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Intrinsic energy losses of field-evaporated ions

A R Waugh and M J Southon

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The construction of a parallel-plate electrostatic energy-analyser equipped with a channel-plate focal-plane detector and a novel acceleration electrode assembly has allowed the intrinsic energy losses of field-evaporated ions to be measured for the first time, under effectively steady-state conditions. It is found that the ions have energy losses which are considerably less than originally predicted by the Lucas plasmon-loss theory (1971); the losses are shown to be of the same order as those expected from the charge-exchange or image-potential theories of field evaporation, but exact numerical agreement is not easily attained at present.


PACS

79.70.+q Field emission, ionization, evaporation, and desorption

61.85.+p Channeling phenomena (blocking, energy loss, etc.)

Subjects

Condensed matter: electrical, magnetic and optical

Condensed matter: structural, mechanical & thermal

Dates

Issue 6 (21 April 1976)



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