Source INS x X B X X + 1 x X Particle detector X X X X X X X R X X X хв. x X x X x x x Figure 11.19 A schematic of the Bainbridge mass spectrometer, showing charged particles leaving a source, followed by a I velocity selector where the electric and magnetic forces are balanced, followed by a region of uniform magnetic field where the particle is ultimately detected.
The Bainbridge spectrometer works by ionizing particles, sending them through a velocity selector, and then detecting a given charge-to-mass ratio based on its trajectory in a uniform magnetic field (See Fig 11.19 in Ch 11.7 e in your book). Suppose your spectrometer works by altering the electric field of the velocity selector to scan for ions. If a singly-charged ion of mass 164.1 amu* is scanned when the electric field is 3.12 N/C, what electric field would detect a doubly-charged ion of mass 260.4 amu? Give your answer in units of N/C. *amu stands for "atomic mass units" which is a unit of mass, convenient for the atomic/molecular scale.
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