Speaker
Description
Precision laser spectroscopy is a powerful technique for investigating nuclear properties such as nuclear spins, electromagnetic moments, and changes in the mean-square radii in a way that is independent of a nuclear model [1]. Measurements using this technique are essential for testing and advancing nuclear theories. The Collinear Resonance Ionization Spectroscopy (CRIS) setup located at CERN is capable of performing such measurements across a wide range of isotopes on the nuclear chart. However, recent experiments have faced challenges due to isobaric beam contamination, which induced substantial background noise, preventing precise determination of the nuclear properties [2].
To resolve this issue for CRIS, a multi-reflection time-of-flight (MR-ToF) device [3] can be installed downstream of the ionization stage. The MR-ToF is an isobar separator proven to achieve high resolving powers (100k) in several tens of milliseconds, allowing efficient discrimination between the target isotope and background contaminants. A successful implementation of the MR-ToF at the CRIS beamline will significantly enhance the signal-to-noise ratio for future experimental campaigns at CRIS. Additionally, this integration will provide access to previously unmeasured isotopes whose signals were too weak to be distinct from the overwhelming background.
This contribution provides an overview of the ongoing project, focusing on the devolvement and testing of the newly commissioned offline MR-ToF beamline at KU Leuven. Preliminary results from tests demonstrating the feasibility of the MR-ToF system as an isobar separating device at the end of the CRIS setup will be discussed. Finally, the next steps and future developments will be outlined.
References:
[1] A. Koszor´us et al. Nuclear structure studies by collinear laser
spectroscopy. The European Physical Journal A, 60(1):20,
January 2024.
[2] R. Garcia et al. Laser Spectroscopy of exotic indium (Z = 49)
isotopes: Approaching the N =50 and N = 82 neutron numbers.
Technical report, CERN, Geneva, 2017.
[3] M. Schlaich et al. A multi-reflection time-of-flight mass
spectrometer for the offline ion source of the puma experiment.
International Journal of Mass Spectrometry, 495:117166, 2024.
| Email address | tobias.christen@kuleuven.be |
|---|---|
| Supervisor's Name | Agota Koszorus |
| Supervisor's email | agi.koszorus@kuleuven.be |
| Classification | Ion guide, gas catcher, and beam manipulation techniques |
