Design of corrugated-horn-coupled MKID focal plane for CMB B-mode polarization

Yutaro Sekimoto; Shigeyuki Sekiguchi; Shibo Shu; Masakazu Sekine; Tom Nitta; Masato Naruse; Agnes Dominjon; Takashi Hasebe; Wenlei Shan; Takashi Noguchi; Akihira Miyachi; Makoto Mita; Shigeo Kawasaki

doi:10.1117/12.2231074

19 July 2016 Design of corrugated-horn-coupled MKID focal plane for CMB B-mode polarization

Yutaro Sekimoto, Shigeyuki Sekiguchi, Shibo Shu, Masakazu Sekine, Tom Nitta, Masato Naruse, Agnes Dominjon, Takashi Hasebe, Wenlei Shan, Takashi Noguchi, Akihira Miyachi, Makoto Mita, Shigeo Kawasaki

Author Affiliations +

Proceedings Volume 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII; 99142A (2016) https://doi.org/10.1117/12.2231074
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

A focal plane based on MKID has been designed for cosmic microwave background (CMB) B-mode polarization experiments. We are designing and developing a focal plane with broadband corrugated horn array, planar OMT, 180 degree hybrid, bandpass filters, and MKIDs. The focal plane consists of 3 octave bands (55 - 108 GHz, 80 - 160 GHz, 160 - 320 GHz), 10 hexagonal modules. Broadband corrugated horn-array has been directly machined from an Al block and measured to have a good beam shape which is consistent with electromagnetic field simulations in octave bands. The horn array is designed to be low standing-wave, light weight, and electromagnetic shield. The broadband 4 probes ortho-mode transducer (OMT) is fabricated on Si membrane of an SOI wafer. A broadband 180 degree hybrid made with coplanar waveguide (CPW) is used to reduce higher modes of the circular waveguide. Two bandpass filters of each polarization are patterned with Nb microstrip. A prototype of the broadband corrugated horn coupled MKIDs has been fabricated and tested.

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Yutaro Sekimoto, Shigeyuki Sekiguchi, Shibo Shu, Masakazu Sekine, Tom Nitta, Masato Naruse, Agnes Dominjon, Takashi Hasebe, Wenlei Shan, Takashi Noguchi, Akihira Miyachi, Makoto Mita, and Shigeo Kawasaki "Design of corrugated-horn-coupled MKID focal plane for CMB B-mode polarization", Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 99142A (19 July 2016); https://doi.org/10.1117/12.2231074

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