AbstractTo investigate a feasibility for in situ X-ray imaging spectrometer JUXTA (Jupiter X-ray Telescope Array) onboard a Japanese Jupiter exploration mission, we demonstrated the ideal performances, i.e., angular resolution, effective area and grasp, of our original, conically-approximated Wolter type-I MEMS-processed optics, by extending the previous ray-tracing simulator. The novel simulator enables us to study both on- and off-axis responses for our optics with two-stage optical configurations for the first time. The on-axis angular resolution is restricted to 13μm corresponding to 10arcsec on the detector plane without considering the diffraction effect and dominated by the diffraction effect below 1keV (e.g., 13arcsec at 1keV). Si optics can achieve effective area of >700mm2 and grasp of >1600mm2deg2 at our interesting energy of 600eV. Larger effective area and grasp can be attained by employing Ni as a substrate material or Ir as a reflecting surface material. However, other factors produced in the fabrication processes such as the waviness on the mirror surface and the deformation error cause the significant performance degradation. Thus, we concluded that MEMS-processed optics can satisfy all the requirements of JUXTA only if the manufacturing accuracy can be controlled.


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    Titel :

    Ray-tracing simulations for the ultra-lightweight X-ray optics toward a future jupiter exploration mission


    Beteiligte:
    Mitsuishi, I. (Autor:in) / Ezoe, Y. (Autor:in) / Ogawa, T. (Autor:in) / Sato, M. (Autor:in) / Nakamura, K. (Autor:in) / Numazawa, M. (Autor:in) / Takeuchi, K. (Autor:in) / Ohashi, T. (Autor:in) / Ishikawa, K. (Autor:in) / Mitsuda, K. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 57 , 1 ; 320-328


    Erscheinungsdatum :

    2015-08-22


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Schlagwörter :