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An ion trap storage/time‐of‐flight mass spectrometer

 

作者: Steven M. Michael,   Mingta Chien,   David M. Lubman,  

 

期刊: Review of Scientific Instruments  (AIP Available online 1992)
卷期: Volume 63, issue 10  

页码: 4277-4284

 

ISSN:0034-6748

 

年代: 1992

 

DOI:10.1063/1.1143725

 

出版商: AIP

 

数据来源: AIP

 

摘要:

An ion trap/time‐of‐flight (TOF) mass spectrometer combination has been developed in order to combine the storage capabilities of an ion trap with the speed and resolution of a time‐of‐flight device. The ion trap is an rf quadrupole trap which operates in the total storage mode, i.e., with the dc voltage=0 on the end caps and rf voltage on the ring electrode. The trap has an ion storage time of ≥2 s at an rf potential of 310 Vpp. The stored ions are ejected into the time‐of‐flight device using a −150 V dc pulse on the exit end cap which causes the ion trajectories in the trap to become unstable. The ions are mass analyzed using either a linear or reflectron TOF. In the linear mode the resolution is 240 while in the reflectron mode a resolution of 1300 atm/z93 is achieved. The storage capabilities of this device may have important applications towards enhancing sensitivity, the study of very slow metastable decay, and photodissociation mass spectrometry and spectroscopy.

 

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