Development toward a ground-based interferometric phased array for radio detection of high energy neutrinos

• Published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• Main Authors: Avva, J., Bechtol, K., Chesebro, T., Cremonesi, L., Deaconu, C., Gupta, A., Ludwig, A., Messino, W., Miki, C., Nichol, R., Oberla, E., Ransom, M., Romero-Wolf, A., Saltzberg, D., Schlupf, C., Shipp, N., Varner, G., Vieregg, A. G., Wissel, S. A.
• Language: unknown
• Published: 2023
• Subjects: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Greenland
• Online Access: http://www.osti.gov/servlets/purl/1598612; https://www.osti.gov/biblio/1598612; https://doi.org/10.1016/j.nima.2017.07.009

Here, the in-ice radio interferometric phased array technique for detection of high energy neutrinos looks for Askaryan emission from neutrinos interacting in large volumes of glacial ice, and is being developed as a way to achieve a low energy threshold and a large effective volume at high energies. The technique is based on coherently summing the impulsive Askaryan signal from multiple antennas, which increases the signal-to-noise ratio for weak signals. We report here on measurements and a simulation of thermal noise correlations between nearby antennas, beamforming of impulsive signals, and a measurement of the expected improvement in trigger efficiency through the phased array technique. Furthermore, we discuss the noise environment observed with an analog phased array at Summit Station, Greenland, a possible site for an interferometric phased array for radio detection of high energy neutrinos.