A possible underground accelerator in the Dresden Felsenkeller

Details A possible underground accelerator in the Dresden Felsenkeller A possible underground accelerator in the Dresden Felsenkeller

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jphcs.337a2032s&link_type=abstract

Journal of Physics: Conference Series, Volume 337, Issue 1, pp. 012032 (2012).

Physics

Scientific paper

Typical energies in an astrophysical scenario lie far below the Coulomb barrier. Therefore the cross section is tiny, and in an in-beam experiment the experimental counting rate in γ detectors is low. Often it is dominated by cosmic-ray induced background, even if suitable anticoincidence shields are applied. This problem can be overcome by placing the accelerator deep underground, where a sufficiently thick rock overburden attenuates cosmic rays. Based on the success of the LUNA 400 kV underground accelerator in Italy, several higher-energy underground accelerators are in the planning phase worldwide. All of them should be hosted in laboratories shielded by over 1000 m of rock, where cosmic-ray muons are negligible for the purposes of nuclear physics experiments. A preliminary background study indicates that a combined approach, using a shallow underground laboratory below 47 m of rock and an active shield to suppress surviving muons, results in a background level that is similar to deep underground sites.

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