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arXiv 1402.3601astro-ph.IM
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毫米波动态电感探测器和过渡边缘传感器的基波噪声比较

A Comparison of Fundamental Noise in Kinetic Inductance Detectors and Transition Edge Sensors for Millimeter-wave Applications

A. E. Lowitz, E. M. Barrentine, S. R. Golwala, P. T. Timbie

摘要:

动力学电感探测器(KIDS)显示出作为在宽波长范围内进行天文观测的有竞争力的技术的前景。我们感兴趣的是比较的基本限制的灵敏度KIDS与过渡边缘传感器(TES)在毫米波长,特别是在所需的研究的宇宙微波背景(CMB)的波长。我们计算的总基本噪声所产生的各种浴温度和光负载的情况下,在毫米波长的应用程序中的TES和KID的光和热激发。特别考虑的情况下,地面观测的100千兆赫辐射与100 mK浴温度,条件符合计划的第二个模块的QUBIC望远镜,CMB仪器。在这些条件下,与典型的优化TES相比,具有优化的临界温度的氮化钛KID付出了几个百分比的噪声损失。

英文摘要:

Kinetic inductance detectors (KIDs) show promise as a competitive technology for astronomical observations over a wide range of wavelengths. We are interested in comparing the fundamental limitations to the sensitivity of KIDs with that of transition edge sensors (TESs) at millimeter wavelengths, specifically over the wavelengths required for studies of the Cosmic Microwave Background (CMB). We calculate the total fundamental noise arising from optical and thermal excitations in TESs and KIDs for a variety of bath temperatures and optical loading scenarios for applications at millimeter wavelengths. Special consideration is given to the case of ground-based observations of 100 GHz radiation with a 100 mK bath temperature, conditions consistent with the planned second module of the QUBIC telescope, a CMB instrument. Under these conditions, a titanium nitride KID with optimized critical temperature pays a few percent noise penalty compared to a typical optimized TES.

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