Design and characterization of a velocity-map imaging apparatus for low-energy photo-ion spectroscopy using magneto-optically trapped atoms

被引：10

作者：

Fang, Feng ^{[1
,2
,3
]}

Zhou, Wenchang ^{[1
,2
,3
]}

Li, Yufan ^{[4
]}

Qian, Dongbin ^{[1
,3
]}

Luo, Changjie ^{[1
,2
,3
]}

Zhao, Dongmei ^{[1
,3
]}

Ma, Xinwen ^{[1
,3
]}

Yang, Jie ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 73000, Peoples R China

[4] Anyang Normal Univ, Sch Phys & Elect Engn, Anyang 455000, Peoples R China

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2021年 / 92卷 / 04期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

D O I：

10.1063/5.0033595

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We present a velocity-map imaging (VMI) apparatus coupled with a magneto-optical trap (MOT) of Rb-87 atoms designed for low-energy photo-ion spectroscopy. The VMI-electrode geometry uses a three-electrode configuration, and the focusing electric field is optimized based on systematic simulations of relatively low-energy ions. To calibrate the apparatus, we use resonant two-color two-photon ionization of rubidium atoms as Doppler-selected ions. This VMI system provides an accuracy of 0.15 m/s and a resolution of 7.5 m/s for photoions with speeds below 100 m/s. Finally, details of the design, construction, and testing of the VMI-MOT system are presented.

引用

页数：6