Performance evaluation of novel square-bordered position-sensitive silicon detectors with four-corner readout

TL;DR

This paper introduces a novel large-area silicon detector with four-corner readout, demonstrating high position and energy resolution suitable for precise particle detection.

Contribution

The paper presents a new square-shaped silicon detector with improved linearity and resolution, featuring a unique resistive anode and four-corner readout design.

Findings

Position resolution below 1 mm (FWHM)

Non-linearity less than 1% (rms)

Energy resolution around 2% (FWHM) from alpha source

Abstract

We report on a recently developed novel type of large area (62 mm x 62 mm) position sensitive silicon detector with four-corner readout. It consists of a square-shaped ion-implanted resistive anode framed by additional low-resistivity strips with resistances smaller than the anode surface resistance by a factor of 2. The detector position linearity, position resolution, and energy resolution were measured with alpha-particles and heavy ions. In-beam experimental results reveal a position resolution below 1 mm (FWHM) and a very good non-linearity of less than 1% (rms). The energy resolution determined from 228Th alpha source measurements is around 2% (FWHM).