Optical pumping of helium-3 at high pressure and magnetic field

Abstract : At low magnetic field, the efficiency of metastability-exchange optical pumping of helium-3 is known to be optimal for pressures around 1 mbar. We demonstrate on several examples (up to 32 mbar) that operating in a higher magnetic field (up to 0.12 T) can significantly increase the nuclear polarisations achieved at higher pressures. Since polarisation measurements cannot be made with the standard technique, we use a general optical method based on absorption measurements at 1083 nm to measure the polarisation of the atoms in the ground state.
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Contributor : Pierre-Jean Nacher <>
Submitted on : Sunday, July 18, 2004 - 7:08:47 PM
Last modification on : Thursday, March 21, 2019 - 1:10:24 PM
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  • HAL Id : hal-00002223, version 1


Pierre-Jean Nacher, Emmanuel Courtade, Marie Abboud, Alice Sinatra, Geneviève Tastevin, et al.. Optical pumping of helium-3 at high pressure and magnetic field. 2002, pp.2225-2236. ⟨hal-00002223⟩



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