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VOLUME 35 (1982) | ISSUE 4 | PAGE 157
Sensitivity spectrum of a superconducting attometer
Measurements of the noise spectrum of a device for measuring small displacements and small vibration amplitudes are compared with the spectrum of thermal fluctuation vibrations of the sensitive element. This measurement device, a superconducting attometer, uses a superconducting resonator and has a sensitivity of 6x 10"18 m (6 attometers) at an averaging time of 2.5Χ 103 s in the vibration frequency range 103-3 Χ 104 Hz.