Articolo in rivista, 2011, ENG, 10.1016/j.nima.2011.08.025

PiBrED--A novel bragg edge detector for neutrons

V. Finocchiaro a,b, F. Aliotta b, D. Tresoldi b, R.C. Ponterio b, C.S. Vasi b, G. Salvato b,n

a Dipartimento di Fisica della Materia e Ingegneria Elettronica, Universita di Messina, Salita, Sperone 31, I-98166 Messina, Italy b CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno d'Alcontres 37, I-98158 Messina, Italy

We present a single pixel prototype of a pixelated Bragg edge detector for neutron transmission measurements. The optical signal coming from a scintillator is collected by an optical fiber and is detected by an avalanche photodiode. A fast, Field Programmable Gate Array based, readout allows to obtain transmission spectra within reasonable acquisition times. The performances of the instrument have been tested by measuring the transmission spectra of iron powder samples with two different scintillators. The instrument accuracy in detecting the Bragg edges positions is comparable with the state of the art for similar devices.

Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (Online) 659 , pp. 383–386

Keywords

Neutron detector, Bragg edge detector, Energy selective neutron imaging

CNR authors

Tresoldi Dario, Finocchiaro Vincenzo, Aliotta Francesco, Ponterio Rosina Celeste, Salvato Gabriele, Vasi Cirino Salvatore

CNR institutes

IPCF – Istituto per i processi chimico-fisici