A scanning drift tube apparatus for spatiotemporal mapping of electron swarms

I. Korolov, M. Vass, N. Kh Bastykova, Z. Donkó

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Abstract

A "scanning" drift tube apparatus, capable of mapping of the spatiotemporal evolution of electron swarms, developing between two plane electrodes under the effect of a homogeneous electric field, is presented. The electron swarms are initiated by photoelectron pulses and the temporal distributions of the electron flux are recorded while the electrode gap length (at a fixed electric field strength) is varied. Operation of the system is tested and verified with argon gas; the measured data are used for the evaluation of the electron bulk drift velocity. The experimental results for the space-time maps of the electron swarms - presented here for the first time - also allow clear observation of deviations from hydrodynamic transport. The swarm maps are also reproduced by particle simulations.

Original languageEnglish
Article number063102
JournalReview of Scientific Instruments
Volume87
Issue number6
DOIs
Publication statusPublished - Jun 1 2016

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ASJC Scopus subject areas

  • Instrumentation

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