The Collinear Fast Beam laser Spectroscopy (Cfbs) experiment at Triumf

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 811; pp. 57 - 69
• Main Authors: Voss, A., Procter, T.J., Shelbaya, O., Amaudruz, P., Buchinger, F., Crawford, J.E., Daviel, S., Mané, E., Pearson, M.R., Tamimi, W. Al
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2016
• Subjects: Acceleration; Collinear laser spectroscopy; Detectors; Electric potential; High-frequency intensity modulation; Laser beams; Laser spectroscopy; Multi-dimensional data acquisition system; Nuclei; Rapid frequency switching; Spectrometers; Three dimensional; Time-resolved fluorescence spectroscopy; Collinear laser spectroscopy; Rapid frequency switching; Time-resolved fluorescence spectroscopy; Multi-dimensional data acquisition system; High-frequency intensity modulation
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2015.11.145

Laser spectroscopy experiments at radioactive ion beam facilities around the world investigate properties of exotic nuclei for scientific endeavours such as, but not limited to, the investigation of nuclear structure. Advancements in experimental sensitivity and performance are continuously needed in order to extend the reach of nuclei that can be measured. The collinear fast beam laser spectroscopy (Cfbs) setup at Triumf, coupled to an out-of-plane radio-frequency quadrupole Paul trap, enables measurements of some of the most fundamental nuclear properties for long-lived ground and isomeric states. The first comprehensive overview of the Cfbs experiment is provided along with descriptions of key developments that extend the reach of laser spectroscopy experiments. A novel data acquisition technique structured around three-dimensional spectra is presented, where the integration of a custom multi-channel-scalar provides photon counts correlated with arrival time and acceleration voltage for post-experiment analysis. In addition, new rapid light manipulation techniques are discussed that suppress undesirable hyperfine pumping effects and regain losses in experimental efficiency.