Thermal analysis, design, and testing of a rotating beam target for a compact D-D fast neutron generator

Heiko Kromer, Robert Adams, Benoit Soubelet, Robert Zboray, Horst Michael Prasser

    Research output: Contribution to journalArticle

    3 Scopus citations

    Abstract

    Compact Deuterium-Deuterium fast neutron generators are generally limited to a low neutron yield due to outgassing of implanted deuterium in case of ion beam target overheating. This is even more pronounced for a generator with a small emitting spot tailored to transmission-based imaging applications, resulting in long exposure times. In this work a novel water-cooled rotating copper target rod with a 5 µm thin titanium coating as a deuteron beam target was developed. Using extensive computational fluid dynamics and heat transfer analysis, an optimized target configuration was chosen. The details of the target rod design, construction and loading with deuterium are outlined. The first results after loading showed a peak total neutron output of 4.8 × 10 7 n/s for −107 kV target high voltage and 0.9 mA average target current at 220 rpm target rotational velocity. The comparison between actual and theoretical ideal neutron yield suggested that no loss of deuterium density in the target due to outgassing occurred.

    Original languageEnglish (US)
    Pages (from-to)47-54
    Number of pages8
    JournalApplied Radiation and Isotopes
    Volume145
    DOIs
    StatePublished - Mar 2019

    All Science Journal Classification (ASJC) codes

    • Radiation

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