Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 925, Issue -, Pages 24-32Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2019.01.082
Keywords
Beamline; Laser polarization; beta-asymmetry; Adiabatic rotation
Categories
Funding
- ERC [640465]
- FWO-Vlaanderen (Belgium)
- KU Leuven [GOA 15/010]
- Science and Technology Facilities Council (UK)
- European Union's Horizon 2020 research and innovation programme [654002]
- Ministry of Education of Czech Republic [LM2015058]
- STFC [ST/J000159/1, ST/P004423/1, 1651839] Funding Source: UKRI
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A beamline dedicated to the production of laser-polarized radioactive beams has been constructed at ISOLDE, CERN. We present here different simulations leading to the design and construction of it, as well as technical details of the full setup and examples of the achieved polarizations for several radioisotopes. Beamline simulations show a good transmission through the entire line, in agreement with observations. Simulations of the induced nuclear spin-polarization as a function of atom-laser interaction length are presented for Na-26,Na-28, and for Ar-35, which is studied in this work. Adiabatic spin rotation calculations of the spin-polarized ensemble of atoms, and how this influences the observed nuclear ensemble polarization, are also performed for the same nuclei. For Ar-35, we show that multiple-frequency pumping enhances the ensemble polarization by a factor 1.85, in agreement with predictions from a rate equations model.
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