Calibration measurements on the DEPFET Detectors for the MIXS instrument on BepiColombo
Calibration measurements on the DEPFET Detectors for the MIXS instrument on BepiColombo
复制标题
BepiColombo 上 MIXS 仪器的 DEPFET 探测器的校准测量
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
J. Treis
中科院分区：
文献类型：
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作者：
P. Majewski;F. Aschauer;S. Aschauer;A. Bähr;B. Bergbauer;M. Hilchenbach;M. Krumrey;C. Laubis;T. Lauf;P. Lechner;G. Lutz;F. Scholze;H. Soltau;A. Stefanescu;L. Strüder;J. Treis
水星成像X射线光谱仪将随欧空局第5次基石使命BepiColombo发射。双通道仪器MIXS致力于通过元素荧光线的X射线光谱成像来探索汞表面的元素组成。混合型X射线散射仪的主要科学目标之一是提供关键造岩元素的空间分辨元素丰度图。MIXS将是XRS仪器的后继者，XRS仪器目前正在美国宇航局的信使号卫星上绕水星轨道运行。由于其创新的探测器和光学概念，MIXS将提供前所未有的光谱和空间分辨率。MIXS的目标能带范围从0.5到7 keV，并允许直接访问0.7 keV的Fe-L线，这是以前的任务无法访问的。此外，在水星轨道上运行一年后，在1 keV的参考能量下，FWHM ≤ 200 eV的高光谱分辨率允许分离重要元素如Mg（1.25 keV）和Al（1.49 keV）的X射线荧光发射线，而不需要任何滤波器。用于两个通道的X射线的能量和空间分辨检测的检测器是相同的DEPFET（耗尽P沟道FET）有源像素检测器。我们报告了BESSY II同步加速器辐射设施PTB（Physikalisch-Technische Bundesanstalt）光束线上MIXS飞行和飞行备用探测器模块的校准情况。每个检测器至少在0.5至10 keV的能量范围内的10个离散能量下进行校准。所有三个检测器模块的优异光谱性能得到了验证。
The Mercury Imaging X-ray Spectrometer (MIXS) will be launched on board of the 5th ESA cornerstone mission BepiColombo. The two channel instrument MIXS is dedicated to the exploration of the elemental composition of the mercurian surface by imaging x-ray spectroscopy of the elemental fluorescence lines. One of the main scientific goals of MIXS is to provide spatially resolved elemental abundance maps of key rock-forming elements. MIXS will be the successor of the XRS instrument, which is currently orbiting Mercury on board of NASAs satellite MESSENGER. MIXS will provide unprecedented spectral and spatial resolution due to its innovative detector and optics concepts. The MIXS target energy band ranges from 0.5 to 7 keV and allows to directly access the Fe-L line at 0.7 keV, which was not accessible to previous missions. In addition, the high spectroscopic resolution of FWHM ≤ 200 eV at the reference energy of 1 keV after one year in Mercury orbit, allows to separate the x-ray fluorescence emission lines of important elements like Mg (1.25 keV) and Al (1.49 keV) without the need for any filter. The detectors for the energy and spatially resolved detection of x-rays for both channels are identical DEPFET (DEpleted P-channel FET) active pixel detectors. We report on the calibration of the MIXS flight and flight spare detector modules at the PTB (Physikalisch-Technische Bundesanstalt) beamlines at the BESSY II synchrotron radiation facility. Each detector was calibrated at least at 10 discrete energies in the energy range from 0.5 to 10 keV. The excellent spectroscopic performance of all three detector modules was verified.