Design of a GEM-based detector for the measurement of fast neutrons

B. Esposito, F. Murtas, R. Villari, M. Angelone, D. Marocco, M. Pillon, S. Puddu

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Abstract

A novel neutron detector has been developed and tested in collaboration between LNF-INFN and ENEA-Frascati. The aim is to obtain a versatile system that can be employed for the simultaneous measurement of the neutron flux in various energy bands from 1 to 20 MeV. The main drive for this development is the need of neutron detectors with low sensitivity to γ-rays and high count rate capability for operation in the neutron flux environment ∼3 × 108n/cm2s expected in future controlled thermonuclear fusion reactors. In these devices the fusion power is assessed through the measurement of the 2.5 and 14 MeV neutrons emitted by the plasma. A multilayer detector architecture, including a proton recoil converter, a proton absorber and a triple Gas Electron Multiplier (GEM), has been adopted. The detector read-out system consists of 128 pads (12.3 × 6 mm2) in a 8 × 16 matrix. The work on the detector design and optimization carried out with the MCNPX code and the experimental tests at the Frascati Neutron Generator (FNG) on a detector prototype for 2.5 and 14 MeV measurements are presented. © 2009 Elsevier B.V.
Original languageEnglish
Pages (from-to)155 - 157
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume617
Issue number1-3
DOIs
Publication statusPublished - 11 May 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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