Abstract
A compact radio frequency cooler buncher (RFQCB) is currently in development between The University of Manchester, KU Leuven, and CERN. The device will be installed as part of the Collinear Resonance Ionisation Spectroscopy (CRIS) experiment at the Isotope separator On-line device (ISOLDE) at CERN. The purpose of developing a dedicated RFQCB for the CRIS experiment is to increase data collection efficiency, and simplify the process of obtaining reference measurements with stable isotopes. The CRIS technique is outlined in addition to an overview of the proposed RFQCB, and its potential compatibility for implementation at ISOLDE.
Highlights
The Collinear Resonance Ionisation Spectroscopy (CRIS) technique [1] has been shown to be a sensitive method for measuring nuclear observables of exotic isotopes [2,3,4,5]
The design philosophy follows that of ISCOOL [7], except in this case the planar electrodes are copper pads which sit on printed circuit boards (PCBs) and run along the length of the trapping region
The design and prototyping phase of a new, and dedicated radio frequency cooler buncher (RFQCB) for CRIS experiments is in progress
Summary
The CRIS technique [1] has been shown to be a sensitive method for measuring nuclear observables of exotic isotopes [2,3,4,5]. Another advantage of an independent RFQCB would be the ability to perform long studies for the purpose of assessing systematic errors throughout the full experimental setup, which is essential for the study of light elements Such cases require very precise isotope shift measurements to extract the changes in mean-square charge radii. It would simplify the process of switching from a radioactive beam to a stable reference isotope since the CRIS ablation ion source [8] could be utilised instead of cycling the magnets of the high resolution separator (HRS) These reference measurements are essential to monitor drifts, assess systematic errors, extract nuclear observables, and must be carried out many times during an experiment. During this period the device will be installed and optimised using the CRIS ablation ion source such that it is ready to accept beam from ISOLDE, when the system is returned to a fully operational state in 2021
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