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.