Developments in Nanosecond Pulse Detection Methods and Technology

TL;DR

This paper discusses recent advancements in signal processing technology for detecting ultra-high-energy neutrinos using the Lunar Cherenkov technique, focusing on radio telescope upgrades and real-time ionospheric pulse characterization.

Contribution

It introduces new signal processing methods and experimental applications for UHE neutrino detection with next-generation radio telescopes like the SKA.

Findings

Successful preliminary experiment with upgraded Australia Telescope Compact Array

Potential for fully utilizing Square Kilometre Array data

Development of real-time ionospheric pulse dispersion measurement

Abstract

A promising method for the detection of UHE neutrinos is the Lunar Cherenkov technique, which utilises Earth-based radio telescopes to detect the coherent Cherenkov radiation emitted when a UHE neutrino interacts in the outer layers of the Moon. The LUNASKA project aims to overcome the technological limitations of past experiments to utilise the next generation of radio telescopes in the search for these elusive particles. To take advantage of broad-bandwidth data from potentially thousands of antennas requires advances in signal processing technology. Here we describe recent developments in this field and their application in the search for UHE neutrinos, from a preliminary experiment using the first stage of an upgrade to the Australia Telescope Compact Array, to possibilities for fully utilising the completed Square Kilometre Array. We also explore a new real time technique for characterising ionospheric pulse dispersion which specifically measures ionospheric electron content that is line of sight to the moon.