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 . 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 limited by background rubidium vapor pressure. We also present a simplified design where the UHV seal is made directly to a vacuum pipe.
A versatile and reliably reusable ultrahigh vacuum viewport
K. J. Weatherill, J. D. Pritchard, P. F. Griffin, U. Dammalapati, C. S. Adams, E. Riis; A versatile and reliably reusable ultrahigh vacuum viewport. Rev. Sci. Instrum. 1 February 2009; 80 (2): 026105. https://doi.org/10.1063/1.3075547
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