Abstract
Collective acceleration of ions by a pinched relativistic electron beam was investigated. Two experimental methods were employed: probing the potential well held responsible for the ion acceleration with an externally generated ion beam probe, and time resolved magnetic spectrometer measurements of the collectively accelerated ions. The results obtained shed light on the temporal and spatial characteristics of the potential well and on the origin and energy spectra of the collectively accelerated ions. The properties and behavior of the potential well are described by a multiparameter model. The measurements indicate that the acceleration of ions is not caused by a moving well but probably by fast variations in its depth and position.
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