The establishment of EVISA is funded by the EU through
the Fifth Framework Programme (G7RT- CT- 2002- 05112).
Supporters of EVISA includes:
Postsource decay (PSD) processes are ion dissociations that occur within the drift region of a time-of-flight mass analyzer. After initial ion formation and acceleration out of the sourc into the flight tube, ions may dissociate or neutralize. In a linear time-of-flight instrument, these fragment ions and neutral species reach the detector at the same time as the precursor ions from which they are formed. However, these reactions can be specifically studied by using a reflectron (adjusting the ratio of accelerating to reflectron voltages in a stepwise manner) to bring fragment ions formed in post- source decay processes into focus at the detector.