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Published April 15, 1988 | Published
Journal Article Open

Spin-polarized 3He nuclear targets and metastable 4He atoms by optical pumping with a tunable, Nd:YAP laser


Several Nd:YAP lasers were constructed which could be broadly tuned in the 1083-nm region which includes the helium 23S-23P transition, using a Lyot filter and thin, uncoated etalons within the laser cavity. 1 W of power could be extracted at 1083 nm through a 1% transmitting output coupler. This laser beam was used to optically pump metastable 4He and 3He 23S helium atoms in a weak discharge cell, spin polarizing the metastable ensemble. In a 3He cell the polarization is transferred to the nuclear spin system. A 3He target cell at 0.3 Torr was polarized to 52% in a few minutes. We describe the application of this system to the design of polarized targets for experiments in nuclear physics.

Additional Information

Copyright © 1988 American Institute of Physics. Received 11 November 1987; accepted 10 December 1987. The authors acknowledge the interest and support of Texas Instruments, Dallas, TX (C.L.B. and L.D.S.); Centre National de la Recherche Scientifique, Paris, France (M.L. and P.J.B.); National Science Foundation Grant No. PHY85-05682 (R.G.M., R.D.M., and C.E.W.). The interest of the Scientific Affairs Division of NATO in this research is also acknowledged.

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