Modification of Reflectron Time-of-Flight Mass Spectrometer for Photodissociation of Mass-Selected Cluster lons

作     者：Yu-chao Zhao Zeng-guang Zhang Jin-yun Yuan Hong-guang Xu Wei-jun Zheng 

作者机构：Beijing National Laboratory for Molecular Science State Key Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of sciences Beijing 100190 China 

出 版 物：《Chinese Journal of Chemical Physics》 (化学物理学报（英文）)

年 卷 期：2009年第22卷第6期

页      面：655-662,J0002页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：V. ACKNOWLEDGMENTS This work supported by the National Natural Science Foundation of China (No.20853001). We thank Professor Qi-he Zhu and Professor Zhen Gao for valuable discussions 

主　　题：Reflectron time-of-flight mass spectrometer Photodissociation Mass-selection Cluster 

摘      要：We introduce a modification of reflectron time-of-flight mass spectrometer for laser photodissociation of mass-selected ions. In our apparatus, the ions of interests were selected by a mass gate near the first space focus point and decelerated right after the mass gate, were then crossed by a laser beam for dissociation. The daughter ions and surviving parent ions were re-accelerated and analyzed by the reflectron time-of-flight mass spectrometer. Compared to the designs reported by other research groups, our selection-deceleration-dissociation-reacceleration approach has better daughter-parent-ions-separation, easier laser timing, and better overlapping between the ion beam and laser beam. We also conducted detailed cal- culations on the parent ion and daughter ion flight times, and provided a simplified formula for the calibration of daughter ion mass.