A versatile and reliably reusable ultrahigh vacuum viewport

Weatherill, K. J.; Pritchard, J. D.; Griffin, P. F.; Dammalapati, U.; Adams, C. S.; Riis, E.
February 2009
Review of Scientific Instruments;Feb2009, Vol. 80 Issue 2, pN.PAG
Academic Journal
We present a viewport for use in ultrahigh vacuum (UHV) based upon the preflattened solder seal design presented in earlier work [Cox et al., Rev. Sci. Instrum. 74, 3185 (2003)]. The design features significant modifications to improve long term performance. The windows have been leak tested to less than 10-10 atm cm3/s. From atom number measurements in an optical dipole trap loaded from a vapor cell magneto-optical trap inside a vacuum chamber accommodating these viewports, we measure a trap lifetime of 9.5 s suggesting a pressure of around 10-10 Torr limited by background rubidium vapor pressure. We also present a simplified design where the UHV seal is made directly to a vacuum pipe.


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