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

• Authors: Ewa Laszynska , Slawomir Jednorog , Adam Ziolkowski , Michal Gierlik , Jacek Rzadkiewicz
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

14 MeV neutron generator; activation method; yttrium activation

• Publisher: De Gruyter Open
• Journal: Nukleonika
• Year: 2015
• Volume: 60
• Issue: 2
• Pages: 319-322

Dates

published

1 - 6 - 2015

accepted

11 - 3 - 2015

online

22 - 6 - 2015

received

30 - 6 - 2014

Contributors

author

Ewa Laszynska

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland, Tel.: [phone] ext. 45, Fax: [phone]

author

Slawomir Jednorog

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland, Tel.: [phone] ext. 45, Fax: [phone]

author

Adam Ziolkowski

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland, Tel.: [phone] ext. 45, Fax: [phone]

author

Michal Gierlik

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

author

Jacek Rzadkiewicz

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

References

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Identifiers

DOI

10.1515/nuka-2015-0040