We are developing position-sensitive transition-edge sensor (TES) microcalorimeters (PoSTs) to detect gamma rays up to a few MeV. Each gamma-ray PoST consists of a long absorber with a TES on each end and works as a 1D imaging spectrometer. We fabricated PoSTs with 0.5 × 0.5 × 18.8 mm lead absorbers. We irradiated two PoST devices with gamma rays from a Cs-137 source. Gamma-ray pulses of the PoSTs show a strong correlation between the pulse height and the rise time. We divided the pulses in the 662 keV line into 12 groups after sorting them by rise time to determine effective pixels. We modeled the PoST device and compared the average pulses of the 12 effective pixels to numerical simulations. The actual pulses and simulated pulses were in good agreement.

中文翻译：

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伽马射线位置敏感过渡边缘传感器微量热仪的研制

我们正在开发位置敏感的过渡边缘传感器 (TES) 微量热计 (PoST)，以检测高达几 MeV 的伽马射线。每个伽马射线 PoST 由一个长吸收器组成，每端都有一个 TES，可用作一维成像光谱仪。我们制造了具有 0.5 × 0.5 × 18.8 mm 铅吸收器的 PoST。我们用来自 Cs-137 源的伽马射线照射了两个 PoST 设备。PoST 的伽马射线脉冲显示脉冲高度和上升时间之间有很强的相关性。我们将 662 keV 线中的脉冲按上升时间排序后分为 12 组以确定有效像素。我们对 PoST 设备进行了建模，并将 12 个有效像素的平均脉冲与数值模拟进行了比较。实际脉冲和模拟脉冲非常吻合。