An advanced radio-frequency quadrupole ion cooler for accelerator mass spectrometry

Author(s)

M. Schiffer, O. Machhart, A. Priller, S. Herb, G. Hackenberg, S. Heinze, M. Martschini, E. Strub, T. Dunai, R. Golser, A. Dewald

Abstract

An advanced radio-frequency quadrupole (RFQ) ion cooler was developed for accelerator mass spectrometry to use element-selective laser photodetachment and ion-molecule reactions for isobar suppression. The system will be installed as a central part of the new Anion Laser Isobar Separator (ALIS) at the 6 MV AMS system of CologneAMS. The new RFQ design intends to solve the technical challenge of the deceleration and trapping of heavy molecular ion beams with high emittance. Therefore, an elliptical injection electrode was developed to slow down the ions far away from the central entrance aperture. A new and easy-to-manufacture guide-field assembly was developed. For this purpose, diagonally-split cylindrical surface electrodes are capacitively coupled to a core rod that is carrying the RF signal. Consequently, only low DC voltages are needed to create a gradually changing potential in the longitudinal direction. The RFQ and the acceleration electrodes are installed in a self-aligned structure.

Organisation(s)

Isotope Physics

External organisation(s)

Universität zu Köln

Journal

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

Volume

528

Pages

27-33

No. of pages

7

ISSN

0168-583X

Publication date

10-2022

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

Keywords

ASJC Scopus subject areas

Nuclear and High Energy Physics, Instrumentation

Portal url

https://ucris.univie.ac.at/portal/en/publications/an-advanced-radiofrequency-quadrupole-ion-cooler-for-accelerator-mass-spectrometry(cd279973-eeaf-4084-b837-bfe2247e4285).html