Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 21: Precision Spectroscopy IV - highly charged ions (joint session A/Q)
A 21.4: Talk
Tuesday, March 6, 2018, 15:00–15:15, K 1.016
Electron-gun development for electron-ion crossed-beams experiments — •B. Michel Döhring1, Alexander Borovik Jr.1, Benjamin Ebinger1, Kurt Huber1, Tobias Molkentin1, Alfred Müller2, and Stefan Schippers1 — 1I. Physikalisches Institut, Justus-Liebig-Universität Gießen — 2Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen
Reliable atomic data for electron impact ionisation of atoms are of crucial importance for the modelling of ionised-matter environments and other plasma related applications. To achieve a greater range of accessible electron energies and densities a new electron gun [1,2,3] that delivers a ribbon-shaped beam has been integrated into the experimental crossed-beams setup in Giessen. This gun is designed for electron energies from 10 to 3500 eV with high electron currents at all energies. Ten different electrodes provide a high degree of flexibility for choosing a number of operation modes. Here, we present the latest developments and the commissioning status of the high-power electron gun. In particular, we focus on the challenges associated with fast energy scan measurements.
[1] W. Shi et al., NIMB 205 (2003) 201-206.
[2] A. Borovik Jr. et al., J. Phys.: Conf. Ser. 488 (2014) 142007.
[3] B. Ebinger et al., NIMB 408 (2017) 317-322.