| Autor: |
Matsuda, Frederick, Lowry, Lindsay, Suzuki, Aritoki, Faundez, Mario Aguilar, Arnold, Kam, Barron, Darcy, Bianchini, Federico, Cheung, Kolen, Chinone, Yuji, Elleflot, Tucker, Fabbian, Giulio, Goeckner-Wald, Neil, Hasegawa, Masaya, Kaneko, Daisuke, Katayama, Nobuhiko, Keating, Brian, Lee, Adrian, Navaroli, Martin, Nishino, Haruki, Paar, Hans, Puglisi, Giuseppe, Richards, Paul, Seibert, Joseph, Siritanasak, Praween, Tajima, Osamu, Takatori, Sayuri, Tsai, Calvin, Westbrook, Ben |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Review of Scientific Instruments 90, 115115 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1063/1.5095160 |
| Popis: |
We describe the Fourier Transform Spectrometer (FTS) used for in-field testing of the POLARBEAR receiver, an experiment located in the Atacama Desert of Chile which measures the cosmic microwave background (CMB) polarization. The POLARBEAR-FTS (PB-FTS) is a Martin-Puplett interferometer designed to couple to the Huan Tran Telescope (HTT) on which the POLARBEAR receiver is installed. The PB-FTS measured the spectral response of the POLARBEAR receiver with signal-to-noise ratio (SNR) $>20$ for $\sim$69% of the focal plane detectors due to three features: a high throughput of 15.1 steradian cm$^{2}$, optimized optical coupling to the POLARBEAR optics using a custom designed output parabolic mirror, and a continuously modulated output polarizer. The PB-FTS parabolic mirror is designed to mimic the shape of the 2.5 m-diameter HTT primary reflector which allows for optimum optical coupling to the POLARBEAR receiver, reducing aberrations and systematics. One polarizing grid is placed at the output of the PB-FTS, and modulated via continuous rotation. This modulation allows for decomposition of the signal into different harmonics that can be used to probe potentially pernicious sources of systematic error in a polarization-sensitive instrument. The high throughput and continuous output polarizer modulation features are unique compared to other FTS calibrators used in the CMB field. In-field characterization of the POLARBEAR receiver was accomplished using the PB-FTS in April 2014. We discuss the design, construction, and operation of the PB-FTS and present the spectral characterization of the POLARBEAR receiver. We introduce future applications for the PB-FTS in the next-generation CMB experiment, the Simons Array. |
| Databáze: |
arXiv |
| Externí odkaz: |
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