A gas circulation system, using a Toepler pump, for the construction of a polarized 3He target

Abstract
A flow system capable of circulating polarized 3He gas between a target chamber and an optical pumping volume has been constructed. The two vessels hold the gas at pressures of approximately 760 and 1 Torr, respectively. The circulation unit consists of a reliable Toepler pump and a gas retrieval device made from a heated length of glass capillary tubing with a copper wire insert. Under the conditions of our experiment, the 3He gas circulation rate may be varied between 0.50 and 0.15 cc STP min−1.

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