Muon radiography with the NOvA Near Detector

0546035 - FZÚ 2022 RIV IT eng C - Conference Paper (international conference)
Filip, Peter
Muon radiography with the NOvA Near Detector.
PoS - Proceedings of Science. Vol. 390. Trieste: Sissa Medilab srl, 2021, č. článku 800. ISSN 1824-8039.
[40th International Conference on High Energy physics (ICHEP2020). virtual meeting (CZ), 28.07.2020-06.08.2020]
R&D Projects: GA MŠMT(CZ) LM2018113
Institutional support: RVO:68378271
Keywords : NOvA Near Detector * muon * radiographic maps
OECD category: Particles and field physics

Information on the geological and man-made structures, directly contributing to the overburden of the NOvA Near Detector, located 100 m underground at Fermilab, are extracted from the cosmic muon data accumulated in the period April 2015 - October 2016. Results of this radiographic analysis of cosmic data are obtained by exploiting the acceptance symmetries of the NOvA detector. Radiographic maps of the overburden variations are acquired without subtracting the surface muon flux (free sky data) and without MC simulation of the cosmic muons attenuation in the homogeneous and flat overburden. By directly subtracting the angular muon track data measured by the NOvA Near Detector, arriving from directions having the same attenuation length (in the flat-surface approximation) and belonging to the acceptance regions with the same reconstruction efficiency, one can efficiently obtain two-dimensional differential radiographic maps.

Permanent Link: http://hdl.handle.net/11104/0322616