Publication Details (including relevant citation information):
Vacuum 39(6), 563 - 564 (1989).
Keywords: Optical window; Indium seal; Ultrahigh vacuum; Aluminum alloys; He-Ne Laser
A bakeable (120°C) optical window sealed with indium for ultrahigh vacuum is described. The surfaces to be in contact with the seal are coated with Cr (0.05 μm) and Au (0.2 μm) using an ion plating method. Since the surfaces are sealed with an indium wire using a hot pressing method (150°C, 85 kg cm−2), the newly developed optical window is free of thermal distortion.