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MS: Fachverband Massenspektrometrie
MS 1: Precision Mass Spectrometry I
MS 1.7: Vortrag
Montag, 9. März 2020, 12:45–13:00, f128
Optimizations of the laser ablation ion source at the SHIPTRAP setup — •Brankica Andelić1,2, Michael Block2, 3, 4, Pierre Chauveau2, 3, Premaditya Chhetri2, 3, Julia Even1, Francesca Giacoppo2, 3, Nasser Kalantar- Nayestanaki1, Oliver Kaleja2, 3, 5, Sebastian Raeder2, 3, and Fabian Schneider2, 3 — 1University of Groningen — 2HI Mainz — 3GSI Darmstadt — 4JG University Mainz — 5MPIK Heidelberg
The SHIPTRAP mass spectrometer allows direct high-precision ion-mass measurements that reveal detailed information on the evolution of the nuclear shell structure of heavy exotic nuclei as well as the decay probability of nuclides relevant in stellar nucleosynthesis and neutrino physics. In addition to online experiments, mass measurements that involve the offline production of ions using a laser ablation ion source are being performed.
To study long-lived rare and radioactive isotopes we have to cope with small sample sizes. Therefore, an efficient ion production and injection into the double Penning-trap system as narrow bunches of few ions are crucial. A gas-filled miniature Radio-Frequency Quadrupole (mini-RFQ) was recently implemented into the SHIPTRAP ion source to thermalize the laser-ablated ions and thus improve the production efficiency as well as the sample preparation. In addition, the laser ablation ion source is important also for the online measurements since it provides reference ions of suitable mass-over-charge ratio for magnetic field calibration. In this contribution, the performance of the recently improved laser ablation ion source will be presented.