Conference paper
Authors list: Greiner, Florian; Dickel, Timo; San Andres, Samuel Ayet; Bergmann, Julian; Constantin, Paul; Ebert, Jens; Geissel, Hans; Haettner, Emma; Hornung, Christine; Miskun, Ivan; Lippert, Wayne; Mardor, Israel; Moore, Lain; Plass, Wolfgang R.; Purushothaman, Sivaji; Rink, Ann-Kathrin; Reiter, Moritz P.; Scheidenberger, Christoph; Weick, Helmut
Publication year: 2020
Pages: 324-326
Journal: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume number: 463
ISSN: 0168-583X
eISSN: 1872-9584
Open access status: Hybrid
DOI Link: https://doi.org/10.1016/j.nimb.2019.04.072
Conference: 18th International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS)
Publisher: Elsevier
Abstract:
Experiments with low-energy rare ion beams often suffer from a large amount of molecular contaminant ions. We present the simple isolation-dissociation-isolation method to suppress this kind of contamination. The method can be applied to almost all types of low-energy beamlines. In a first step, a coarse isolation of the mass-to-charge ratio of interest is performed, e.g. by a dipole magnet. In a second step, the ions are dissociated. The last step is again a coarse isolation of the mass-to-charge ratio around the ion of interest. The method was tested at the FRS Ion Catcher at GSI with a radioactive ion source installed inside the cryogenic stopping cell as well as with relativistic ions delivered by the synchrotron SIS-18 and stopped in the cryogenic stopping cell. The isolation and dissociation, here collision-induced dissociation, have been implemented in a gas-filled RFQ beam-line. A reduction of molecular contamination by more than 4 orders of magnitude was achieved.
Citation Styles
Harvard Citation style: Greiner, F., Dickel, T., San Andres, S., Bergmann, J., Constantin, P., Ebert, J., et al. (2020) Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method, Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 463, pp. 324-326. https://doi.org/10.1016/j.nimb.2019.04.072
APA Citation style: Greiner, F., Dickel, T., San Andres, S., Bergmann, J., Constantin, P., Ebert, J., Geissel, H., Haettner, E., Hornung, C., Miskun, I., Lippert, W., Mardor, I., Moore, L., Plass, W., Purushothaman, S., Rink, A., Reiter, M., Scheidenberger, C., & Weick, H. (2020). Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method. Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 463, 324-326. https://doi.org/10.1016/j.nimb.2019.04.072
Keywords
Beam purification; BEAMS; COLLISION-INDUCED DISSOCIATION; FRS; Low-energy RIB; Molecular contamination; RF-quadrupole
