Noise reduction method
AssigneeOxford Instruments Nanotechnology Tools Limited
InventorsAnthony J. Matthews, Mark Patton, Jeremy White
Life of this patent
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Abstract
There is provided a method of reducing noise in a cryogenic cooling system associated with a mechanical refrigerator forming part of said cooling system. The method comprises: monitoring vibrations in the cooling system during operation of the mechanical refrigerator; and modulating an operating frequency of the mechanical refrigerator based on the monitored vibrations so as to reduce the amplitude of said vibrations. This allows noise within the cooling system to be reduced.
Claims20
A method of reducing noise in a cryogenic cooling system, the method comprising:
- monitoring vibrations in the cryogenic cooling system during operation of only a single mechanical refrigerator;
- measuring vibration amplitudes in the monitored vibrations;
- determining transfer functions and structural resonance coupling for the cryogenic cooling system based on the measured vibration amplitudes;
- and
- modulating an operating frequency of the mechanical refrigerator based on the determined transfer functions and structural resonance coupling so as to reduce the vibration amplitudes of the monitored vibrations.
A frequency adjuster, comprising:
- a vibration detector adapted in use to:
- monitor vibrations associated with only a single mechanical refrigerator in a cryogenic cooling system;
- and
- measure vibration amplitudes in the monitored vibrations;
- and
- a controller adapted to:
- determine transfer functions and structural resonance coupling for the cryogenic cooling system based on the measured vibration amplitudes;
- and
- control an operating frequency of the mechanical refrigerator based on the determined transfer functions and structural resonance coupling so as to reduce the vibration amplitudes of the monitored vibrations.
Dependencies are inferred from the claim text.