Low energy tracking and particles identification in the MUNU Time Projection Chamber at 1 bar. Possible application in low energy solar neutrino spectroscopy

TL;DR

This paper demonstrates low energy electron tracking and particle identification in the MUNU TPC at 1 bar, with potential applications in low energy solar neutrino spectroscopy, by measuring electrons down to 80 keV and reconstructing their energy and direction.

Contribution

It introduces a method for low energy electron detection and reconstruction in a TPC at 1 bar, enabling potential solar neutrino studies.

Findings

Successful measurement of electrons down to 80 keV

Reconstruction of electron energy and direction above 200 keV

Reconstruction of the 137Cs photopeak using Compton electrons

Abstract

In this paper we present the results from the measurements made with the MUNU TPC at 1bar pressure of CF4 in the energy region below 1 MeV. Electron events down to 80 keV are successfully measured. The electron energy and direction are reconstructed for every contained single electron above 200 keV. As test the 137Cs photopeak is reconstructed by measuring both the energy and direction of the Compton electrons in the TPC.