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Application US20190220770
Published 2019-07-18
Vibrationally Isolated Cryogenic Shield For Local High-quality Vacuum
The disclosure describes various aspects of a vibrationally isolated cryogenic shield for local high-quality vacuum. More specifically, the disclosure describes a cryogenic vacuum system replicated in a small volume in a mostly room temperature ultra-high vacuum (UHV) system by capping the volume with a suspended cryogenic cold finger coated with a high surface area sorption material to produce a localized extreme high vacuum (XHV) or near-XHV region. The system is designed to ensure that all paths from outgassing materials to the control volume, including multiple bounce paths off other warm surfaces, require at least one bounce off of the high surface area sorption material on the cold finger. The outgassing materials can therefore be pumped before reaching the control volume. To minimize vibrations, the cold finger is only loosely, mechanically connected to the rest of the chamber, and the isolated along with the cryogenic system via soft vacuum bellows.
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- 1. A cryogenic device for use in a vacuum chamber, comprising:
a suspended cold finger that forms a capping volume that covers or encloses a device under test (DUT), wherein the capping volume formed by the suspended cold finger is configured to have outgassing materials bounce off of the cold finger before reaching a critical volume over the DUT.
- 14. A method for using a cryogenic device in a vacuum chamber, comprising:
cooling a suspended cold finger of the cryogenic device that forms a capping volume that encloses a device under test (DUT), wherein the capping volume formed by the suspended cold finger is configured to have outgassing materials bounce off the cold finger before reaching a critical volume over the DUT; and performing one or more quantum operations using the DUT.
