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MS: Fachverband Massenspektrometrie

MS 8: Precision Mass Spectrometry

MS 8.2: Vortrag

Donnerstag, 14. März 2019, 11:00–11:15, U A-Esch 2

Improved ion thermalization and preparation with the cryogenic buffer-gas stopping cell of SHIPTRAP — •Francesca Giacoppo^1,2, Brankica Andelić^1,3, Klaus Blaum⁴, Michael Block^1,2,5, Premaditya Chhetri⁶, Christian Droese⁷, Christoph E. Düllmann^1,2,5, Martin Eibach^2,7, Julia Even³, Stephan Götz^1,2,5, Nasser Kalantar-Nayestanaki³, Oliver Kaleja^2,4,5, Mustapha Laatiaoui^1,2,5, Andrew K. Mistry^1,2, Enrique Minaya Ramirez⁸, Tobias Murböck^1,2, Sebastian Raeder^1,2, Lutz Schweikhard⁷, and Peter G. Thirolf⁹ — ¹HIM Mainz — ²GSI Darmstadt — ³KVI-CART, RU Groningen — ⁴MPIK Heidelberg — ⁵JGU Mainz — ⁶TU Darmstadt — ⁷Univ. Greifswald — ⁸IPN Orsay — ⁹LMU München

During summer 2018 direct mass measurements of very heavy elements such as ²⁵¹No (Z=102), ²⁵⁴Lr (Z=103) as well as the first superheavy element ²⁵⁷Rf (Z=104) have been successfully achieved, for the first time, with the SHIPTRAP mass spectrometer. Such challenging experiments face the problem of very low production rates, down to few ions per hour(s) and demand a very efficient ion preparation and manipulation. In particular the ion thermalization after production and prior to transfer to the Penning traps is the most crucial step. The latter is achieved slowing down the ions into a buffer-gas stopping cell. In this talk the latest optimization of the recently implemented SHIPTRAP cryogenic buffer-gas stopping cell and its enhanced performance in term of efficiency and purity will be presented.