High-intensity positron microprobe at Jefferson Lab

Golge, Serkan; Vlahovic, Branislav; Wojtsekhowski, Bogdan B.

doi:10.1063/1.4884781

Title: High-intensity positron microprobe at Jefferson Lab

Journal Article · Thu Jun 19 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4884781· OSTI ID:1134567

Golge, Serkan ^[1]; Vlahovic, Branislav ^[1]; Wojtsekhowski, Bogdan B. ^[2]

North Carolina Central Univ., Durham, NC (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

We present a conceptual design for a novel continuous wave electron-linac based high-intensity slow-positron production source with a projected intensity on the order of 10¹⁰ 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. The performance of the integrated beamline has been verified through computational studies. The computational results include Monte Carlo calculations of the optimized electron/positron beam energies, converter target thickness, synchronized raster system, transport of the beam from the converter target to the moderator, extraction of the beam from the channel, and moderation efficiency calculations. For the extraction of positrons from the magnetic channel a magnetic field terminator plug prototype has been built and experimental data on the effectiveness of this prototype are presented. The dissipation of the heat away from the converter target and radiation protection measures are also discussed.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Aeronautics and Space Administration (NASA); National Science Foundatation (NSF)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1134567

Report Number(s):: JLAB-PHY-14-1875; DOE/OR/23177-3056; arXiv:1404.1534; JAPIAU; NASA NNX09AV07A; NSF CREST HRD-0833184; TRN: US1500452

Journal Information:: Journal of Applied Physics, Vol. 115, Issue 23; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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