Direct measurements of cosmic rays (TeV and beyond) in space using an ultra-thin homogeneous calorimeter

TL;DR

This paper introduces a novel method for measuring high-energy cosmic rays using an ultrathin homogeneous calorimeter, analyzing cascade correlations to determine primary particle energy efficiently in space.

Contribution

The paper presents a new approach for cosmic ray energy measurement with ultrathin calorimeters based on cascade correlation analysis, enabling space-based detection of TeV and higher energies.

Findings

Correlation curves are nearly parallel and independent of cascade depth.

The method allows primary energy determination with an ultrathin calorimeter.

Optimal design includes a heavy target and homogeneous absorption block.

Abstract

An approach for measuring energy of cosmic-ray particles with energies E > 10^12 eV using an ultrathin calorimeter is presented. The method is based on the analysis of the correlation dependence of the cascade size on the rate of development of the cascade process. In order to determine the primary energy, measurements are made based on the number of secondary particles in the cascade, Ne, at two observation levels Z1 and Z2, separated by an absorber layer. Based on the obtained measurements, a correlation analysis of the dependence of logNe(Z1) on the difference dN = log Ne(Z1) - log Ne(Z2) is carried out. The correlation curves (log Ne from dN) in the negative part of the dN axis are almost parallel to each other and practically do not depend on the depth of the cascade development. It makes it possible to determine the primary energy using an ultrathin calorimeter. The best option for applying the method is a calorimeter, which has a unit with a heavy target, leading to the rapid development of the cascade, and a homogeneous measuring and absorption block.