Development of the Next Generation of Multi-chroic Antenna-Coupled Transition Edge Sensor Detectors for CMB Polarimetry
Development of the Next Generation of Multi-chroic Antenna-Coupled Transition Edge Sensor Detectors for CMB Polarimetry
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开发用于 CMB 偏振测定的下一代多色天线耦合过渡边缘传感器探测器
DOI：
10.1007/s10909-016-1508-x
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发表时间：
2016
影响因子：
2
通讯作者：
W. Holzapfel
中科院分区：
文献类型：
--
作者：
B. Westbrook;A. Cukierman;Adrian T. Lee;A. Suzuki;C. Raum;W. Holzapfel
我们介绍了新一代多色正弦天线耦合跃迁边缘传感器(TES)测辐射热计的发展，该测辐射热计优化了宇宙微波背景(CMB)和宇宙前景的极化测量。这些设备采用偏振敏感的宽带自互补正弦天线来馈送片上频段定义滤波器，然后提供电力来加载耦合到释放的测辐射热计岛上的TES的电阻。这项技术最初是由加州大学伯克利分校开发的，将在未来一年半内由POLARBEAR-2和SPT-3G部署。此外，它还是2020年初将在卫星平台上进行全天空CMB和宇宙前景偏振观测的LiteBIRD任务的候选探测器。这项工作的重点是扩展该技术的带宽和每像素的波段数，以满足未来CMB任务的需要。这项工作表明，这些设备非常适合在20到380 GHz的范围内进行观测。本文描述了三种新像素类型的设计、制造和表征：以40、60和90 GHz为中心的低频三路复用像素(LFTP)，以220、280和350 GHz为中心的高频三路复用像素(HFTP)，以及以90、150、220和280 GHz为中心的中频四路复用像素(MFTP)。这些像素设计的平均分数带宽分别为36.7、34.5和31.4%。此外，我们发现每个波段的偏振调制效率在1%到3%之间，这与用于测量的线网的偏振效率是一致的。最后，我们发现对于每种像素类型，光束具有$$∼1%的椭圆度。测辐射热计的热特性是为了在我们的实验室中进行表征而调整的，因此我们不报告G和噪声值，因为它们不适合现代CMB实验。
We present the development of the next generation of multi-chroic sinuous antenna-coupled transition edge sensor (TES) bolometers optimized for precision measurements of polarization of the cosmic microwave background (CMB) and cosmic foreground. These devices employ a polarization sensitive broadband self-complementary sinuous antenna to feed on-chip band defining filters before delivering the power to load resistors coupled to a TES on a released bolometer island. This technology was originally developed by UC Berkeley and will be deployed by POLARBEAR-2 and SPT-3G in the next year and half. In addition, it is a candidate detector for the LiteBIRD mission which will make all sky CMB and cosmic foreground polarization observations from a satellite platform in the early 2020’s. This works focuses on expanding both the bandwidth and band count per pixel of this technology in order to meet the needs of future CMB missions. This work demonstrates that these devices are well suited for observations between 20 and 380 GHz. This proceeding describes the design, fabrication, and the characterization of three new pixel types: a low-frequency triplexing pixel (LFTP) with bands centered on 40, 60, and 90 GHz, a high-frequency triplexing pixel (HFTP) with bands centered on 220, 280, and 350 GHz, and a mid-frequency tetraplexing pixel with bands (MFTP) centered on 90, 150, 220, and 280 GHz. The average fractional bandwidth of these pixels designs was 36.7, 34.5, and 31.4 % respectively. In addition we found that the polarization modulation efficiency of each band was between 1 and 3 % which is consistent with the polarization efficiency of the wire grid used to take the measurement. Finally, we find that the beams have $${\sim }$$∼1 % ellipticity for each pixel type. The thermal properties of the bolometers where tuned for characterization in our lab so we do not report on G and noise values as they would be unsuitable for modern CMB experiments.