Detailed Reproduction of the Neutron Emission From the Compact DT Neutron Generator Used as an In-situ Calibration Source at JET

被引：0
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作者：
Cufar, Aljaz [1 ]
Batistoni, Paola [2 ]
Ghani, Zamir [3 ]
Giacomelli, Luca [4 ]
Lengar, Igor [1 ]
Loreti, Stefano [2 ]
Milocco, Alberto [5 ]
Popovichev, Sergey [3 ]
Pillon, Mario [2 ]
Rigamonti, Davide [4 ]
Rebai, Marica [4 ]
Tardocchi, Marco [4 ]
Snoj, Luka [1 ,6 ]
机构：
[1] Jozef Stefan Inst, Reactor Phys Dept, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
[2] ENEA, Dipartimento Fus & Tecnol Sicurezza Nucl, Via E Fermi 45, I-00044 Rome, Italy
[3] CCFE, Abingdon OX14 3DB, Oxon, England
[4] CNR, Ist Fis Plasma P Caldirola, Milan, Italy
[5] Univ Milano Bicocca, Dipartimento Fis G Occhialini, Milan, Italy
[6] Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia
来源：
27TH INTERNATIONAL CONFERENCE NUCLEAR ENERGY FOR NEW EUROPE (NENE 2018) | 2018年
关键词：
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中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
A compact DT neutron generator based on the mixed-beam operation was used as an in-situ calibration neutron source in the latest calibration of neutron detectors at Joint European Torus (JET). In order to meet the requirement for the total uncertainty of the neutron detector calibration below +/- 10%, the neutron emission properties had to be experimentally characterised and reproduced with detailed modelling of the neutron source characteristics and geometry of the neutron generator. Additionally, the time dependence of the neutron emission was monitored during the calibration experiment to additionally increase the accuracy of the calibration factors. The neutronic simulations were an essential part of both the neutron source characterisation and JET neutron detector calibration. The complex neutron emission properties of the neutron generator were reproduced through a combination of simulations and high-resolution neutron spectroscopy measurements. The detailed model of the neutron generator's geometry was produced based on information from the supplier of the neutron generator and images from a computer tomography scan. The positioning of the neutron source inside the JET tokamak was reproduced based on the information from the remote handling system at JET the system responsible for the positioning of the source during the calibration experiment. This extensive effort resulted in the total uncertainties of the calibration factors well within the target value of +/- 10%.
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