Systematic characterization of a Ne, Ar, Kr rare-gas moderated positron beam and spin polarization measurements

Povolo, L.; Mariazzi, S.; Bettonte, M.; Penasa, L.; Caravita, R.; Brusa, R.S.

doi:10.1016/j.nimb.2024.165376

Nuclear Instruments and Methods in Physics Research Section B:

2024

DOI: 10.1016/j.nimb.2024.165376

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Systematic characterization of a Ne, Ar, Kr rare-gas moderated positron beam and spin polarization measurements

L. Povolo,

S. Mariazzi,

M. Bettonte

et al.

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Cited by 2 publications

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Measurement of the Spin Polarization of a Slow Positron Beam Using Circularly Polarized Microwave Radiation

Newson,

Cassidy

2024

Phys. Rev. Lett.

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We have measured the spin polarization of a slow positron beam via state-selective depopulation of 2S13 positronium atoms, generated by passing the beam through a gas cell. Our method employs circularly polarized microwave radiation to drive 2S13→2P13 transitions, for which either ΔmJ=+1 or ΔmJ=−1, and relies on the fact that asymmetries between the two cases yield the underlying positron beam polarization. Using this technique we show that the polarization of a positron beam derived from a solid neon moderator may be increased from 30% to 90% by increasing the moderator thickness, with an associated reduction in beam intensity of 60%. Published by the American Physical Society 2024

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Measurement of the Spin Polarization of a Slow Positron Beam Using Circularly Polarized Microwave Radiation

Newson,

Cassidy

2024

Phys. Rev. Lett.

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New Bunched Positron Beam at the AntiMatter Laboratory in Trento: Planned Quantum Experiments with Positronium

Mariazzi,

Caravita,

Penasa

et al. 2024

Acta Phys. Pol. A

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Systematic characterization of a Ne, Ar, Kr rare-gas moderated positron beam and spin polarization measurements

Cited by 2 publications

References 51 publications

Measurement of the Spin Polarization of a Slow Positron Beam Using Circularly Polarized Microwave Radiation

Measurement of the Spin Polarization of a Slow Positron Beam Using Circularly Polarized Microwave Radiation

New Bunched Positron Beam at the AntiMatter Laboratory in Trento: Planned Quantum Experiments with Positronium

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