Erlangen 2018 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 2: Laser Assisted Mass Spectrometry

MS 2.4: Vortrag

Montag, 5. März 2018, 15:00–15:15, R 1.020

ISOLDE's Highly Selective Laser Ion Source LIST - Upgrades and Development — •Reinhard Heinke¹, Katerina Chrysalidis², Dominik Studer¹, Valentin Fedosseev², Tom Kieck¹, Bruce Marsh², Sebastian Raeder³, Sebastian Rothe², Marcel Trümper¹, and Klaus Wendt¹ — ¹Institut für Physik, JGU Mainz — ²EN Department, CERN — ³Helmholtz-Institut Mainz

Laser ion sources based on resonance ionization techniques today are well-established core techniques at all leading radioactive ion beam facilities worldwide. Ensuring both, highly efficient and element-selective ion beam production for on-line experiments on low-yield isotopes, these devices in addition allow for direct laser spectroscopic investigations on exotic nuclides. The Laser Ion Source and Trap (LIST) approach comprises preeminent suppression of contaminations from competing non-selective ionization mechanisms by spatially separating the hot atomization cavity from a clean laser - atom interaction volume, permitting access to nuclides previously inaccessible.

For this year's measurement campaign, a "next generation" LIST has been derived from operation experience and systematic studies: Revised repelling electrode and geometrical design yield further improvements in selectivity and efficiency.

On top, recent developments comprise a fast and robust cavity heating current switch to allow for both laser repetition rate synchronized heating and quick in-situ polarity switching to select between additional suppression and ion guiding operation.