High nuclear polarization in He-3 and He-3-He-4 gas mixtures by optical pumping with a laser diode - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics B - Laser and Optics Année : 1996

High nuclear polarization in He-3 and He-3-He-4 gas mixtures by optical pumping with a laser diode

M. Meyerhoff
  • Fonction : Auteur
Pierre-Jean Nacher
G. Tastevin

Résumé

New diode lasers delivering 50 mW output power at 1083 nm are shown to be efficient sources for optical pumping of helium. They can polarize nuclei in a He-3 gas up to M = 50% over the pressure range 0.4-1.6 torr. Larger nuclear polarizations M of He-3 nuclei, of order 80%, can be obtained in He-3-He-4 mixtures when the laser frequency is tuned to a He-4 line. A standard optical measurement of nuclear polarization M has been extended to the case of He-3-He-4 mixtures. The effect of various parameters on the steady-state polarization M and on the pumping time T-p is discussed.
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Dates et versions

hal-02016722 , version 1 (12-02-2019)

Identifiants

  • HAL Id : hal-02016722 , version 1

Citer

E. Stolz, M. Meyerhoff, N. Bigelow, M. Leduc, Pierre-Jean Nacher, et al.. High nuclear polarization in He-3 and He-3-He-4 gas mixtures by optical pumping with a laser diode. Applied Physics B - Laser and Optics, 1996, 63 (6), pp.629--633. ⟨hal-02016722⟩
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