A thermal neutron sensor prototype for Humanitarian Dernining has been developed, trying to minimize cost and complexity of the system as required in such application. A Cf-252 source or a sealed-tube neutron generator is employed to produce primary fast neutrons that are thermalized in a moderator designed to optimize the neutron capture reaction yield in buried samples. A description of the sensor, including the performances of the acquisition system based on a Flash ADC card and final tests with explosive simulants are reported. A comparison of the sensor performance when using a radioactive source to that when employing a sealed-tube neutron generator is presented. Limitations and possible applications of this technique are discussed.
Development of a thermal neutron sensor for Humanitarian Demining
LUNARDON, MARCELLO;VIESTI, GIUSEPPE;
2004
Abstract
A thermal neutron sensor prototype for Humanitarian Dernining has been developed, trying to minimize cost and complexity of the system as required in such application. A Cf-252 source or a sealed-tube neutron generator is employed to produce primary fast neutrons that are thermalized in a moderator designed to optimize the neutron capture reaction yield in buried samples. A description of the sensor, including the performances of the acquisition system based on a Flash ADC card and final tests with explosive simulants are reported. A comparison of the sensor performance when using a radioactive source to that when employing a sealed-tube neutron generator is presented. Limitations and possible applications of this technique are discussed.
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