München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.29: Poster

Donnerstag, 21. März 2019, 16:30–19:00, Foyer Theresanium

Field Emission Electron Source and Diagnostics for the PUMA Ion Trap — •Jonas Fischer, Noritsugu Nakatsuka, and Alexandre Obertelli — TU Darmstadt, Darmstadt, Germany

The goal of the PUMA (antiProton Unstable Matter Annihilation) experiment is to investigate the density distribution of short-lived nuclei. This is to be achieved by the annihilation of antiprotons, after capture, with the outermost part of the nucleus’ density distribution. To make this measurement possible one has to transport antiprotons to a radioactive ion beam facility. PUMA will be placed at the ELENA and ISOLDE facilities at CERN. For the storage of the p and the collision with the nuclei a cryogenic Penning trap is being built. Approximately one billion antiprotons will be stored in the trap and cooled by sympathetic electron cooling. In this work the design of a cryogenic field emission electron gun is detailed. Also the development of destructive and non-destructive diagnostics for antiproton cloud shape, charge and position is described.