Heidelberg 2015 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 2: Precision Mass Spectrometry 2
MS 2.7: Vortrag
Montag, 23. März 2015, 16:15–16:30, PH/HS2
PIPERADE: A large Penning trap isobar separator for the future low-energy facility DESIR of SPIRAL2 — •Antoine de Roubin1,2, Mehdi Aoudi2, Pauline Ascher2, Bertram Blank2, Klaus Blaum1, Pierre Dupré3, Mathias Gerbaux2, Stéphane Grévy2, Hugo Guérin2, David Lunney3, and Enrique Minaya Ramirez1 — 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 using beta decay spectroscopy, laser spectroscopy and trap-based experiments. For most of them, a high precision is needed and can be reached only if highly pure samples of exotic nuclei are available. Some particular physics cases will be presented.
In addition of the HRS, located upstream, PIPERADE will be a system placed at the DESIR hall entrance to purify the radioactive ion beam from undesired contaminants. It will consist of an RFQ for bunching and cooling and of a double Penning trap 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 separate very large amounts of short-lived nuclei (< 105 ions per bunch) while maintaining the resolving power necessary for isobar selection of 105. For this purpose, research about space charge effects and new excitation schemes are ongoing and will be presented.