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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.49: Poster

Donnerstag, 21. März 2019, 16:30–19:00, Foyer Theresanium

¹²C³⁺ fine structure transitions measured with a detection system for forward emitted XUV photons at the ESR — •Daniel Winzen¹, Michael Bussmann², Axel Buß¹, Christian Egelkamp¹, Lewin Eidam³, Volker Hannen¹, Zhongkui Huang⁴, Daniel Kiefer³, Sebastian Klammes³, Thomas Kühl^5,6,7, Markus Loeser², Xinwen Ma⁴, Wilfried Nörtershäuser³, Hans-Werner Ortjohann¹, Rodolfo Sánchez^3,5, Mathias Siebold², Thomas Stöhlker^5,6,8, Johannes Ullmann^3,6,8, Jonas Vollbrecht¹, Thomas Walther³, Hanbing Wang⁴, Christian Weinheimer¹, and Danyal Winters⁵ — ¹WWU Münster — ²HZDR Dresden — ³TU Darmstadt — ⁴IMP Lanzhou — ⁵GSI Darmstadt — ⁶HI Jena — ⁷JGU Mainz — ⁸FSU Jena

The Institut für Kernphysik in Münster developed an XUV-photon detection system for laser spectroscopy measurements at the ESR (GSI/FAIR). In a test beam time for laser cooling with ¹²C³⁺-ions at β≈0.47, the ²S_1/2−²P_1/2 and the ²S_1/2−²P_3/2 transitions were investigated to commission the system. The detector features a movable cathode plate which is brought into the vicinity of the beam to collect forward emitted Doppler shifted photons (λ_lab≈93 nm). These photons produce mostly low energetic (<3 eV) secondary electrons which are electromagnetically guided onto an MCP detector. The working principle of the detector as well as the results of the beam time will be presented. This work is supported by BMBF under contract number 05P15PMFAA. D. Winzen thanks HGS-Hire for FAIR for funding his scholarship.