On the rework and development of new Geant4 Cherenkov models

TL;DR

This paper introduces new Geant4 Cherenkov models that enable accurate simulation of quasi-monochromatic Cherenkov spectral lines observed in experiments, addressing limitations of the traditional Frank-Tamm theory.

Contribution

The paper presents novel Geant4 models for Cherenkov radiation that account for frequency dispersion and thin radiators, improving simulation accuracy for experimental spectra.

Findings

Enables analysis of quasi-monochromatic Cherenkov spectral lines in Geant4

Addresses limitations of the Frank-Tamm theory for thin radiators

Provides a comprehensive guide for implementing new Cherenkov models

Abstract

A recent experiment showed that a Cherenkov radiation spectrum from thin radiators possessing frequency dispersion could transform into quasi-monochromatic spectral lines. Simulations based on the standard Geant4 toolkit could not correctly describe the experimental results because Geant4 uses the traditional Frank-Tamm theory developed for an ideal (infinitely thick) radiator. Because of that, our endeavors in this paper are to present a new way of utilizing Cherenkov radiation using new Gneat4 models, while the paper should be used as a helping text to understand the Cherenkov process in Geant4 and what one can expect out of new models. Now, one can analyze quasi-monochromatic Cherenkov spectral lines using Geant4, which is a significant milestone for investigating the possibilities of this technique.