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An experimental comparison is presented concerning secondary ion desorption from insulators by keV and MeV heavy ion and by pulsed laser light. Time of flight mass spectra obtained with these desorption probes turned out to show many similarities /1,2,3/ despite of the quite different energizing processes. Some corresponding data have been published already /1,2,3,4/. The aim of the present work is to measure absolute ion yields and to exhibit the virtually existing differences associated with the three desorption probes. This has an practical aspect, since the combination of the methods could inlarge their capabilities for mass spectrometry but it might also lead to a deeper understanding of the desorption mechanisms. The measurements were made with the same targets under the same experimental conditions whatever the desorption probes (keV, MeV, Laser)

MeV, keV AND PHOTON INDUCED DESORPTION TIME OF FLIGHT MASS SPECTROMETRY