A 350 GHz SIS receiver on the nobeyama 10 m submillimeter telescope

Yutaro Sekimoto, Takeshi Sakai, Gaku Saito, Ken'ichi Tatematsu, Kunihiko Tanaka, Kotaro Kohno, Takashi Noguchi, Hiroyuki Iwashita, Toshikazu Takahashi, Naohisa Satou, Sozo Yokogawa, Seiichi Sakamoto, Nobuharu Ukita, Ryohei Kawabe, Tetsuya Ito, Hiroyuki Maezawa, Satoshi Yamamoto

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We have developed a low-noise submillimeter-wave SIS receiver (320-360 GHz) for a 10 m submillimeter telescope, which was installed at Nobeyama in 2000 February. This receiver and a millimeter-wave SIS receiver are mounted on the ceiling of the Cassegrain receiver cabin of the 10 m telescope. Two curved mirrors couple a shaped Cassegrain beam from the subreflector to mixer horns. The minimum noise temperature measured in front of the receiver was 52 K in double sideband (DSB) at a local oscillator (LO) frequency of 354 GHz, which corresponds to three-times quantum limits (3hv/kB). This noise temperature contributions are resolved into the optics, mixer, and IF parts. The temperature ripple of a two-stage Gifford-McMahon cryocooler has been reduced to be 2 mK peak-to-peak at the mixer block with a helium pot temperature stabilizer. Mechanical vibration (30 μm peak-to-peak) of the cold head degrades the receiver stability.

Original languageEnglish
Pages (from-to)951-958
Number of pages8
JournalPublications of the Astronomical Society of Japan
Issue number5
Publication statusPublished - 2001 Oct 25
Externally publishedYes


  • Instrumentation: detectors
  • Radio lines: general
  • Submillimeter
  • Techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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