Delayed extraction

, Middle: the red ion takes the lead since it has a greater velocity (and kinetic energy) but since it is farther from the acceleration plate at voltage +V, it gains less energy than the blue ion. Bottom: The blue ion has gained sufficient energy such that it arrives at the detector at the same time as the red ion. Delayed extraction is a method used with a time-of-flight mass spectrometer in which the accelerating voltage is applied after some short time delay following pulsed laser desorption/ionization from a flat surface of target plate or, in other implementation, pulsed electron ionization or Resonance enhanced multiphoton ionization in some narrow space between two plates of the ion extraction system. The extraction delay can produce time-of-flight compensation for ion energy spread and improve mass resolution.

, Middle: the red ion takes the lead since it has a greater velocity (and kinetic energy) but since it is farther from the acceleration plate at voltage +V, it gains less energy than the blue ion. Bottom: The blue ion has gained sufficient energy such that it arrives at the detector at the same time as the red ion.]] Delayed extraction is a method used with a time-of-flight mass spectrometer in which the accelerating voltage is applied after some short time delay following pulsed laser desorption/ionization from a flat surface of target plate or, in other implementation, pulsed electron ionization or Resonance enhanced multiphoton ionization in some narrow space between two plates of the ion extraction system. The extraction delay can produce time-of-flight compensation for ion energy spread and improve mass resolution. ==See also== Time of flight ==References==

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