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. Author manuscript; available in PMC: 2018 Feb 28.
Published in final edited form as: Rev Mod Phys. 2017 Dec 11;89(4):045004. doi: 10.1103/RevModPhys.89.045004

FIG. 1.

FIG. 1

An example of an apparatus for spin-exchange optical pumping (SEOP). This apparatus has been employed for photon scattering experiments. Whereas SEOP is typically performed in single cells for neutron spin-filter and magnetic resonance imaging applications, both electron and photon scattering applications employ a double cell configuration in which a target cell (TC) is linked to an optical pumping cell (OPC) through a connecting tube. Electron paramagnetic resonance and nuclear magnetic resonance are employed to measure the 3He polarization in the OPC and TC, respectively. Adapted from Ye et al. (2010)