Guided-ion beam tandem mass spectrometer

GIBMS Guided ion beam tandem mass spectrometer... 

Fig. 3. Schematic diagram of the guided ion beam tandem mass spectrometer, double octopole configuration. Pumping speeds are shown. Ion sources available are listed and the microwave discharge source is shown. Adapted from [9]...

The experiments described here were performed on a guided ion beam tandem mass spectrometer [18] that was temporarily installed at the free electron laser facility FELIX (free electron laser for infrared experiments, FOM Institute for Plasma Physics, Nieuwegein, The Netherlands) [19]. A schematic of the experimental setup is shown in Fig. 3.2. Ions are generated in the ion source region (not... 

Figure 3.2 Schematic of the guided-ion-beam tandem mass spectrometer used in the present studies [60], The instrument is housed in...

The Apparatus. Experimental methods used in our laboratory to measure gas phase bond dissociation energies have been detailed before (4,5,6,7), and involve the use of a "guided" ion beam tandem mass spectrometer. Ion beam instruments are two mass spectrometers... 

Iceman, C. R. Ionic reactions using a guided ion beam tandem mass spectrometer Collision induced dissociation and electronic state chromatography , PhD thesis, Chemistry Department, University of Utah, 2008. 

Argon or helium at a pressure of 100 Torr is bubbled through JP-10, generating a reactant flow that is 5% JP-10. The reactant mix is metered into the flow-tube through a leak valve where the pressure drops to a few tori-celli. The flow properties of the reactor have been discussed in detail previously. Briefly, the total pressure in the heated zone of the flow-tube varies from 3 to 1.2 Torr over the temperature range from 300 to 1700 K, while the residence time drops from 4.5 to 1.5 ms. The flow-tube exhaust is dumped into a temperature-stabilized ( 200 °C) ionization source where the pressure is 1 Torr. The analyte molecules can be ionized either by EI or by methane Cl. The ions are then mass analyzed by the tandem guided ion-beam quadrupole mass spectrometer described in the above-referenced publications. 

Maier (longitudinal tandem mass spectrometer) and Teloy and Gerlich (guided-ion-beam technique). (The former data were taken from their published paper and may be inaccurate, since the figure therein was small and the data were plotted on a logarithmic scale.) Note that in neither case has correction been made for target motion. Ep is the laboratory energy of the neon ion. 

TCID experiments employ tandem mass spectrometers of various types. Guided ion beam (GIB) instruments use a radio frequency octopole in the interaction region for high-efficiency collection of scattered products and low-energy ions. These instruments typically use a magnetic sector or Wien filter for initial mass analysis and... 

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