Magnetic field-enhanced beam monitor for ionizing radiation

Bart Platier (Corresponding author), R. Limpens, A. Lassise, T.J.J. Oosterholt, Mark van Ninhuijs, K.A. Daamen, Tim J.A. Staps, Marco Zangrando, O.J. Luiten, Wilbert L. IJzerman, Job Beckers

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Abstract

For the microwave cavity resonance spectroscopy based non-destructive beam monitor for ionizing radiation, an addition—which adapts the approach to conditions where only little ionization takes place due to, e.g., small ionization cross sections, low gas pressures, and low photon fluxes—is presented and demonstrated. In this experiment, a magnetic field with a strength of 57 ± 1 mT was used to extend the lifetime of the afterglow of an extreme ultraviolet-induced plasma by a factor of ∼5. Magnetic trapping is expected to be most successful in preventing the decay of ephemeral free electrons created by low-energy photons. Good agreement has been found between the experimental results and the decay rates calculated based on the ambipolar and classical collision diffusion models.
Original languageEnglish
Article number063503
Number of pages6
JournalReview of Scientific Instruments
Volume91
Issue number6
DOIs
Publication statusPublished - 9 Jun 2020

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