Characterization, deployment, and in-flight performance of the BLAST-TNG cryogenic receiver
Characterization, deployment, and in-flight performance of the BLAST-TNG cryogenic receiver
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BLAST-TNG 低温接收器的表征、部署和飞行性能
DOI：
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发表时间：
2020
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通讯作者：
P. Williams
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作者：
I. Lowe;P. Ade;P. Ashton;J. Austermann;G. Coppi;E. Cox;M. Devlin;B. Dober;Valentina Fanfani;L. Fissel;N. Galitzki;Jiansong Gao;S. Gordon;C. Groppi;G. Hilton;J. Hubmayr;J. Klein;Dale Li;N. Lourie;H. Mani;P. Mauskopf;C. Mckenney;F. Nati;G. Novak;G. Pisano;J. Romualdez;J. Soler;A. Sinclair;C. Tucker;J. Ullom;M. Vissers;C. Wheeler;P. Williams
下一代气球载大口径亚毫米望远镜 (BLAST-TNG) 是一款亚毫米偏振计，设计用于在 24 天的南极飞行期间绘制 250、350 和 500 微米的星际尘埃和银河前景图。 BLAST-TNG 探测器阵列分别由 918、469 和 272 个 MKID 像素组成。像素由两个正交定向、交叉、线偏振敏感 MKID 天线形成。阵列被冷却至低于 300mK 的温度，并通过封闭循环 $^3$He 吸附制冷机与 $^4$He 真空罐相结合来稳定。探测器通过第二代可重配置开放架构计算硬件 (ROACH2) 和专为 BLAST-TNG 设计的定制射频电子设备的组合来读取。旨在读取和表征这些探测器的固件和软件是由 BLAST 团队围绕这些探测器从头开始构建的，并经过改编以供其他 MKID 仪器（例如 TolTEC 和 OLIMPO）使用。我们概述了这些系统以及地面表征和测量的飞行性能的深入方法。
The Next Generation Balloon-borne Large Aperture Submillimeter Telescope (BLAST-TNG) is a submillimeter polarimeter designed to map interstellar dust and galactic foregrounds at 250, 350, and 500 microns during a 24-day Antarctic flight. The BLAST-TNG detector arrays are comprised of 918, 469, and 272 MKID pixels, respectively. The pixels are formed from two orthogonally oriented, crossed, linear-polarization sensitive MKID antennae. The arrays are cooled to sub 300mK temperatures and stabilized via a closed cycle $^3$He sorption fridge in combination with a $^4$He vacuum pot. The detectors are read out through a combination of the second-generation Reconfigurable Open Architecture Computing Hardware (ROACH2) and custom RF electronics designed for BLAST-TNG. The firmware and software designed to readout and characterize these detectors was built from scratch by the BLAST team around these detectors, and has been adapted for use by other MKID instruments such as TolTEC and OLIMPO. We present an overview of these systems as well as in-depth methodology of the ground-based characterization and the measured in-flight performance.