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A thermostatic control system for nonlinear optical experiments at low temperatures

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3 Author(s)
Lesch, G.H. ; Inst. of Molecular Biology, Univ. of Oregon, Eugene, OR, USA ; Johnson, J.C. ; Massey, G.A.

A cryostat specifically designed for maintaining nonlinear optical crystals at temperatures between room temperature and -175°C is described. The sample is held in a vacuum environment, and its temperature is kept within 0.1°C of the desired value by applying regulated power to a sample holder which is connected to a liquid-nitrogen-cooled heat sink through a thermal resistance. The system is easily constructed and can be evacuated with a mechanical pump. It can operate longer than 6 h on a single filling of liquid nitrogen with the pump disconnected.

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Quantum Electronics, IEEE Journal of  (Volume:12 ,  Issue: 2 )