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MS: Fachverband Massenspektrometrie
MS 2: Precision Mass Spectrometry
MS 2.4: Talk
Monday, March 11, 2019, 15:00–15:15, U A-Esch 2
In-trap laser ablation in a Heidelberg compact EBIT for the production of highly charged ions of rare species — •Ch. Schweiger1, J. R. Crespo López-Urrutia1, M. Door1, Ch. E. Düllmann2, S. Eliseev1, P. Filianin1, W. Huang1, C. König1, 3, K. Kromer1, 3, D. Renisch2, A. Rischka1, R. X. Schüssler1, and K. Blaum1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg — 2Johannes Gutenberg-Universität Mainz, 55099 Mainz — 3Ruprecht-Karls-Universität Heidelberg, 69117 Heidelberg
The ECHo experiment [1] aims to determine the electron neutrino mass on the sub-eV level by a calorimetric measurement of the de-excitation spectrum of 163Dy following the electron capture process in 163Ho. As an independent consistency check the Q-value of this process will be measured as the mass difference of 163Ho and 163Dy with the high-precision Penning-trap mass spectrometer Pentatrap [2] with a relative mass uncertainty of 10−11. At this level of precision highly charged ions have to be used. These can be efficiently produced in electron beam ion traps (EBITs). Given an available 163Ho sample size of about 1014 atoms (≈ 27 ng), in-trap laser ablation is used for an efficient injection of 163Ho into the trapping volume of a Heidelberg compact EBIT [3]. In the talk the current status concerning setup and characterization as well as measurements of the target lifetime are presented.
[1] Gastaldo, L. et al., Eur. Phys. J. Special Topics 226, 1623 (2017)
[2] Repp, J. et al., Appl. Phys. B 107, 983 (2012)
[3] Micke, P. et al., Rev. Sci. Instrum. 89, 063109 (2018)