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We analyze possible motion control of microparticles by means of externalelectromagnetic fields which induce potential wells having fixed spatialdistribution but deepening over time up to some limit. It is assumed that givenparticles are under conditions of the high vacuum and forces acting on theseparticles are not dissipative. We have established slowdown of comparativelyfast particles as a result of their transit through considered potential wells.This process is demonstrated on example of the nonresonance laser beam with theintensity amplifying over time. More detailed research of particle slowdown insuch electromagnetic fields is carried out on the basis of simple analyticalrelationships obtained from basic equations of classical mechanics for themodel of the one-dimensional rectangular potential well deepening over time.Method for cooling of particles, demonstrated in the present work, may beapplied for essential increase of spectroscopy resolution of variousmicroparticles, including in definite cases also atoms and molecules in theground quantum state.

Slowdown of microparticles by an electromagnetic potential well deepening over time