Heidelberg 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 48: Poster
HK 48.54: Poster
Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer
Detection system for forward emitted XUV photons from relativistic ion beams at the ESR — V. Hannen1, Th. Kühl2,3,4, W. Nörtershäuser2,3, H.-W. Ortjohann1, R. Sánchez3, Th. Stöhlker3,4,5, J. Vollbrecht1, Ch. Weinheimer1, D. Winters3, and •D. Winzen1 — 1Institut für Kernphysik, Uni Münster — 2Institut für Kernchemie, Uni Mainz — 3GSI, Darmstadt — 4Helmholtz Institut Jena — 5Uni Jena
Highly charged heavy ions stored at relativistic velocities provide a unique possibility to test atomic structure calculations. We would like to study effects of electron-electron correlations in Be-like krypton (84Kr32+) via a laser spectroscopy measurement of the 3P1−3P0 transition. For this purpose the krypton ions are stored at β≈0.69 in the Experimental Storage Ring (ESR). By interacting with counter-propagating laser pulses the laser frequency is Doppler shifted by more than one order of magnitude, thus being able to excite the krypton ions to the desired state. Additionally the large Doppler "boost" also shifts the fluorescence from λ0≈17 nm to λ≈9 nm and directs it into a narrow forward cone. To collect the light a movable cathode plate is brought into the vicinity of the beam. XUV photons hitting the plate produce mostly low energetic (<3 eV) secondary electrons. The electrons will be electromagnetically guided onto a MCP detector. The design and working principle, as well as results of first test measurements with the XUV detection system, will be presented. This work is supported by BMBF under contract number 05P12PMFAE. D. Winzen thanks HGS-HIRe for FAIR for funding his scholarship.