Superfluid Liquid Helium Control for the Primordial Inflation Polarization Explorer Balloon Payload
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2021
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| _version_ | 1866911922809470976 |
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| author | Kogut, A. Essinger-Hileman, T. Fixsen, D. Lowe, L. Mirel, P. Switzer, E. Wollack, E. |
| author_facet | Kogut, A. Essinger-Hileman, T. Fixsen, D. Lowe, L. Mirel, P. Switzer, E. Wollack, E. |
| contents | The Primordial Inflation Polarization Explorer (PIPER) is a stratospheric balloon payload to measure polarization of the cosmic microwave background. Twin telescopes mounted within an open-aperture bucket dewar couple the sky to bolometric detector arrays. We reduce detector loading and photon noise by cooling the entire optical chain to 1.7 K or colder. A set of fountain-effect pumps sprays superfluid liquid helium onto each optical surface, producing helium flows of 50--100 cm^3 / s at heights up to 200 cm above the liquid level. We describe the fountain-effect pumps and the cryogenic performance of the PIPER payload during two flights in 2017 and 2019. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2105_08734 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Superfluid Liquid Helium Control for the Primordial Inflation Polarization Explorer Balloon Payload Kogut, A. Essinger-Hileman, T. Fixsen, D. Lowe, L. Mirel, P. Switzer, E. Wollack, E. Instrumentation and Methods for Astrophysics The Primordial Inflation Polarization Explorer (PIPER) is a stratospheric balloon payload to measure polarization of the cosmic microwave background. Twin telescopes mounted within an open-aperture bucket dewar couple the sky to bolometric detector arrays. We reduce detector loading and photon noise by cooling the entire optical chain to 1.7 K or colder. A set of fountain-effect pumps sprays superfluid liquid helium onto each optical surface, producing helium flows of 50--100 cm^3 / s at heights up to 200 cm above the liquid level. We describe the fountain-effect pumps and the cryogenic performance of the PIPER payload during two flights in 2017 and 2019. |
| title | Superfluid Liquid Helium Control for the Primordial Inflation Polarization Explorer Balloon Payload |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2105.08734 |