Passively pumped, polycrystalline ceramic high and ultra-high vacuum chambers

DWPI Title: Sealed, passively pumped vacuum chamber comprises body formed of polycrystalline ceramic, where body including one window recess and one window, each of windows formed of transparent ceramic, each of windows located in corresponding one of window recesses
Abstract: A sealed, passively pumped, polycrystalline ceramic vacuum chamber and method for fabricating the chamber are disclosed. The body of the vacuum chamber is made from a polycrystalline ceramic, for example, alumina. The vacuum chamber includes one or more windows made from a transparent ceramic, for example, sapphire, to accommodate optical access, while remaining amorphous-glass free to minimize or eliminate helium permeation. The vacuum chamber components are joined via laser welding or furnace brazing and the completed chamber is bakeable at temperatures up to 400° C. The vacuum chamber can operate at high or ultra-high vacuum pressures for an extended period through the use of one or more getter-based pumps. The vacuum chamber may include one or more atomic sources depending upon the application.
Use: Sealed, passively pumped vacuum chamber.
Advantage: The sealed, passively pumped vacuum chamber improves optical performance of the vacuum chamber.
Novelty: Sealed, passively pumped vacuum chamber comprises a body (110) formed of a polycrystalline ceramic, where the body including one window recess and one window, each of the windows formed of a transparent ceramic, each of the windows located in a corresponding one of the window recesses.
Filed: 4/6/2020
Application Number: US16840637A
Tech ID: SD 14819.0
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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