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arXiv 2403.16620astro-ph.IM
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POLARBEAR-2A CMB偏振实验中使用热源对探测器时间常数的标定

Calibration of detector time constant with a thermal source for the POLARBEAR-2A CMB polarization experiment

S. Takatori, M. Hasegawa, M. Hazumi, D. Kaneko, N. Katayama, A. T. Lee, S. Takakura, T. Tomaru, T. Adkins, D. Barron, Y. Chinone, K. T. Crowley, T. de Haan, T. … 展开作者

S. Takatori, M. Hasegawa, M. Hazumi, D. Kaneko, N. Katayama, A. T. Lee, S. Takakura, T. Tomaru, T. Adkins, D. Barron, Y. Chinone, K. T. Crowley, T. de Haan, T. Elleflot, N. Farias, C. Feng, T. Fujino, J. C. Groh, H. Hirose, F. Matsuda, H. Nishino, Y. Segawa, P. Siritanasak, A. Suzuki, K. Yamada

AI总结:

针对POLARBEAR-2A实验中探测器时间常数不确定性导致偏振角偏差的问题,本文设计了一套热源标定系统,用于在亚毫秒级别标定bolometer时间常数,并给出初步标定结果。

摘要:

Simons Array(SA)项目是一个地面宇宙微波背景(CMB)偏振实验。SA使用三台望远镜进行天空观测,POLARBEAR-2A(PB-2A)是第一台望远镜上的接收机系统。对于地面实验而言,大气涨落是可能导致偏振泄漏的主要噪声源。在PB-2A接收机系统中,使用连续旋转的半波片(HWP)来抑制偏振泄漏。然而,由于偏振信号的快速调制,探测器时间常数的不确定性会导致偏振角的不确定性。对于PB-2A,每个bolometer的时间常数需要在亚毫秒级别进行标定,以避免给偏振信号引入偏差。我们开发了一套新的标定器系统,可用于标定探测器的时间常数。在本研究中,我们介绍了该标定系统的设计以及PB-2A时间常数标定的初步结果。

英文摘要:

The Simons Array (SA) project is a ground-based Cosmic Microwave Background (CMB) polarization experiment. The SA observes the sky using three telescopes, and POLARBEAR-2A (PB-2A) is the receiver system on the first telescope. For the ground-based experiment, atmospheric fluctuation is the primary noise source that could cause polarization leakage. In the PB-2A receiver system, a continuously rotating half-wave plate (HWP) is used to mitigate the polarization leakage. However, due to the rapid modulation of the polarization signal, the uncertainty in the time constant of the detector results in an uncertainty in the polarization angle. For PB-2A, the time constant of each bolometer needs to be calibrated at the sub-millisecond level to avoid introducing bias to the polarization signal. We have developed a new calibrator system that can be used to calibrate the time constants of the detectors. In this study, we present the design of the calibration system and the preliminary results of the time constant calibration for PB-2A.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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