The S$\pi$RIT Time Projection Chamber

TL;DR

The SπRIT TPC is a specialized detector designed for heavy ion collision experiments at RIKEN, enabling detailed particle reconstruction and isotopic resolution to study the nuclear matter equation of state.

Contribution

This paper introduces the design, construction, and performance evaluation of the SπRIT TPC, a novel detector for heavy ion collision experiments at RIKEN.

Findings

Excellent particle reconstruction capabilities.

Isotopic resolution for pions and light charged particles.

Effective performance demonstrated with cosmic ray and experimental data.

Abstract

The SAMURAI Pion Reconstruction and Ion-Tracker Time Projection Chamber (S$\pi$RIT TPC) was designed to enable measurements of heavy ion collisions with the SAMURAI spectrometer at the RIKEN Radioactive Isotope Beam Factory and provide constraints on the Equation of State of neutron-rich nuclear matter. The S$\pi$RIT TPC has a 50.5 cm drift length and an 86.4 cm $\times$ 134.4 cm pad plane with 12,096 pads that are equipped with the Generic Electronics for TPCs readout electronics. The S$\pi$RIT TPC allows excellent reconstruction of particles and provides isotopic resolution for pions and other light charged particles across a wide range of energy losses and momenta. Details of the S$\pi$RIT TPC are presented, along with discussion of the TPC performance based on cosmic ray and experimental data.