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HK: Fachverband Hadronen und Kerne

HK 51: Fundamental Symmetries

HK 51.2: Talk

Wednesday, March 18, 2009, 14:30–14:45, H-ZO 70

Anti-hydrogen Experiments at ATRAP — •Dieter Grzonka, Matthew George, Walter Oelert, Thomas Sefzick, and Marcin Zielinski — Forschungszentrum Jülich, IKP, 52425 Jülich, Germany

The ATRAP experiment at the anti-proton decelerator of CERN aims for a precise test of CPT invariance by comparative spectroscopic studies of hydrogen and anti-hydrogen atoms. The trapping of neutral anti-hydrogen atoms is the prerequisite to achieve the required precision in these studies.

Anti-hydrogen is produced in a nested Penning-trap for positrons and anti-protons which is located within a magnetic gradient field for the trapping of anti-hydrogen. Since the trap depth is less than 1K, cold anti-hydrogen has to be produced in its ground state for a high trapping efficiency. With an improved apparatus - including a 1 K pot and an additional solenoid - anti-hydrogen production techniques are studied presently, which should result in low temperature anti-hydrogen.

The status of the experiment and further steps towards the precision spectroscopy will be outlined.

Supported in part by DFG and FZ-Jülich