IMAT is a new cold-neutron imaging facility at the neutron spallation source ISIS at the Rutherford Appleton Laboratory, U.K.. The ISIS pulsed source enables energy-selective and energy-resolved neutron imaging via time-of-flight (TOF) techniques, which are available in addition to the white-beam neutron radiography and tomography options. A spatial resolution of about 50 μm for white-beam neutron radiography was achieved early in the IMAT commissioning phase. In this work we have made the first steps towards achieving higher spatial resolution. A white-beam radiography with 18 μm spatial resolution was achieved in this experiment. This result was possible by using the event counting neutron pixel detector based on micro-channel plates (MCP) coupled with a Timepix readout chip with 55 μm sized pixels, and by employing an event centroiding technique. The prospects for energy-selective neutron radiography for this centroiding mode are discussed.

Minniti, T., Tremsin, A., Vitucci, G., & Kockelmann, W. (2018). Towards high-resolution neutron imaging on IMAT. JOURNAL OF INSTRUMENTATION, 13(1) [10.1088/1748-0221/13/01/C01039].

Towards high-resolution neutron imaging on IMAT

Vitucci, G;
2018

Abstract

IMAT is a new cold-neutron imaging facility at the neutron spallation source ISIS at the Rutherford Appleton Laboratory, U.K.. The ISIS pulsed source enables energy-selective and energy-resolved neutron imaging via time-of-flight (TOF) techniques, which are available in addition to the white-beam neutron radiography and tomography options. A spatial resolution of about 50 μm for white-beam neutron radiography was achieved early in the IMAT commissioning phase. In this work we have made the first steps towards achieving higher spatial resolution. A white-beam radiography with 18 μm spatial resolution was achieved in this experiment. This result was possible by using the event counting neutron pixel detector based on micro-channel plates (MCP) coupled with a Timepix readout chip with 55 μm sized pixels, and by employing an event centroiding technique. The prospects for energy-selective neutron radiography for this centroiding mode are discussed.
Articolo in rivista - Articolo scientifico
Scientifica
Inspection with neutrons; Instrumentation for neutron sources; Neutron detectors (cold, thermal, fast neutrons); Neutron radiography; Instrumentation; Mathematical Physics
English
Minniti, T., Tremsin, A., Vitucci, G., & Kockelmann, W. (2018). Towards high-resolution neutron imaging on IMAT. JOURNAL OF INSTRUMENTATION, 13(1) [10.1088/1748-0221/13/01/C01039].
Minniti, T; Tremsin, A; Vitucci, G; Kockelmann, W
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/186823
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