Bueno J, Murugesan V, Karatsu K, Thoen D J, Baselmans J J A
1SRON Netherlands Institute for Space Research, Utrecht, The Netherlands.
2Terahertz Sensing Group, Delft University of Technology, Delft, The Netherlands.
J Low Temp Phys. 2018;193(3):96-102. doi: 10.1007/s10909-018-1962-8. Epub 2018 May 29.
We present the development of a background-limited kilo-pixel imaging array of ultrawide bandwidth kinetic inductance detectors (KIDs) suitable for space-based THz astronomy applications. The array consists of 989 KIDs, in which the radiation is coupled to each KID via a leaky lens antenna, covering the frequency range between 1.4 and 2.8 THz. The single pixel performance is fully characterised using a representative small array in terms of sensitivity, optical efficiency, beam pattern and frequency response, matching very well its expected performance. The kilo-pixel array is characterised electrically, finding a yield larger than 90% and an averaged noise-equivalent power lower than 3 10 W/Hz . The interaction between the kilo-pixel array and cosmic rays is studied, with an expected dead time lower than 0.6% when operated in an L2 or a similar far-Earth orbit.
我们展示了一种适用于天基太赫兹天文学应用的背景受限的超宽带动电感探测器（KID）千像素成像阵列的研发情况。该阵列由989个KID组成，其中辐射通过漏波透镜天线耦合到每个KID，覆盖1.4至2.8太赫兹的频率范围。使用一个具有代表性的小阵列，从灵敏度、光学效率、波束方向图和频率响应等方面对单像素性能进行了全面表征，其性能与预期非常匹配。对该千像素阵列进行了电学表征，发现良品率大于90%，平均噪声等效功率低于3×10⁻¹⁷W/Hz。研究了千像素阵列与宇宙射线之间的相互作用，预计在L2或类似的远地轨道运行时，死时间低于0.6%。
