Production of a spinpolarized keV Sr+ ion beam by laser-optical pumping
Production of a spinpolarized keV Sr+ ion beam by laser-optical pumping
复制标题
通过激光光泵浦产生自旋偏振 keV Sr 离子束
DOI：
10.1016/0168-9002(94)01702-6
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发表时间：
1995
影响因子：
1.4
通讯作者：
H. Lutz
中科院分区：
文献类型：
--
作者：
H. Reihl;C. Sprengel;Z. Roller;H. Lutz
利用准直性好、能散很小的Sr ~+离子束，结合激光共线泵浦，获得了高电子自旋极化的离子束。Sr ~+离子是在镀铱的钽管中表面电离产生的，其强度为μA，并被引出到束流导引系统中。52 S1 2 → 52 P1 2跃迁由反平行于离子束传播的圆偏振激光（421.6nm）泵浦。通过一种新开发的方法，激光器被主动稳定到S P跃迁。最丰富的88 Sr+同位素的基态的最终电子自旋极化被测量为大于90%。
Using a well collimated Sr+ion beam with very small energy spread in combination with collinear laser-optical pumping, we have obtained a beam with high electron spin polarization. The Sr+ions were produced with μA intensity by surface ionisation in a point-like hot iridium-plated Ta tube and extraction into a beam guiding system. The 52S1 252P1 2transition was pumped by circularly polarized laser light (421.6 nm) propagating antiparallel to the ion beam. The laser is actively stabilized to the SP transition by means of a newly developed method. The final electron spin polarisation of the ground state for the most abundant88Sr+isotope was measured to be greater than 90%.