Metastability Exchange Optical Pumping of Helium-3 at High Pressures and 1.5 T: Comparison of two Optical Pumping Transitions

Chapter 6 is dedicated to the presentation of the main results of the present work: Characterisation of the plasma, systematic probe measurements to evaluate the robustness of

ground state for the metastable atoms having a velocity very different from the velocity in resonance. with

observable by diffusion of atoms out of the beam, quenching on the cell walls etc., and y~(v) denotes the rate of transfer of atomic ground state population. out

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Of course the saturation of the build-up rate at high laser power (Fig. 15b) ultimately sets a limit to the manageable flow rates. Larger amounts of polarized gas can then be

We report here on selected results, mainly regarding nuclear relaxation, obtained using an intense pumping light in standard MEOP conditions (low gas pressure and low magnetic

uncontrolled effects of the discharge on the coatings themselves limit the lowest optical pumping temperature to a value where Tr (relaxation time in the absence of a

A convenient way to monitor the ground state nuclear orientation is to measure the circular polarization of some visible lines emitted by the cell /3/ : as a matter of fact,