The Line Emission Mapper (LEM) is a proposed x-ray probe mission to study the physics of galaxy formation through spectral and spatial measurements of x-rays in the energy band of 0.2 to 2 keV. The LEM Microcalorimeter Spectrometer instrument on LEM will have a hybrid transition-edge sensor (TES) microcalorimeter array made up of an inner array of single-pixels with one x-ray absorber connected to one TES and an outer array of multi-absorber microcalorimeters, or “hydras,” with four absorbers connected to a single TES, each with a different thermal conductance. Here, we characterize the first hybrid array of single-pixel and multi-absorber microcalorimeters designed for LEM. We present the fundamental transition, noise, and detector performance properties to demonstrate their suitability for the mission. We also show that the spectral resolution at the Al Kα line is 1.92 ± 0.02 eV for the 4-pixel hydra (coadded) and 0.90 ± 0.02 eV for the single-pixels. This is significantly better resolution than the LEM mission level requirement. Finally, we demonstrate that the position discrimination between the four pixels of the hydra can be achieved down to 200 eV when measured with a time-division multiplexed readout using timings representative of the anticipated LEM requirements.

中文翻译：

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用于线发射测绘仪的单吸收体和多吸收体过渡边缘传感器微量热计混合阵列的表征

线发射测绘仪 (LEM) 是一项拟议的 X 射线探测任务，旨在通过 0.2 至 2 keV 能带内 X 射线的光谱和空间测量来研究星系形成的物理现象。LEM 上的 LEM 微量热计光谱仪将具有混合过渡边缘传感器 (TES) 微量热计阵列，该阵列由单像素内部阵列（其中一个 X 射线吸收器连接到一个 TES）和多吸收器微量热计外部阵列组成，或“Hydras”，四个吸收器连接到一个 TES，每个吸收器具有不同的热导率。在这里，我们描述了第一个专为 LEM 设计的单像素和多吸收体微量热计混合阵列。我们提出了基本的转变、噪声和探测器性能特性，以证明它们对任务的适用性。我们还表明，4 像素水螅（共添加）的 Al Kα 线的光谱分辨率为 1.92 ± 0.02 eV，单像素的光谱分辨率为 0.90 ± 0.02 eV。这比 LEM 任务级别要求的分辨率要好得多。最后，我们证明，当使用代表预期 LEM 要求的时序进行时分复用读数测量时，九头蛇的四个像素之间的位置辨别可以实现低至 200 eV。