<abstract xmlns="http://www.w3.org/1999/xhtml">The neutron emission rate is a crucial parameter for most of the radiation sources that emit neutrons. In the case of large fusion devices the determination of this parameter is necessary for a proper assessment of the power release and the prediction for the neutron budget. The 14 MeV neutron generator will be used for calibration of neutron diagnostics at JET and ITER facilities. The stability of the neutron generator working parameters like emission and angular homogeneity affects the accuracy of calibration other neutron diagnostics. The aim of our experiment was to confirm the usefulness of yttrium activation method for monitoring of the neutron generator SODERN Model: GENIE 16. The reaction rate induced by neutrons inside the yttrium sample was indirectly measured by activation of the yttrium sample, and then by means of the γ-spectrometry method. The pre-calibrated HPGe detector was used to determine the yttrium radioactivity. The emissivity of neutron generator calculated on the basis of the measured radioactivity was compared with the value resulting from its electrical settings, and both of these values were found to be consistent. This allowed for a positive verification of the reaction cross section that was used to determine the reaction rate (6.45 × 10−21 reactions per second) and the neutron emission rate (1.04 × 108 n·s−1). Our study confirms usefulness of the yttrium activation method for monitoring of the neutron generator.</abstract>

The neutron emission rate is a crucial parameter for most of the radiation sources that emit neutrons. In the case of large fusion devices the determination of this parameter is necessary for a proper assessment of the power release and the prediction for the neutron budget. The 14 MeV neutron generator will be used for calibration of neutron diagnostics at JET and ITER facilities. The stability of the neutron generator working parameters like emission and angular homogeneity affects the accuracy of calibration other neutron diagnostics. The aim of our experiment was to confirm the usefulness of yttrium activation method for monitoring of the neutron generator SODERN Model: GENIE 16. The reaction rate induced by neutrons inside the yttrium sample was indirectly measured by activation of the yttrium sample, and then by means of the γ-spectrometry method. The pre-calibrated HPGe detector was used to determine the yttrium radioactivity. The emissivity of neutron generator calculated on the basis of the measured radioactivity was compared with the value resulting from its electrical settings, and both of these values were found to be consistent. This allowed for a positive verification of the reaction cross section that was used to determine the reaction rate (6.45 × 10−21 reactions per second) and the neutron emission rate (1.04 × 108 n·s−1). Our study confirms usefulness of the yttrium activation method for monitoring of the neutron generator.

Determination of the emission rate for the 14 MeV neutron generator with the use of radio-yttrium

Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland, Tel.: +48 22 638 1005 ext. 45, Fax: +48 22 666 8372

National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The neutron emission rate is a crucial parameter for most of the radiation sources that emit neutrons. In the case of large fusion devices the determination of...

Determination of the emission rate for the 14 MeV neutron generator with the use of radio-yttrium

Pubblicato online: 22 giu 2015

Pagine: 319 - 322

Ricevuto: 30 giu 2014

Accettato: 11 mar 2015

DOI: https://doi.org/10.1515/nuka-2015-0040

Parole chiave
14 MeV neutron generator, activation method, yttrium activation

© Ewa Laszynska et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Determination of the emission rate for the 14 MeV neutron generator with the use of radio-yttrium

Pubblicato online: 22 giu 2015

Pagine: 319 - 322

Ricevuto: 30 giu 2014

Accettato: 11 mar 2015

DOI: https://doi.org/10.1515/nuka-2015-0040

Parole chiave14 MeV neutron generator, activation method, yttrium activation

© Ewa Laszynska et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
14 MeV neutron generator, activation method, yttrium activation