Gravitational Wave Group

The vibration of CLIK generated by GM Refrigerator

Vibration

The GM refrigerator has vibration generated by the friction of a piston. This vibration should be below the seismic noise level in Kamioka mine. Altough the CLIK has soft connection between the 2nd head of the GM and the 4 K shield, some excited resonances for the frequency range from 30 Hz to 200 Hz are obstractive. Some remedies should be required.