In a Bainbridge mass spectrometer, ions pass undeflected through a selector with electric field E and magnetic field B₁, then enter an analyzer field B₂ and move in a circle of radius R. What is m/|q|?
Options

Question

In a Bainbridge mass spectrometer, ions pass undeflected through a selector with electric field E and magnetic field B₁, then enter an analyzer field B₂ and move in a circle of radius R. What is m/|q|?

Options

G1 Physics · Accepted Answer

The selector gives v=E/B₁. The analyzer gives R=mv/(|q|B₂). Hence m/|q|=RB₁B₂/E.