Ion-trap mass analyzing apparatus and ion trap mass analyzing me

Details Ion-trap mass analyzing apparatus and ion trap mass analyzing me Ion-trap mass analyzing apparatus and ion trap mass analyzing me

1998-06-02

2000-10-31

Nguyen, Kiet T.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250281, 250282, H01J 4900

Patent

active

061406414

ABSTRACT:
An numerical analysis time which is assigned to mass select one ion species having a specific mass-to-charge ratio mass selected is divided into the first part time and the second part time, and a dipole auxiliary electric field capable of spatially reducing a spread is superimposed in the first part time of the numerical analysis time and a quadrupole auxiliary voltage capable of rapidly emitting ions when position coordinates are large is superimposed in the second part of the time. Therefore, the initial spatial spread is reduced in the first part time and the trajectories of ions is rapidly amplified in the second part time, and the ions are emitted. Thus, the entire mass sweep time can be reduced and a high-resolution numerical analysis can be accelerated.

REFERENCES:
patent: 5572025 (1996-11-01), Cotter et al.
patent: 5610397 (1997-03-01), Kelley

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