Hannover 2020 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 1: Precision Mass Spectrometry I
MS 1.6: Talk
Monday, March 9, 2020, 12:30–12:45, f128
Development of a Helium-3 source for the LIONTRAP experiment — •Sangeetha Sasidharan1, Sascha Rau1, Fabian Heisse1, Florian Köhler-Langes1, Wolfgang Quint2, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
High-precision mass measurements of light atomic nuclei enable sensitive tests of fundamental physics. An ultra-precise measurement of the mass difference of 3He and 3T [1] will provide an important input parameter for the determination of the electron anti-neutrino mass with the KATRIN experiment [2]. At the LIONTRAP Penning-trap experiment we have measured the atomic mass of the proton with a relative uncertainty of 3 × 10−11 [3]. With the deuteron mass being measured at present to even higher precision, the next step will be a measurement of the 3He mass. The LIONTRAP has a hermetically sealed trap chamber, which together with cryopumping results in a vacuum better than 10−16 mbar. However, this creates the necessity of an in-situ ion production method. Creating an in-situ 3He source is a challenge due to the weak bonding capability of helium. The method being investigated for this is the use of activated charcoal as an adsorption agent. In this talk the current status will be discussed.
[1] E.G. Myers et al. Phys. Rev. Lett. 114, 013003 (2015)
[2] M. Aker et al. Phys. Rev. Lett. 123, 221802 (2019)
[3] F. Heiße et al. Phys. Rev. A 100, 022518 (2019)