The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Development of Superconducting Low-frequency Gravitational-wave Telescope (SLGT): Technical Challenge and Feasibility

  • Lee, Yong Ho (Korea Research Institute of Standards and Science) ;
  • Ahn, Sang-Hyeon (Korea Astronomy & Space Science Institute) ;
  • Bae, Yeong-Bok (Korea Astronomy & Space Science Institute) ;
  • Kang, Gungwon (Korea Institute of Science and Technology Information) ;
  • Kim, Chunglee (Korea Astronomy & Space Science Institute) ;
  • Kim, Whansun (National Institute for Mathematical Sciences) ;
  • Oh, John J. (National Institute for Mathematical Sciences) ;
  • Oh, Sang Hoon (National Institute for Mathematical Sciences) ;
  • Park, Chan (Korea Institute of Science and Technology Information) ;
  • Son, Edwin J. (National Institute for Mathematical Sciences) ;
  • Paik, Ho Jung (U. of Maryland)
  • Published : 2017.10.10
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Abstract

Recent success of gravitational wave (GW) detection by LIGO opened a new window to expand our understanding of the Universe. In addition to LIGO, several other developments are going on or under planning. However, each of these detectors has a specific sensitive frequency range. There is a missing frequency band, 0.1-10 Hz, where detectors loose sensitivity significantly due to Newtonian noise on the Earth. We introduce a plan to develop a Superconducting Low-frequency Gravitational- wave Telescope (SLGT), which can observe massive black holes in 0.1-10 Hz. The SLGT system consists of magnetically levitated six test masses, superconducting quantum interference devices (SQUIDs), rigid support frame, cooling system, vibration isolation, and signal acquisition. By taking the advantage of nearly quantum-limited low-noise SQUIDs and capacitor bridge transducers, SLGT's detection sensitivity can be improved to allow astrophysical observation of black holes in cosmological distances. We present preliminary design study and expected sensitivity, and its technical feasibility.

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