High-spectral resolution high-cadence imaging x-ray microcalorimeters for solar physics
High-spectral resolution high-cadence imaging x-ray microcalorimeters for solar physics
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用于太阳物理的高光谱分辨率高频率成像 X 射线微热量计
DOI：
10.1117/12.857783
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Randall K. Smith
中科院分区：
文献类型：
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作者：
S. Bandler;C. Bailey;J. Bookbinder;E. DeLuca;J. Chervenak;M. Eckart;F. Finkbeiner;Daniel Kelley;R. Kelley;C. Kilbourne;F. Porter;J. Sadleir;S. Smith;Randall K. Smith
高光谱分辨率，高节奏，成像X射线光谱学有可能彻底改变日冕的研究。为此，我们一直在开发过渡边缘传感器（TES）为基础的X射线微量热计阵列，为未来的太阳物理任务，成像和高能量分辨率光谱将使以前不可能的研究动态和能量的日冕。这些X射线微量热计的特性与为天体物理学开发的传统微量热计显著不同，因为它们需要适应更高的计数率（300-1000 cps），同时在0.2-10 keV的X射线能带中保持小于4 eV FWHM的高能量分辨率。另一个主要区别是像素尺寸（小于75 × 75平方微米）比X射线微量热仪的典型尺寸小，以便提供小于1角秒的角分辨率。我们已经在具有12 × 12平方微米TES传感器和34 × 34 × 9.1微米金吸收体的像素中实现了在6 keV下2.15 eV的能量分辨率，并且在具有35 × 35微米TES和57 × 57 × 9.1微米金吸收体的像素中实现了在6 keV下2.30 eV的分辨率。这种性能已经在直接制造到固体基板上的像素中实现，即。它们不由氮化硅膜支撑。我们目前的结果，从这些探测器，预期的性能在高计数率，并为未来的太阳能任务使用这种技术的前景。
High spectral resolution, high cadence, imaging x-ray spectroscopy has the potential to revolutionize the study of the solar corona. To that end we have been developing transition-edge-sensor (TES) based x-ray microcalorimeter arrays for future solar physics missions where imaging and high energy resolution spectroscopy will enable previously impossible studies of the dynamics and energetics of the solar corona. The characteristics of these xray microcalorimeters are significantly different from conventional microcalorimeters developed for astrophysics because they need to accommodate much higher count rates (300-1000 cps) while maintaining high energy resolution of less than 4 eV FWHM in the X-ray energy band of 0.2-10 keV. The other main difference is a smaller pixel size (less than 75 x 75 square microns) than is typical for x-ray microcalorimeters in order to provide angular resolution less than 1 arcsecond. We have achieved at energy resolution of 2.15 eV at 6 keV in a pixel with a 12 x 12 square micron TES sensor and 34 x 34 x 9.1 micron gold absorber, and a resolution of 2.30 eV at 6 keV in a pixel with a 35 x 35 micron TES and a 57 x 57 x 9.1 micron gold absorber. This performance has been achieved in pixels that are fabricated directly onto solid substrates, ie. they are not supported by silicon nitride membranes. We present the results from these detectors, the expected performance at high count-rates, and prospects for the use of this technology for future Solar missions.