Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 58: Instrumentierung
HK 58.6: Vortrag
Freitag, 21. März 2014, 12:15–12:30, HZ 10
PIPERADE: A Penning trap based isobar separator for the future low-energy facility DESIR of SPIRAL2 — •A. de Roubin1,2, P. Ascher1, B. Blank2, K. Blaum1, P. Dupré3, M. Gerbaux2, S. Grévy2, H. Guérin2, D. Lunney3, and S. Naimi1 — 1MPIK, Heidelberg, Germany — 2CENBG, Gradignan, France — 3CSNSM, Orsay, France
Exotic nuclei currently not accessible will be delivered to the future DESIR facility for nuclear structure and astrophysics studies as well as for testing the Standard Model, using beta decay spectroscopy, laser spectroscopy and trap-based experiments. For most of the experiments, a high precision is needed and can be reached only if highly pure samples of exotic nuclei are delivered. Some particular physics cases will be presented.
PIPERADE will be a system placed upstream the DESIR hall to purify the radioactive ion beam from undesired contaminants. It will consist of a radio-frequency quadrupole to bunch and cool the beam and of a double Penning-trap system to separate the isobaric species and accumulate the ions of interest. The purified beam will then be sent to the various experiments of the low-energy DESIR facility.
The challenge for the present double Penning-trap system consists of being able to accumulate very large amounts of short-lived nuclei (105−106) while maintaining the resolving power necessary for isobar selection of at least 105. For this purpose, studies of space charge effects and new excitation schemes are under investigation and will be presented.