Doppler and sympathetic cooling for the investigation of short-lived radioactive ions

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Fältnamn	Indikatorer	Metadata
000		03281naa a2200493 4500
001		oai:gup.ub.gu.se/322568
003		SwePub
008		240528s2022 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://gup.ub.gu.se/publication/3225682 URI
024	7	a https://doi.org/10.1103/PhysRevResearch.4.0332292 DOI
040		a (SwePub)gu
041		a eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Sels, S.4 aut
245	1 0	a Doppler and sympathetic cooling for the investigation of short-lived radioactive ions
264	1	c 2022
520		a At radioactive ion beam (RIB) facilities, ions of short-lived radionuclides are cooled and bunched in buffer-gas-filled Paul traps to improve the ion-beam quality for subsequent experiments. To deliver even colder ions, beneficial to RIB experiments' sensitivity or accuracy, we employ Doppler and sympathetic cooling in a Paul trap cooler-buncher. The improved emittance of Mg+, K+, and O2+ ion beams is demonstrated by a reduced time-of-flight spread of the extracted ion bunches with respect to room-temperature buffer-gas cooling. Cooling externally-produced hot ions with energies of at least 7 eV down to a few Kelvin is achieved in a timescale of O(100 ms) by combining a low-pressure helium background gas with laser cooling. This is sufficiently short to cool short-lived radioactive ions. As an example of this technique's use for RIB research, the mass-resolving power in a multireflection time-of-flight mass spectrometer is shown to increase by up to a factor of 4.6 with respect to buffer-gas cooling. Simulations show good agreement with the experimental results and guide further improvements and applications. These results open a path to a significant emittance improvement and, thus, unprecedented ion-beam qualities at RIB facilities, achievable with standard equipment readily available. The same method provides opportunities for future high-precision experiments with radioactive cold trapped ions.
650	7	a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
700	1	a Maier, F. M.4 aut
700	1	a Au, M.4 aut
700	1	a Fischer, P.4 aut
700	1	a Kanitz, C.4 aut
700	1	a Lagaki, V.4 aut
700	1	a Lechner, S.4 aut
700	1	a Leistenschneider, E.4 aut
700	1	a Leimbach, David,d 1992u Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)4 aut0 (Swepub:gu)xleida
700	1	a Lykiardopoulou, E. M.4 aut
700	1	a Kwiatkowski, A. A.4 aut
700	1	a Manovitz, T.4 aut
700	1	a Vila Gracia, Y. N.4 aut
700	1	a Neyens, G.4 aut
700	1	a Plattner, P.4 aut
700	1	a Rothe, S.4 aut
700	1	a Schweikhard, L.4 aut
700	1	a Vilen, M.4 aut
700	1	a Wolf, R. N.4 aut
700	1	a Malbrunot-Ettenauer, S.4 aut
710	2	a Göteborgs universitetb Institutionen för fysik (GU)4 org
773	0	t Physical Review Researchg 4:3q 4:3x 2643-1564
856	4 8	u https://gup.ub.gu.se/publication/322568
856	4 8	u https://doi.org/10.1103/PhysRevResearch.4.033229

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