Development of polarized 3He gas system as a spin analyzer for low energy neutrons

Sakai, Kazumitsu; Satō, Hiroshi; Yoshimi, A.; Asahi, K.; Masuda, Y.; Muto, S.; Ishimoto, S.; Morimoto, K.; Masaike, A.; Iinuma, Munekazu; Matsuda, Y.; Okumura, Kohshi; Haseyama, T.

doi:10.1016/s0168-9002(97)00843-7

Cited by 9 publications

(2 citation statements)

References 9 publications

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“…Measurements were performed at KEK in Japan (Sakai, 1997; Sakai et al , 1998), LANSCE (Haseyama et al , 2002), and the ILL (Heil et al , 1999b). At LANSCE, SEOP with diode lasers was employed with 56% (polarizer) and 29% (analyzer) 3 He polarization obtained in 6 bar cells.…”

Section: Neutron Spin-filtersmentioning

confidence: 99%

Optically polarizedHe3

et al. 2017

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This article reviews the physics and technology of producing large quantities of highly spin-polarized 3He nuclei using spin-exchange (SEOP) and metastability-exchange (MEOP) optical pumping. Both technical developments and deeper understanding of the physical processes involved have led to substantial improvements in the capabilities of both methods. For SEOP, the use of spectrally narrowed lasers and K-Rb mixtures has substantially increased the achievable polarization and polarizing rate. For MEOP nearly lossless compression allows for rapid production of polarized 3He and operation in high magnetic fields has likewise significantly increased the pressure at which this method can be performed, and revealed new phenomena. Both methods have benefitted from development of storage methods that allow for spin-relaxation times of hundreds of hours, and specialized precision methods for polarimetry. SEOP and MEOP are now widely applied for spin-polarized targets, neutron spin filters, magnetic resonance imaging, and precision measurements.

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Section: Neutron Spin-filtersmentioning

confidence: 99%

Optically polarizedHe3

et al. 2017

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“…The first application of NSFs to fundamental neutron physics was for measurements of the parity-violating neutron spin rotation in the 0.734 eV resonance in lanthanum. Measurements were performed at KEK in Japan (Sakai, 1997;Sakai et al, 1998), LANSCE (Haseyama et al, 2002), and the ILL (Heil et al, 1999b). At LANSCE, SEOP with diode lasers was employed with 56% (polarizer) and 29% (analyzer) 3 He polarization obtained in 6 bar cells.…”

Section: Applicationsmentioning

confidence: 99%

Optically Polarized $^3$He

Gentile,

Nacher,

Saam

et al. 2016

Preprint

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This article reviews the physics and technology of producing large quantities of highly spin-polarized 3 He nuclei using spin-exchange (SEOP) and metastability-exchange (MEOP) optical pumping. Both technical developments and deeper understanding of the physical processes involved have led to substantial improvements in the capabilities of both methods. For SEOP, the use of spectrally narrowed lasers and K-Rb mixtures has substantially increased the achievable polarization and polarizing rate. For MEOP nearly lossless compression allows for rapid production of polarized 3 He and operation in high magnetic fields has likewise significantly increased the pressure at which this method can be performed, and revealed new phenomena. Both methods have benefitted from development of storage methods that allow for spin-relaxation times of hundreds of hours, and specialized precision methods for polarimetry. SEOP and MEOP are now widely applied for spin-polarized targets, neutron spin filters, magnetic resonance imaging, and precision measurements.

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Fundamental physics with polarized nuclear spins —Spin maser for the neutron EDM measurement

et al. 2000

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Nuclear spin maser based on a new masing mechanism is proposed, which is applicable to high-precision measurements of the electric dipole moment of neutron. To test this idea, a spin maser with a spin-polarized 129Xe gas as a working substance was constructed. After a detailed investigation of the spin maser operation in an ordinary spin-masing mechanism, we introduced an additional component in the feedback loop of the maser in order to implement the proposed masing mechanism. A self-sustained oscillation of transverse spins has been observed which clearly indicates a realization of spin masing arising from the new masing mechanism.

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Development of polarized 3He gas system as a spin analyzer for low energy neutrons

Cited by 9 publications

References 9 publications

Optically polarizedHe3

Optically polarizedHe3

Optically Polarized $^3$He

Fundamental physics with polarized nuclear spins —Spin maser for the neutron EDM measurement

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