Calibration of the Radio Neutrino Observatory - Greenland (RNO-G)

Abstract

The Radio Neutrino Observatory Greenland (RNO-G) is a radio detector for neutrinos with energies above ∼10 PeV. It is currently under construction at Summit Station, Greenland, with 7 out of 35 stations deployed so far. By measuring the radio pulses that are emitted when ultrahigh energy neutrinos interact in ice, each station can detect neutrinos over distances of several kilometer and functions as an independent detector. A station consists of a total of 24 antennas, which are divided into a shallow component of 9 logarithmic-periodic dipole antennas near the surface, and a deep component of dipole and slot antennas inside boreholes down to 100m depth. We present an overview of the calibration efforts for RNO-G and show first results of ice property studies, which are crucial for the RNO-G station calibration.

Status of RNO-G: Radio Neutrino Detector Greenland

“…An expedition is scheduled every year to deploy new stations and perform calibration measurements and in-ice studies. Last field season, in Summer 2023, was entirely dedicated to maintenance, calibration and positioning precision measurements [3].…”

“…At the moment the interlink between the receiver and antennas positions, and the refraction index of the firn seems to be the largest limitation on the direction reconstruction, hence further effort is being put in increasing the precision of these parameters. Results from the last field season can be found in [3].…”