Magnetic-field coils for metastability-exchange optical pumping, spectroscopy, and magnetic resonance of helium

被引：0

作者：

Nacher, Pierre-Jean ^{[1
]}

机构：

[1] Sorbonne Univ, Univ PSL, Coll France, Lab Kastler Brossel,ENS,CNRS, 24 rue Lhomond, F-75005 Paris, France

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2024年 / 95卷 / 08期

关键词：

Optical pumping on the 23S-23P transition (1083 nm) of metastable 3He or 4He atoms is used for science and applications. Gas is usually enclosed in elongated cells with lengths ranging from several centimeters to several meters for efficient absorption. Good magnetic-field homogeneity is needed for weak diffusion-induced relaxation and long nuclear magnetic resonance (NMR) signal lifetimes. A compact coil system is designed using a target-oriented numerical optimization method. It provides a suitably uniform field over cell volumes; with characteristics depending on the chosen optimization parameters. Additional pairs of coils can be used to generate transverse field components with contributions to the total field inhomogeneities that are discussed. © 2024 Author(s);

D O I：

10.1063/5.0216482

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Optical pumping on the 2(3)S-2(3)P transition (1083 nm) of metastable He-3 or He-4 atoms is used for science and applications. Gas is usually enclosed in elongated cells with lengths ranging from several centimeters to several meters for efficient absorption. Good magnetic-field homogeneity is needed for weak diffusion-induced relaxation and long nuclear magnetic resonance (NMR) signal lifetimes. A compact coil system is designed using a target-oriented numerical optimization method. It provides a suitably uniform field over cell volumes, with characteristics depending on the chosen optimization parameters. Additional pairs of coils can be used to generate transverse field components with contributions to the total field inhomogeneities that are discussed.

引用

页数：9

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