Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method

Florian Greiner; Timo Dickel; Samuel Ayet San Andrés; Julian Bergmann; Paul Constantin; Jens Ebert; Hans Geissel; Emma Haettner; Christine Hornung; Ivan Miskun; Wayne Lippert; Israel Mardor; Iain Moore; Wolfgang R. Plaß; Sivaji Purushothaman; Ann Kathrin Rink; Moritz P. Reiter; Christoph Scheidenberger; Helmut Weick

doi:10.1016/j.nimb.2019.04.072

Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method

Florian Greiner, Timo Dickel^*, Samuel Ayet San Andrés, Julian Bergmann, Paul Constantin, Jens Ebert, Hans Geissel, Emma Haettner, Christine Hornung, Ivan Miskun, Wayne Lippert, Israel Mardor, Iain Moore, Wolfgang R. Plaß, Sivaji Purushothaman, Ann Kathrin Rink, Moritz P. Reiter, Christoph Scheidenberger, Helmut Weick

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 beamline. A reduction of molecular contamination by more than 4 orders of magnitude was achieved.

Original language	English
Pages (from-to)	324-326
Number of pages	3
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	463
DOIs	https://doi.org/10.1016/j.nimb.2019.04.072
State	Published - 15 Jan 2020

Keywords

Beam purification
Collision-induced dissociation
Low-energy RIB
Molecular contamination
RF-quadrupole

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10.1016/j.nimb.2019.04.072

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Greiner, F., Dickel, T., Ayet San Andrés, S., Bergmann, J., Constantin, P., Ebert, J., Geissel, H., Haettner, E., Hornung, C., Miskun, I., Lippert, W., Mardor, I., Moore, I., Plaß, W. R., Purushothaman, S., Rink, A. K., Reiter, M. P., 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

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title = "Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method",

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 beamline. A reduction of molecular contamination by more than 4 orders of magnitude was achieved.",

keywords = "Beam purification, Collision-induced dissociation, Low-energy RIB, Molecular contamination, RF-quadrupole",

author = "Florian Greiner and Timo Dickel and {Ayet San Andr{\'e}s}, Samuel and Julian Bergmann and Paul Constantin and Jens Ebert and Hans Geissel and Emma Haettner and Christine Hornung and Ivan Miskun and Wayne Lippert and Israel Mardor and Iain Moore and Pla{\ss}, {Wolfgang R.} and Sivaji Purushothaman and Rink, {Ann Kathrin} and Reiter, {Moritz P.} and Christoph Scheidenberger and Helmut Weick",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2020",

month = jan,

day = "15",

doi = "10.1016/j.nimb.2019.04.072",

language = "אנגלית",

volume = "463",

pages = "324--326",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier",

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Greiner, F, Dickel, T, Ayet San Andrés, S, Bergmann, J, Constantin, P, Ebert, J, Geissel, H, Haettner, E, Hornung, C, Miskun, I, Lippert, W, Mardor, I, Moore, I, Plaß, WR, Purushothaman, S, Rink, AK, Reiter, MP, 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, vol. 463, pp. 324-326. https://doi.org/10.1016/j.nimb.2019.04.072

Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method. / Greiner, Florian; Dickel, Timo; Ayet San Andrés, Samuel et al.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 463, 15.01.2020, p. 324-326.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method

AU - Greiner, Florian

AU - Dickel, Timo

AU - Ayet San Andrés, Samuel

AU - Bergmann, Julian

AU - Constantin, Paul

AU - Ebert, Jens

AU - Geissel, Hans

AU - Haettner, Emma

AU - Hornung, Christine

AU - Miskun, Ivan

AU - Lippert, Wayne

AU - Mardor, Israel

AU - Moore, Iain

AU - Plaß, Wolfgang R.

AU - Purushothaman, Sivaji

AU - Rink, Ann Kathrin

AU - Reiter, Moritz P.

AU - Scheidenberger, Christoph

AU - Weick, Helmut

PY - 2020/1/15

Y1 - 2020/1/15

N2 - 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 beamline. A reduction of molecular contamination by more than 4 orders of magnitude was achieved.

AB - 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 beamline. A reduction of molecular contamination by more than 4 orders of magnitude was achieved.

KW - Beam purification

KW - Collision-induced dissociation

KW - Low-energy RIB

KW - Molecular contamination

KW - RF-quadrupole

UR - http://www.scopus.com/inward/record.url?scp=85065250305&partnerID=8YFLogxK

U2 - 10.1016/j.nimb.2019.04.072

DO - 10.1016/j.nimb.2019.04.072

M3 - מאמר

AN - SCOPUS:85065250305

VL - 463

SP - 324

EP - 326

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

SN - 0168-583X

ER -

Removal of molecular contamination in low-energy RIBs by the isolation-dissociation-isolation method

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Keywords

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