Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 6: Atomic Systems in External Fields I
A 6.2: Talk
Monday, March 11, 2024, 17:15–17:30, HS 1098
A universal method to polarize beams and samples — •Nicolas Faatz1,2,3, Tarek El-Kordy1,2,4, Christoph Hanhart2,5, Chrysovalantis Kannis6, Lukas Kunkel1,2,3, Simon Pütz1,2, Harsh Sharma1,2,4, Vincent Verhoeven1,2, Jan Wirtz1,2,3, and Markus Büscher6,7 — 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 2Institut für Kernphysik, Forschungszentrum Jülich, Jülich, Germany — 3III. Physikalisches Institut B, RWTH Aachen University, Aachen, Germany — 4FH Aachen, Campus Jülich, Jülich, Germany — 5Institute for Advanced Simulation 4, Forschungszentrum Jülich, Jülich, Germany — 6Institut für Laser- und Plasma-Physik, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany — 7Peter-Grünberg-Institut 6, Forschungszentrum Jülich, Jülich, Germany
In various applications a high nuclear polarisation, ideally a total alignment of all spins, is favourable, e.g. for sources and targets for fundamental research. The hereby presented method provides an inexpensive, fast, versatile and effective solution to produce highly polarised materials in reasonable amounts based on radio-wave pumping of hyperfine states and quantum interference effects. This method is theoretically understood and was experimentally proven for beams of metastable hydrogen atoms in the keV energy range. Thus, this technique opens the door for new applications as polarised tracers or even low-field MRI with even better spatial resolution in medicine or the production of polarised fuel to increase the energy output.
Keywords: polarisation; beam; sample; magnetic fields; hyperfine