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报告内容
摘 要
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The recently proposed terrestrial
low-frequency gravitational-wave (GW) detectors offer the possibility of
studying GW physics in a lower frequency range than the audio band km-scale
interferometers (LIGO, VIRGO and KAGRA). The superconducting gravity
gradiometer (SGG) is a GW strain sensor in the 0.01 Hz to 1 Hz band. A
low-frequency GWdetectorbased on the concept of the SGG, called “a tunable
free-mass GW detector,” was proposed as early as in 1979 by Wagoner, Will and
Paik. We outline the design for a new
type of low-frequency GW detector based on the SGG approach. By using six levitated test masses, a
“spherical” GW detector capable of detecting the source direction and wave
polarization could be constructed. The
design concept of a new detector that could reach a sensitivity of 10-20 Hz-1/2at 0.1 Hz is discussed.
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