Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 32: Precision Spectroscopy IV - highly charged ions (joint session A/Q)

Q 32.4: Vortrag

Dienstag, 6. März 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.