Design of a Lamb-Shift Polarimeter for 3He Ions and Atoms
N. Faatz, R. Engels, C. Kannis, S. J. Pütz, J. Steinhage
Abstract
In high energy physics experiments 3He2+ nucleons are suitable to test the internal structure of neutrons, which makes them the perfect substitute. Moreover, it is one of the atomic species for which high polarization values are achievable through the use of optical pumping methods. Therefore, nuclear polarized sources for 3He2+ ions are currently under development. Consequently, detector systems validating their nuclear polarization value need to be established. Such a detector system, based on the Lamb-shift polarimeter, is introduced in this work. Its advantage is that it can operate at low energies in the range of 10 to 100 keV, which makes pre-acceleration unnecessary. In addition, a fast evaluation of the nuclear polarization within seconds leads to shorter disruptions for beam times. Another option of this Lamb-shift polarimeter might be that it can serve as a valuable tool for further investigation of the bound tritium decay into 3He atoms, similar to the hydrogen spin filter for the bound beta decay of the free neutron.
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