A total neutron yield constraint implemented to the RNC emissivity reconstruction on ITER tokamak

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00538149" target="_blank" >RIV/61389021:_____/20:00538149 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/20:00347613
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0920379620303884" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0920379620303884</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.fusengdes.2020.111840" target="_blank" >10.1016/j.fusengdes.2020.111840</a>

Result language
angličtina
Original language name
A total neutron yield constraint implemented to the RNC emissivity reconstruction on ITER tokamak
Original language description
The purpose of the ITER Radial Neutron Camera (RNC) is the measurement of the plasma neutron emissivity profile [neutrons∙s−1 m-3] for burn control purposes. The present RNC design consists of 22 collimated detector systems providing a set of line-integrated neutron measurements [neutrons∙s−1 m-2] with full coverage of the plasma poloidal cross-section, the neutron emissivity can be recovered from the line-integrated measurements by means of dedicated reconstruction techniques (1D spatial inversion, 2D tomography). The present paper focuses on the evaluation of the improvement in the RNC 2D reconstruction of the neutron emissivity obtained by using the total neutron yield value provided by an independent diagnostic as additional constraint in the tomography procedure. The analysis was performed using a tomography code based on the Minimum Fisher Regularization (MFR). A clear improvement of the neutron emissivity reconstruction has been observed when the total neutron yield constraint is considered. The improvement is seen in: extension of the spatial region in which the accuracy of the reconstruction is better than 10 %, better reconstruction of peaked emissivity profiles, and robustness against measurements noise and line of sight data loss.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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