DOE OSTI · 3001590
MEOP based 3 He polarization and injection system for experiments below 1 K
Abstract
Metastability exchange optical pumping (MEOP) is a widely used technique for producing polarized 3 He. In connection with an experiment to search for the electric dipole moment of the neutron (nEDM) we have built a MEOP based 3 He polarization and injection system to prepare 80 % polarized 3 He at room temperature which will be injected into a ∼ 400 mK measurement cell filled with superfluid 4 He. We describe the polarization and injection system, which is designed to allow for final concentrations of 10 -8 –10 -10 of 80% polarized 3 He in the superfluid filled measurement cell. Only ≈ 0.72% polarization loss due to gradients is expected during injection.
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Rao, T. [North Carolina State University, Raleigh, NC (United States)] (ORCID:0009000241597678), Barrón-Palos, L. [Universidad Nacional Autónoma de México (Mexico)], Berkutov, I. [North Carolina State University, Raleigh, NC (United States)], Crawford, C. B. [University of Kentucky, Lexington, KY (United States)] (ORCID:0000000219324334), Golub, R. [North Carolina State University, Raleigh, NC (United States)], Huffman, P. [North Carolina State University, Raleigh, NC (United States)], Konieczny, M. [Ithaca College, NY (United States)], Korobkina, E. [North Carolina State University, Raleigh, NC (United States)] (ORCID:0000000260983681), Reid, Austin [Tennessee Tech University, Cookeville, TN (United States)] (ORCID:0000000317412223), Salazar-Ángeles, B. [Universidad Nacional Autónoma de México (Mexico)], Smith, C. [University of Kentucky, Lexington, KY (United States)], Tat, R. [North Carolina State University, Raleigh, NC (United States)], Zanatta-Martínez, T. [Universidad Nacional Autónoma de México (Mexico)]. 2025-01-09. MEOP based 3 He polarization and injection system for experiments below 1 K. https://doi.org/10.1088/1748-0221%2F20%2F01%2Fp01007
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