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arXiv 1808.00623physics.ins-det
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TES X射线微量热计的高线性度刻度

A Highly Linear Calibration Metric for TES X-ray Microcalorimeters

C. G. Pappas, J. W. Fowler, D. A. Bennett, W. B. Doriese, Y. I. Joe, K. M. Morgan, G. C. O'Neil, J. N. Ullom, D. S. Swetz

发表信息：
Pappas, C.G., Fowler, J.W., Bennett, D.A. et al. J Low Temp Phys (2018)
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摘要：

过渡边缘传感器X射线微量热计通常是凭经验校准的，因为最广泛使用的校准度量，最佳滤波脉冲高度（OFPH），通常对光子能量$E_γ$具有未知的依赖性。因为校准函数只能在可以产生已知能量的光子的特定点处测量，所以OFPH对$E_γ$的这种未知依赖性导致校准误差和对时间密集的校准测量和分析的需要。作为$E_γ$的函数接近线性的校准度量可以帮助缓解这些问题。在这项工作中，我们评估的线性的物理动机的校准度量，$E_{Joule}$。我们测量校准脉冲的范围为4.5千电子伏$<$ $E_γ$ $<$ 9.6千电子伏的探测器优化为6千电子伏的光子比较的线性特性的$E_{Joule}$ OFPH。在这些测试数据集中，我们发现$E_{Joule}$拟合线性函数的数量级优于OFPH。此外，使用$E_{J}$（$E_{Joule}$的优化版本）的校准函数在数据的2-3 eV噪声内是线性的。

英文摘要：

Transition-edge sensor X-ray microcalorimeters are usually calibrated empirically, as the most widely-used calibration metric, optimal filtered pulse height (OFPH), in general has an unknown dependance on photon energy, $E_γ$. Because the calibration function can only be measured at specific points where photons of a known energy can be produced, this unknown dependence of OFPH on $E_γ$ leads to calibration errors and the need for time-intensive calibration measurements and analysis. A calibration metric that is nearly linear as a function of $E_γ$ could help alleviate these problems. In this work, we assess the linearity of a physically motivated calibration metric, $E_{Joule}$. We measure calibration pulses in the range 4.5 keV$<$$E_γ$$<$9.6 keV with detectors optimized for 6 keV photons to compare the linearity properties of $E_{Joule}$ to OFPH. In these test data sets, we find that $E_{Joule}$ fits a linear function an order of magnitude better than OFPH. Furthermore, calibration functions using $E_{J}$, an optimized version of $E_{Joule}$, are linear within the 2-3 eV noise of the data.

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