Mainz 2017 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 2: Precision Mass Spectrometry and Fundamental Applications II
MS 2.3: Vortrag
Montag, 6. März 2017, 17:45–18:00, RW 2
Production of Highly Charged Ho-163 Ions in a Room Temperature Electron Beam Ion Trap — •Christoph Schweiger1, Rima X. Schüssler1, Alexander Rischka1, Peter Micke1, 2, José R. Crespo López-Urrutia1, Pavel Filianin1, Sergey Eliseev1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg — 2QUEST Institute for Experimental Quantum Metrology, 38116 Braunschweig
The ECHo experiment [1] aims to determine an upper limit of the electron neutrino mass in the sub-eV range by a calorimetric measurement of the de-excitation spectrum of Dy-163 following the electron capture process in Ho-163. As a consistency check the Q-value of this process will be measured as the mass difference of Ho-163 and Dy-163 with the high-precision Penning-trap mass spectrometer PENTATRAP [2] aiming for a relative mass uncertainty of 10−11. At this level of precision highly charged ions have to be used and an efficient way for their production is the use of an electron beam ion trap (EBIT). Given an available Ho-163 sample size of less than 1013 atoms, the wire probe technique [3] will be applied for their precise injection into the trapping volume of a compact room temperature EBIT. In the talk the current status concerning setup, characterisation and measurements of the EBIT and the wire probe will be presented.
[1] Gastaldo, L. et al.. J. Low Temp. Phys. 176, 876 (2014)
[2] Repp, J. et al., Appl. Phys. B 107, 983 (2012)
[3] Elliott, S.R. et al., Nucl. Instr. and Meth. B 100, 523 (1995)