rare gas moderator, solid Ne. This design progressed through Monte Carlo optimizations of: electron/positron beam energies and converter target thickness, transport of the e~+ beam from the converter to the moderator, extraction of the e~+ beam from the magnetic channel, a synchronized raster system, and moderator efficiency calculations. For the extraction of e~+ from the magnetic channel, a magnetic field terminator plug prototype has been built and experimental results on the effectiveness of the prototype are presented. The dissipation of the heat away from the converter target and radiation protection measures are also discussed.

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  • 来源
    《Journal of Applied Physics》 |2014年第23期|234907-1-234907-10|共10页
  • 作者

    S. Golge; B. Vlahovic; B. Wojtsekhowski;

  • 作者单位

    North Carolina Central University, Durham, North Carolina 27707, USA;

    Jefferson Laboratory, 12000 Jefferson Ave., Newport News, Virginia 23606, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类 应用物理学;
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