| Autor: |
H. Enokida, Masashi Hazumi, Junji Yumoto, Doa Ahmad, T. Toda, K. Komatsu, Charles Hill, Hiroaki Imada, Yutaka Terao, Hiroyuki Ohsaki, Yosuke Iwata, Haruyuki Sakurai, Tomotake Matsumura, Hajime Sugai, Hirokazu Ishino, Nobuhiko Katayama, Kuniaki Konishi, Makoto Kuwata-Gonokami, Akito Kusaka, Yuki Sakurai, Yusuke Ishida, Shinya Sugiyama, T. Iida, Yoshiki Nomura, Ryota Takaku, T. Ghigna |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. |
| Popis: |
We present a breadboard model development status of the polarization modulator unit (PMU) for a low-frequency telescope (LFT) of the LiteBIRD space mission. LiteBIRD is a next-generation cosmic microwave background polarization satellite to measure the primordial B-mode with the science goal of σr < 0.001. The baseline design of LiteBIRD consists of reflective low-frequency and refractive medium-and-high-frequency telescopes. Each telescope employs the PMU based on a continuous rotating half-wave plate (HWP) at the aperture. The PMU is a critical instrument for the LiteBIRD to achieve the science goal because it significantly suppresses 1/f noise and mitigates systematic uncertainties. The LiteBIRD LFT PMU consists of a broadband achromatic HWP and a cryogenic rotation mechanism. In this presentation, we discuss requirements, design and systematic studies of the PMU, and we report the development status of the broadband HWP and the space-compatible cryogenic rotation mechanism. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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