Abstract
The LPCTrap setup is a transparent Paul trap dedicated to the measurement of the β–ν correlation coefficient a βν in the β decay of trapped radioactive nuclides. In a first experiment, the system has been used to record ∼105 coincidences between the β particles and recoiling ions emitted from the decay of 6He + ions. The analysis of the collected data has already shown that the size of the 6He + ion cloud confined in the Paul trap is a critical parameter, potentially limiting the accuracy on the a βν measurement. We report here the precise determination of the trapped ion cloud temperature and size. This was performed by extracting the trapped ions toward a position sensitive micro channel plate detector at different phases of the RF driving field. We find a temperature T exp = 0.107(7) eV, consistent with the temperature values inferred using two other observables but 20% higher than the temperature T sim = 0.09 eV predicted by realistic simulations of the ions interacting with the H2 buffer gas.
Similar content being viewed by others
References
Rodríguez, D., et al.: Nucl. Instrum. Methods. Phys. Res. A 565, 876 (2006)
Fléchard, X., et al.: Phys. Rev. Lett. 101, 212504 (2008)
Vetter, P.A., et al.: Phys. Rev. C 77, 035502 (2008)
Gorelov, A., et al.: Phys. Rev. Lett. 94, 142501 (2005)
Darius, G., et al.: Rev. Sci. Instrum. 75, 4804 (2004)
Fléchard, X., et al.: J. Phys. G 38, 055101 (2011)
Ban, G., et al.: Nucl. Instrum. Methods. Phys. Res. A 518, 712 (2004)
Rodríguez, D., et al.: Eur. Phys. J. A 42, 397 (2009)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Fléchard, X., Ban, G., Durand, D. et al. Temperature measurement of 6He + ions confined in a transparent Paul trap. Hyperfine Interact 199, 21–27 (2011). https://doi.org/10.1007/s10751-011-0297-5
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10751-011-0297-5