Improved pyroelectric x-ray generator for planetary active x-ray spectroscopy

Masayuki Naito*, Nobuyuki Hasebe, Hiroshi Nagaoka, Yusuke Oshima, Miho Mizone, Eido Shibamura, Haruyoshi Kuno, Kyeong J. Kim, José A. Matias-Lopes, Jesús Martínez-Frías

*この研究の対応する著者

    研究成果: Conference contribution

    1 被引用数 (Scopus)

    抄録

    The elemental composition on planetary surface provides us an essential information to improve geological and geochemical understanding of planets. An active X-ray spectrometer (AXS) was developed and proposed as one of the mission payloads to perform in-situ X-ray fluorescence analysis. The AXS consists of multiple pyroelectric X-ray generators (PXGs) and a silicon drift detector (SDD). Although the PXG is light in weight and low in electric consumption, the limited X-ray intensity and reproducibility hamper obtaining the elemental composition by short time observation. This is attributed mainly to the less known mechanism of X-ray and electron emission by the pyroelectric crystal. In this study, we observed the crystal surface during X-ray emission as a function of the distance between the crystal top and a Cu target. Two types of light emission derived from the electric discharge were observed. The dependence of light emission on the distance was found to be related with the physical mechanism of pyroelectric X-ray emission. The study provides clues to obtain high intensity and reproducible X-rays emission. The experimental results and discussion are presented in this paper.

    本文言語English
    ホスト出版物のタイトルHard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX
    出版社SPIE
    10392
    ISBN(電子版)9781510612419
    DOI
    出版ステータスPublished - 2017 1月 1
    イベントHard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX 2017 - San Diego, United States
    継続期間: 2017 8月 72017 8月 9

    Other

    OtherHard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX 2017
    国/地域United States
    CitySan Diego
    Period17/8/717/8/9

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 凝縮系物理学
    • コンピュータ サイエンスの応用
    • 応用数学
    • 電子工学および電気工学

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