Temperature-related effects in the polarization of atoms in a magnetized plasma as a promising feature towards high He3 nuclear polarization

Alexander Makarchenko, Vyacheslav Kuzmin, Kajum Safiullin, and Murat Tagirov
Phys. Rev. A 106, 023101 – Published 1 August 2022

Abstract

We report on further investigation of nuclear hyperpolarization of He3 in magnetized plasma at a magnetic field of 3.66 T and at different experimental conditions in a dual cell of relatively large volume, compared to those reported in the original polarization of atoms in a magnetized plasma (PAMP) paper by Maul et al. [Phys. Rev. A 98, 063405 (2018)]. It was found that steady-state nuclear polarizations obtained by this method strongly increase with temperature and rf gas discharge power. We managed to reach almost 8% at the highest possible temperature in our setup which is to date the highest polarization obtained by this method at 10 mbar. It was also shown that atomic oxygen in plasma, considered as an impurity, could be a good probe of plasma parameters relevant for the PAMP process, either in the temperature or the metastable He3 density. The polarization buildup rates with the cell temperature stabilized near room temperature are found to be of the order of 1 s1, which is by two orders of magnitude faster than was reported in the original PAMP paper for the same filling pressure. These observations promise a further optimization of experimental conditions towards strong and fast hyperpolarization by this method.

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  • Received 11 February 2022
  • Revised 27 May 2022
  • Accepted 18 July 2022

DOI:https://doi.org/10.1103/PhysRevA.106.023101

©2022 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalPlasma Physics

Authors & Affiliations

Alexander Makarchenko1, Vyacheslav Kuzmin1,*, Kajum Safiullin1,†, and Murat Tagirov1,2

  • 1Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
  • 2Tatarstan Academy of Sciences, 420111 Kazan, Russia

  • *slava625@yandex.ru
  • kajum@inbox.ru

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Vol. 106, Iss. 2 — August 2022

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