Sensitivity spectrum of a superconducting attometer
Andronik K. I. , Pudalov V. M.
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.
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![](/ps/1314/article_19859_800_head.png "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"<sup>18</sup> m (6 attometers) at an averaging time of 2.5Χ 10<sup>3</sup> s in the vibration frequency range 10<sup>3</sup>-3 Χ 10<sup>4</sup> Hz.")