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US 11,464,102 B2Granted
Methods and systems for treatment of superconducting materials to improve low field performance
AssigneeFermi Research Alliance, LLC
InventorsAlexander Romanenko, Sam Posen, Anna Grassellino
Life of this patent
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Abstract
A system and method for treating a cavity comprises preparing a superconducting radio frequency (SRF) cavity for removal of a dielectric layer from on an inner surface of the SRF cavity, subjecting the SRF cavity to a heat treatment in order to remove the dielectric layer from the inner surface of the SRF cavity, and preventing the development of a new dielectric layer on the inner surface of the SRF cavity by preventing an interaction between the inner surface of the SRF cavity and atmospheric gasses.
Claims13
A method comprising:
- preparing a device for removal of a dielectric layer from on an inner surface of the device;
- removing the dielectric layer from the inner surface of the device;
- and
- reducing two-level-system (TLS) degradation of the device, wherein reducing TLS degradation of the device further comprises:
- preventing development of a new dielectric layer on the inner surface of the device by preventing an interaction between the inner surface of the device and atmospheric gasses by adding a capping layer to the inner surface of the device, the capping layer comprising Aluminum Oxide.
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A method for treating a cavity comprising:
- preparing a superconducting radio frequency (SRF) cavity for quantum computing applications, for removal of a dielectric layer from on an inner surface of the SRF cavity;
- subjecting the SRF cavity to a heat treatment in order to remove the dielectric layer from the inner surface of the SRF cavity;
- and
- reducing TLS degradation of the SRF cavity, wherein reducing TLS degradation of the SRF cavity further comprises:
- preventing the development of a new dielectric layer on the inner surface of the SRF cavity by preventing an interaction between the inner surface of the SRF cavity and atmospheric gasses;
- and
- wherein the prepared SRF cavity has a quality factor greater than 1×1010 at temperatures between 1.4 Kelvin and 20 mKelvin.
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Dependencies are inferred from the claim text.