Circular magnetic resonance accelerator

On January 9, 1932, Lawrence and Livingston were able to accelerate protons to a 1-MeV energy. Lawrence literally danced around the room with glee. The two partners then set out to build an even bigger cyclotron, which they originally called a circular magnetic resonance accelerator. 

Cyclotron sI-klo- tran [cycl- + -tron fr. the circular movement of the particles] (1935) n. The magnetic resonance accelerator for imparting very great velocities to heavier nuclear particles without the use of excessive voltages. 

Fig. 6 Schematic of a FTICR MS instrument. This type of MS consists of an ion cyclotron resonance (ICR) analyzer cell that is situated in the homogeneous region of a large magnet. The ions introduced into the ICR analyzer are constrained (trapped) by the magnetic field to move in circular orbits with a specific frequency that corresponds to a specific mass-to-charge ratio (m/z). Mass analysis occurs when radiofrequency (rf) potential is applied (pulsed) to the ICR analyzer so that all ions are accelerated to a larger orbit radius. After the pulse is turned off, the transient image current is acquired and a Fourier transform separates the individual cyclotron frequencies. Repeating this pulsing process to accumulate several transients is used to improve the signal-to-noise ratio. (Courtesy of Bruker Daltonics, Billerica, MA.)...

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