Note: reliable and reusable ultrahigh vacuum optical viewports

The Review of Scientific Instruments
P Arora, A Sen Gupta

Abstract

We report a simple technique for the realization of ultrahigh vacuum optical viewports. The technique relies on using specially designed thin copper knife-edges and using a thin layer of Vacseal(®) on tip of the knife-edges between the optical flat and the ConFlat(®) (CF) flange. The design of the windows is such that it gives uniform pressure on the flat without breaking it. The assembled window is a complete unit, which can be mounted directly onto a CF flange of the vacuum chamber. It can be removed and reused without breaking the window seal. The design is reliable as more than a dozen such windows have survived several bake out and cooling cycles and have been leak tested up to 10(-11) Torr l/s level with a commercial Helium leak detector. The advantages of this technique are ease of assembly and leak proof sealing that survives multiple temperature cycling making the windows reliable and reusable.

References

May 5, 2007·The Review of Scientific Instruments·Bernd KaltenhäuserTilman Pfau
Mar 5, 2009·The Review of Scientific Instruments·K J WeatherillE Riis
Jul 5, 2011·The Review of Scientific Instruments·Neal SolmeyerDavid S Weiss

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Citations

Aug 1, 2016·The Review of Scientific Instruments·J D PritchardM Saffman

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