Beam Test of the PIN-diode Readout Units with Electron Energies from 5 to 40 GeV at CERN SPS

TL;DR

This paper reports on beam tests of a PIN-diode-based detector unit with lead tungstate crystals at CERN SPS, demonstrating excellent linearity and energy resolution for electron energies from 5 to 40 GeV.

Contribution

It presents the first beam test results of a PIN-diode readout unit integrated with lead tungstate crystals for high-energy electron detection.

Findings

Achieved excellent linearity between beam energy and detector response.

Demonstrated effective summation correction method for energy measurement.

Confirmed punch-through effect can be ignored in the detector design.

Abstract

The Chinese large-area violet-light-sensitive silicon photodiode PIN is one of the candidates of the lead tungstate crystal detector readout component of the photon spectrometer in the large heavy ion collision experiment. The PIN diode was assembled with the lead tungstate crystal and the low-noise preamplifier into a complete detector unit. The beam test was carried out on the SPS accelerator at CERN. The energy resolution was measured with the electron beam energy ranging from 5 to 40 GeV. The summation correction method was discussed, and an excellent linearity of the nominal beam energy versus the peak position of the detector was obtained, which showed the punch-through effect can be ignored.