A Telescope System for Charge and Position Measurement of High Energy Nuclei

Abstract

A high-granularity telescope system with a large sensitive area and low material budget has been developed for high-energy heavy ion beam tests. The telescope consists of nine layers of silicon microstrip detectors (SSDs), whose performance was validated through a heavy ion beam test at the CERN SPS. A hybrid machine learning algorithm is proposed to address the challenges of nuclear charge measurement with SSDs. The system achieves a spatial resolution of $\mathcal{O}(1)$\SI{}{\micro\metre} and a charge resolution better than 0.16 charge units for nuclei from $Z=1$ to $Z=29$, with a sensitive area of $8\times 8{\mathrm{cm}}^2$. To the best of our knowledge, this represents the most precise charge and spatial resolution simultaneously achieved by a silicon telescope to date.