Setup for multicoincidence experiments of photons in the extreme ultraviolet to visible spectral range and charged particles-The solid angle maximization approach

A Hans; C Ozga; Ph Schmidt; G Hartmann; A Nehls; Ph Wenzel; C Richter; C Lant; X Holzapfel; J H Viehmann; U Hergenhahn; A Ehresmann; A Knie

doi:10.1063/1.5109104

Setup for multicoincidence experiments of photons in the extreme ultraviolet to visible spectral range and charged particles-The solid angle maximization approach

Rev Sci Instrum. 2019 Sep;90(9):093104. doi: 10.1063/1.5109104.

Authors

A Hans¹, C Ozga¹, Ph Schmidt¹, G Hartmann¹, A Nehls¹, Ph Wenzel¹, C Richter², C Lant³, X Holzapfel¹, J H Viehmann¹, U Hergenhahn², A Ehresmann¹, A Knie¹

Affiliations

¹ Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
² Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, 04318 Leipzig, Germany.
³ Department of Physics, New York University, 726 Broadway, New York, New York 10003, USA.

PMID: 31575280
DOI: 10.1063/1.5109104

Abstract

The coincident detection of particles is a powerful method in experimental physics, enabling the investigation of a variety of projectile-target interactions. The vast majority of coincidence experiments is performed with charged particles, as they can be guided by electric or magnetic fields to yield large detection probabilities. When a neutral species or a photon is one of the particles recorded in coincidence, its detection probability typically suffers from small solid angles. Here, we present two optical assemblies considerably enhancing the solid angle for photon detection in the extreme ultraviolet to visible spectral range. The efficiency and versatility of these assemblies are demonstrated for electron-photon coincidence detection, where electrons and photons emerge from fundamental processes after photoexcitation of gaseous samples by synchrotron radiation.