16-21 September 2018
CERN
Europe/Zurich timezone

An RFQ Cooler-Buncher for the $N=126$ factory at Argonne National Laboratory

18 Sep 2018, 16:45
2h
500/1-201 - Mezzanine (CERN)

500/1-201 - Mezzanine

CERN

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Poster Ion guide, gas catcher, and beam manipulation techniques Poster Session 2

Speaker

Mr Adrian Valverde (University of Notre Dame)

Description

The properties of nuclei near the neutron $N=126$ shell, in particular their atomic masses, are critical to the understanding of the production of elements via the astrophysical r-process pathway [1]. Unfortunately, such nuclei cannot be produced in sufficient quantities using common particle-fragmentation, target-fragmentation, or fission production techniques. However, multi-nucleon transfer reactions between two heavy ions provide a method to access and study these nuclei [2]. The $N=126$ factory currently under construction at Argonne National Laboratory's ATLAS facility will make use of these reactions to allow for the study of these nuclei through, for example, high-precision mass measurements through Penning trap mass spectrometry. This new facility will include a large-volume gas catcher to stop reaction products, followed by a mass analyzing magnet of resolution $R\sim10^3$ to provide initial separation, a radio frequency quadrupole (RFQ) buncher to cool and accumulate the beam and injection into a multi-reflection time-of-flight mass spectrometer (MR-ToF) to provide high mass resolution ($R\sim10^5$) and suppress isobaric contaminants. The construction and commissioning of the RFQ buncher, based on the design used at the National Superconducting Cyclotron Laboratory's BECOLA [3] and EBIT cooler-bunchers, will be presented.

[1] M.R. Mumpower et al., Prog. Part. Nucl. Phys., 86, 86 (2016)
[2] V. Zagrebaev and W. Greiner, Phys. Rev. Lett., 101, 122791 (2008)
[3] B.R. Barquest et al., Nucl. Instrum. Methods A, 866, 18 (2017)

Primary author

Mr Adrian Valverde (University of Notre Dame)

Co-authors

Prof. Maxime Brodeur (University of Notre Dame) Dr Jason Clark (Argonne National Laboratory) Dr Daniel Lascar (Argonne National Laboratory) Prof. Guy Savard (Argonne National Laborator/University of Chicago)

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