Characterization and Performance of a Kilo-TES Sub-Array for ACTPol
Characterization and Performance of a Kilo-TES Sub-Array for ACTPol
复制标题
ACTPol Kilo-TES 子阵列的表征和性能
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Edward J. Wollack
中科院分区：
文献类型：
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作者：
E. Grace;J. Beall;H.;M. Devlin;A. Fox;G. Hilton;J. Hubmayr;K. Irwin;J. Klein;Dale Li;M. Lungu;L. Newburgh;J. Nibarger;M. Niemack;J. McMahon;L. Page;C. Pappas;B. Schmitt;S. Staggs;J. Lanen;Edward J. Wollack
ACTPol是阿塔卡马宇宙学望远镜(ACT)的偏振敏感接收器，它将对宇宙微波背景的小尺度偏振各向异性进行毫米波长测量，以研究早期宇宙中的膨胀、暗能量、暗物质和中微子的性质。ACTPol将使用三个过渡边缘传感器(TES)测辐射热计探测器阵列。探测器的目标转变温度为150 MK，将在稀释冰箱提供的约100 MK的浴温下运行。一个中心频率为150 GHz、由1024个TE组成的阵列于2013年7月在ACT现场实现了第一次亮相。我们预计在2013年观测季节结束时部署焦平面的其余部分，包括第二个150 GHz阵列和对90 GHz和150 GHz敏感的多色阵列。在这些过程中，我们介绍了在实验室和初始现场测试期间对第一个阵列进行的测量结果的关键探测器参数的表征。我们评论了探测器转变温度、饱和功率和热导率的设计目标、测量方法和均匀性，并详细介绍了探测器光学效率和时间常数的测量方法和结果。
ACTPol is a polarization-sensitive receiver upgrade to the Atacama Cosmology Telescope (ACT) which will make millimeter wavelength measurements of the small-scale polarization anisotropies of the cosmic microwave background to investigate the properties of inflation, dark energy, dark matter, and neutrinos in the early Universe. ACTPol will employ three arrays of transition edge sensor (TES) bolometer detectors. The detectors, with a target transition temperature of 150 mK, will be operated at a bath temperature of 100 mK provided by a dilution refrigerator. One array operating at a central frequency of 150 GHz and consisting of 1024 TESes achieved first light at the ACT site in July 2013. We anticipate fielding the remainder of the focal plane, consisting of a second 150 GHz array and a multi-chroic array sensitive to 90 and 150 GHz, at the end of the 2013 observing season. In these proceedings, we present characterization of key detector parameters from measurements performed on the first array both in the lab and during initial field testing. We comment on the design goals, measurements, and uniformity of the detector transition temperatures, saturation powers, and thermal conductivities while detailing measurement methods and results for the detector optical efficiencies and time constants.