Patent ID: 8080786
Filing Date: 2011-12-20
Classification: H01J

Abstract:
1. A mass spectrometer comprising: an ion source for generating ions; an electron capture dissociation device comprising a linear ion trap having linear multipole electrodes applied with a radio frequency electric field and wall electrodes that are arranged on both ends in the axis direction of the linear multipole electrodes, said wall electrodes being provided with holes on the axis of the linear multipole electrodes and applied with a direct-current voltage to generate a wall electric field, a magnetic field-generating unit that generates a magnetic field containing the same axis as the axis of the linear multipole electrodes and surrounds the linear ion trap, and an electron source arranged opposite to the linear multipole electrodes with sandwiching one of the wall electrodes, wherein ions are introduced and ejected from the other wall electrode not on the side of the electron source; and a mass analysis unit for performing mass analysis of ions.