Before entering a mass spectrometer, a beam of singly charged ions are filtered by a velocity selector with crossed electric and magnetic fields of E=69 V/m and B=95 mT, respectively, such that v, E and B are mutually perpendicular to one another. The ions entering the slit are forced to move in a semi-circular path due to the presence of a uniform magnetic field Bo=40 T perpendicular to the plane of the ion trajectory, and produce a spot a distance D=50 cm from the entrance slit, on a sensitive plate. Calculate the mass (in au, atomic unit) of an ion in the beam. Electronic charge -19 e=1.6x10 C, 1 au=1.67x1027 kg.

Before entering a mass spectrometer, a beam of singly charged ions are filtered by a velocity selector with crossed electric and magnetic fields of E=69 V/m and B=95 mT, respectively, such that v, E and B are mutually perpendicular to one another. The ions entering the slit are forced to move in a semi-circular path due to the presence of a uniform magnetic field Bo=40 T perpendicular to the plane of the ion trajectory, and produce a spot a distance D=50 cm from the entrance slit, on a sensitive plate. Calculate the mass (in au, atomic unit) of an ion in the beam. Electronic charge -19 e=1.6x10 C, 1 au=1.67x1027 kg.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter26: Electromagnetism

Section26.1: Interactions Of Electric And Manetic Fields And Matter

Problem 2PP

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