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

Autor(en)

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

Abstrakt

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(en)

Isotopenphysik

Externe Organisation(en)

Universität zu Köln

Journal

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

Band

528

Seiten

27-33

Anzahl der Seiten

7

ISSN

0168-583X

Publikationsdatum

10-2022

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics, Instrumentation

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cd279973-eeaf-4084-b837-bfe2247e4285