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A: Fachverband Atomphysik
A 13: Highly Charged Ions and their Applications I
A 13.6: Vortrag
Mittwoch, 8. März 2023, 12:30–12:45, F107
Towards electron cooling in the HITRAP cooling trap — •Simon Rausch1,2, Max Horst1,2, Zoran Andelkovic3, Svetlana Fedotova3, Wolfgang Geithner3, Frank Herfurth3, Dennis Neidherr3, Wilfried Nörtershäuser1,2, Nils Stallkamp3,4, and Gleb Vorobyev3 — 1Institut für Kernphysik, TU Darmstadt, Schloßgartenstr. 9, Darmstadt — 2Helmholtz Akademie Hessen für FAIR HFHF, Campus Darmstadt, Darmstadt — 3GSI Helmholtzzentrum, Planckstr. 1, Darmstadt — 4Institut für Kernphysik, JWGU Frankfurt, Max-von-Laue-Str. 9, Frankfurt a. M.
The HITRAP project at the GSI Helmholtzzentrum für Schwerionenforschung is designed to decelerate and cool heavy, highly charged ions. After deceleration to 6 keV/nucleon, the ion cloud can be captured within a Penning-Malmberg trap and cooled using electron cooling. For this, electrons and ions are stored simultaneously in a nested-trap configuration to enable energy transfer between them.
We present the current status of the HITRAP cooling trap and the next steps towards achieving electron cooling. We were able to capture several 105 highly charged Ar-ions, delivered by an EBIT at 4 keV/q. Simultaneously, about 109 electrons can be stored in the trap. Although the ions visibly effect the electron plasma, no cooling was observed so far. It was possible to detect ion motions, dependencies of ion properties on the storage time and to observe the space charge induced by the electron cloud. The next steps will include implementing additional detection methods in order to demonstrate electron cooling.
Funding by BMBF under contract 05P21RDFA1 is acknowledged.