Ultra Quiet Technology

(below 40 nm in the 5 Hz – 1000 Hz Region)

The weak point of cryofree dilution refrigerators is the vibrations generated by the pulse

tube cold head. Even if the valve motor is remote, the helium gas expansion in the cold

head is generating a wide range of very nasty vibrations for most of the experiments.

The only definitive solution to cut all vibrations is to mechanically decouple

completely the cold head and its valve motor from the dilution unit. The big

challenge is to maintain the cooling performance of the refrigerator with no physical

contact from the cold head first and second stages to the whole stages of the

dilution refrigerator down to the mixing chamber. This unique performance is completed

within the Ultra Quiet Technology ™ developed by Cryoconcept.