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首页> 外文会议>Optics for EUV, x-ray, and gamma-ray astronomy V >Angular resolution measurements at SPring-8 of a hard X-ray optic for the New Hard X-ray Mission
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Angular resolution measurements at SPring-8 of a hard X-ray optic for the New Hard X-ray Mission

机译：用于新的硬X射线任务的硬X射线光学元件在SPring-8处的角分辨率测量

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摘要

The realization of X-ray telescopes with imaging capabilities in the hard (> 10 keV) X-ray band requires the adoption of optics with shallow (< 0.25 deg) grazing angles to enhance the reflectivity of reflective coatings. On the other hand, to obtain large collecting area, large mirror diameters (< 350 mm) are necessary. This implies that mirrors with focal lengths >10 m shall be produced and tested. Full-illumination tests of such mirrors are usually performed with on-ground X-ray facilities, aimed at measuring their effective area and the angular resolution; however, they in general suffer from effects of the finite distance of the X-ray source, e.g. a loss of effective area for double reflection. These effects increase with the focal length of the mirror under test; hence a "partial" full-illumination measurement might not be fully representative of the in-flight performances. Indeed, a pencil beam test can be adopted to overcome this shortcoming, because a sector at a time is exposed to the X-ray flux, and the compensation of the beam divergence is achieved by tilting the optic. In this work we present the result of a hard X-ray test campaign performed at the BL20B2 beamline of the SPring-8 synchrotron radiation facility, aimed at characterizing the Point Spread Function (PSF) of a multilayer-coated Wolter-I mirror shell manufactured by Nickel electroforming. The mirror shell is a demonstrator for the NHXM hard X-ray imaging telescope (0.3 - 80 keV), with a predicted HEW (Half Energy Width) close to 20 arcsec. We show some reconstructed PSFs at monochromatic X-ray energies of 15 to 63 keV, and compare them with the PSFs computed from post-campaign metrology data, self-consistently treating profile and roughness data by means of a method based on the Fresnel diffraction theory. The modeling matches the measured PSFs accurately.
机译：要实现具有硬（> 10 keV）X射线带成像功能的X射线望远镜，就必须采用掠角浅（<0.25度）的光学器件，以增强反射涂层的反射率。另一方面，为了获得大的收集面积，需要大的反射镜直径（＜350mm）。这意味着必须生产和测试焦距大于10 m的反射镜。这种反射镜的全照明测试通常是在地面X射线设备上进行的，旨在测量其有效面积和角分辨率。然而，它们通常受到X射线源有限距离的影响，例如X射线源的距离。失去有效面积的双重反射。这些效果随着被测镜的焦距的增加而增加。因此，“部分”全照度测量可能无法完全代表飞行中的性能。实际上，可以采用笔形束测试来克服该缺点，因为一次扇区暴露在X射线通量中，并且通过倾斜光学器件可以实现光束发散的补偿。在这项工作中，我们展示了在SPring-8同步加速器辐射设施的BL20B2光束线上进行的硬X射线测试活动的结果，旨在表征制造的多层涂层Wolter-I镜壳的点扩展功能（PSF）通过镍电铸。镜壳是NHXM硬X射线成像望远镜（0.3-80 keV）的演示器，预测的HEW（半能量宽度）接近20弧秒。我们展示了在15到63 keV的单色X射线能量下的一些重构PSF，并将它们与从运动后计量数据计算出的PSF进行比较，并通过基于菲涅耳衍射理论的方法自洽地处理了轮廓和粗糙度数据。建模与测量的PSF精确匹配。

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  • 来源
    《Optics for EUV, x-ray, and gamma-ray astronomy V》|2011年|p.81470A.1-81470A.12|共12页
  • 会议地点 San Diego CA(US)
  • 作者

    D. Spiga; L. Raimondi; A. Fumzawa; S. Basso; R. Binda; G. Borghi; V. Cotroneo; G. Grisoni; H. Kunieda; F. Marioni; H. Matsumoto; H. Mori; T. Miyazawa; B. Negri; A. Orlandi; G. Pareschi; B. Salmaso; G. Tagliaferri; K. Uesugi; G. Valsecchi; D. Vemani;

  • 作者单位

    INAF/Brera Astronomical Observatory, Via E. Bianchi 46, 23807 Merate (LC), Italy;

    INAF/Brera Astronomical Observatory, Via E. Bianchi 46, 23807 Merate (LC), Italy,Universita' degli Studidell'Insubria, Via Valleggio 11, 21100 Como (CO), Italy;

    University ofNagoya, Furo-cho, Chikusa, Nagoya 464-8602, Japan;

    INAF/Brera Astronomical Observatory, Via E. Bianchi 46, 23807 Merate (LC), Italy;

    Media-Lario Technologies, Localita Pascolo, 23842 Bosisio Parini (LC), Italy;

    Media-Lario Technologies, Localita Pascolo, 23842 Bosisio Parini (LC), Italy;

    Center for Astrophysics, 60 Garden Street, Cambridge (MA) 02138-1516, United States;

    Media-Lario Technologies, Localita Pascolo, 23842 Bosisio Parini (LC), Italy;

    University ofNagoya, Furo-cho, Chikusa, Nagoya 464-8602, Japan;

    Media-Lario Technologies, Localita Pascolo, 23842 Bosisio Parini (LC), Italy;

    University ofNagoya, Furo-cho, Chikusa, Nagoya 464-8602, Japan;

    University ofNagoya, Furo-cho, Chikusa, Nagoya 464-8602, Japan;

    University ofNagoya, Furo-cho, Chikusa, Nagoya 464-8602, Japan;

    Agenzia Spaziale Italiana, Viale Liegi 26, 00198 Roma, Italy;

    Media-Lario Technologies, Localita Pascolo, 23842 Bosisio Parini (LC), Italy;

    INAF/Brera Astronomical Observatory, Via E. Bianchi 46, 23807 Merate (LC), Italy;

    INAF/Brera Astronomical Observatory, Via E. Bianchi 46, 23807 Merate (LC), Italy;

    INAF/Brera Astronomical Observatory, Via E. Bianchi 46, 23807 Merate (LC), Italy;

    Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan;

    Media-Lario Technologies, Localita Pascolo, 23842 Bosisio Parini (LC), Italy;

    Media-Lario Technologies, Localita Pascolo, 23842 Bosisio Parini (LC), Italy;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空仪表、航空设备;X射线、紫外线、红外线;
  • 关键词

    hard X-ray optics; NHXM; SPring-8; optics calibration;

    机译：硬X射线光学器件； NHXM； SPring-8;光学校准;

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