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A: Fachverband Atomphysik

A 35: Precision Spectroscopy of atoms and ions

A 35.14: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik

Low emittance laser ablation ion beam source — •Tim Lellinger¹, Tim Ratajczyk¹, Victor Varentsov^2,3, and Wilfried Nörtershäuser¹ — ¹Institut für Kernphysik, TU Darmstadt — ²Facility for Antiproton and Ion Research in Europe (FAIR GmbH) — ³Institute for Theoretical and Experimental Physics, Moscow, Russia

Laser ablation provides access to the production of a wide range of ion beams for various researches and applications. When the laser ablation occurs in a vacuum the high temperature and large angular divergence of the produced plasma plume do not allow the production of high quality ion beams. This can be avoided if the laser ablation is performed in the presence of a He buffer gas, where the ablated ions are stopped and cooled due to collisions with He atoms and then transported by the gas flow through a miniature nozzle into an RF-only funnel. After that the ions are effectively extracted into high vacuum conditions under a combined action of gas dynamic and electric fields. We present the design and first test measurements of such an ion beam source having two RF funnels. This ion source will be able to produce low emittance ion beams in both continuous and pulsed operation mode.