Abstract
A gas-filled miniature Radio-Frequency Quadrupole (mini-RFQ) was recently implemented into the SHIPTRAP laser ablation ion source to thermalize the laser-ablated ions and thus improve production efficiency as well as sample preparation. This source provides reference ions of various elements for online experiments with the SHIPTRAP mass spectrometer. In addition, it can be used to provide long-lived rare and radioactive isotopes available only in small sample sizes for high-precision mass measurements or to study systematic uncertainties. The performance of the laser ablation ion source was simulated using the COMSOL Multiphysics modeling software package. These studies indicate that a revised mechanical geometry and an optimized RF field improve the performance significantly.
Highlights
In several areas of physics, high-precision measurements of atomic masses and mass differences, so called Q-values, are required
Aside from the experiments investigating heavy and super-heavy elements [3, 4], the physics program of SHIPTRAP comprises the very neutron-deficient nuclides below tin [5, 6] as well as high-precision measurements of Q-values contributing to neutrino physics [7]
Simulation studies of the existing setup have been presented. They indicate that ion bunch production can be improved with a different configuration of the target plate, closer to the mini-radio-frequency quadrupole (RFQ) injection electrode
Summary
In several areas of physics, high-precision measurements of atomic masses and mass differences, so called Q-values, are required. Penning-trap mass spectrometry (PTMS) is the most precise and accurate method for mass measurements of stable and short-lived. This article is part of the Topical Collection on Proceedings of PLATAN 2019, 1st International Conference, Merger of the Poznan Meeting on Lasers and Trapping Devices in Atomic Nuclei Research and the International Conference on Laser Probing, Mainz, Germany 19-24 May 2019 Edited by Krassimira Marinova, Michael Block, Klaus D.A. Wendt and Magdalena Kowalska
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