A1 Journal article (refereed)
Miniaturised cooler-buncher for reduction of longitudinal emittance at IGISOL (2025)


Virtanen, V.A., Eronen, T., Kankainen, A., Beliuskina, O., Campbell, P., Delaplanche, R., Ge, Z., de Groote, R.P., Hukkanen, M., Jaries, A., Kronholm, R., Moore, I.D., Raggio, A., Roubin A. de, Ruotsalainen, J., Schuh, M. (2025). Miniaturised cooler-buncher for reduction of longitudinal emittance at IGISOL. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1072, Article 170186. https://doi.org/10.1016/j.nima.2024.170186


JYU authors or editors


Publication details

All authors or editorsVirtanen, V.A.; Eronen, T.; Kankainen, A.; Beliuskina, O.; Campbell, P.; Delaplanche, R.; Ge, Z.; de Groote, R.P.; Hukkanen, M.; Jaries, A.; et al.

Journal or seriesNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ISSN0168-9002

eISSN1872-9576

Publication year2025

Publication date07/01/2025

Volume1072

Article number170186

PublisherElsevier

Publication countryNetherlands

Publication languageEnglish

DOIhttps://doi.org/10.1016/j.nima.2024.170186

Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/99522


Abstract

A new linear Paul trap section has been constructed to replace the existing bunching section of the radiofrequency quadrupole (RFQ) cooler-buncher at the IGISOL radioactive ion beam facility. The cooler-buncher is used to transform a continuous ion beam to temporally short bursts of ions. The new miniaturised cooler-buncher section produces significantly shorter bunches in time, required by the new Multi-Reflection Time-of-Flight Mass Spectrometer. In this article, we report on the longitudinal properties of the ion bunches and compare the results to an analytical model derived for axial distributions of ions confined in a harmonic trap at thermodynamical equilibrium with a heat bath. The new buncher configuration delivers < 75 ns full-width at half-maximum bunches with a longitudinal emittance of 200 eVns. The bunches have a full-width at half-maximum energy spread of 10 eV. Total transmission efficiency of 45%–65% has been measured from the isotope separator focal plane through the RFQ cooler-buncher, Multi-Reflection Time-of-Flight Mass Spectrometer and JYFLTRAP double Penning trap.


Keywordsmass spectrometryparticle acceleratorsparticle physics

Free keywordsIGISOL; RFQ cooler-buncher; longitudinal emittance


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Ministry reportingYes

VIRTA submission year2025

Preliminary JUFO rating1


Last updated on 2025-08-02 at 20:05