Development of Superconducting Detectors for Measurements of Cosmic Microwave Background
- Hattori, K.
- Hazumi, M.
- Ishino, H.
- Kawai, M.
- Kibayashi, A.
- Kimura, N.
- Mima, S.
- Noguchi, T.
- Okamura, T.
- Sato, N.
- Tajima, O.
- Tomaru, T.
- Watanabe, H.
- Yoshida, M.
DOIAbstract
AbstractWe present our recent development of superconducting detectors for measurements of cosmic microwave background. We have fabricated antenna-coupled superconducting tunnel junctions (STJs). Two different types of STJs have been fabricated: the parallel-connected twin junction and the microstrip. Both types of STJs made of Nb and Al have successfully detected 80GHz millimeter wave radiation with photon-assisted tunneling. We have also developed microwave kinetic inductance detectors (MKIDs). The MKIDs offer us high multiplexing factors with a single readout line using the frequency-domain readout. We have developed abosrption-type and transmission-type MKIDs whose resonators are formed with either coplanar waveguides (CPW) or microstri...
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