The basic principles for designing a camera system for neutron imaging in low fusion power tokamaks are illustrated for the case of the HL-2A tokamak device. HL-2A has an approximately circular cross section, with total neutron yields of about 1012 n/s under 1 MW neutral beam injection (NBI) heating. The accuracy in determining the width of the neutron emission profile and the plasma vertical position are chosen as relevant parameters for design optimization. Typical neutron emission profiles and neutron energy spectra are calculated by Monte Carlo method. A reference design is assumed, for which the direct and scattered neutron fluences are assessed and the neutron count profile of the neutron camera is obtained. Three other designs are presented for comparison. The reference design is found to have the best performance for assessing the width of peaked to broadened neutron emission profiles. It also performs well for the assessment of the vertical position.

Xie, X., Yuan, X., Zhang, X., Nocente, M., Chen, Z., Peng, X., et al. (2016). Conceptual design of a camera system for neutron imaging in low fusion power tokamaks. JOURNAL OF INSTRUMENTATION, 11(2) [10.1088/1748-0221/11/02/C02023].

Conceptual design of a camera system for neutron imaging in low fusion power tokamaks

NOCENTE, MASSIMO;
2016

Abstract

The basic principles for designing a camera system for neutron imaging in low fusion power tokamaks are illustrated for the case of the HL-2A tokamak device. HL-2A has an approximately circular cross section, with total neutron yields of about 1012 n/s under 1 MW neutral beam injection (NBI) heating. The accuracy in determining the width of the neutron emission profile and the plasma vertical position are chosen as relevant parameters for design optimization. Typical neutron emission profiles and neutron energy spectra are calculated by Monte Carlo method. A reference design is assumed, for which the direct and scattered neutron fluences are assessed and the neutron count profile of the neutron camera is obtained. Three other designs are presented for comparison. The reference design is found to have the best performance for assessing the width of peaked to broadened neutron emission profiles. It also performs well for the assessment of the vertical position.
Articolo in rivista - Articolo scientifico
Nuclear instruments and methods for hot plasma diagnostics; Plasma diagnostics - interferometry; spectroscopy and imaging;
Nuclear instruments and methods for hot plasma diagnostics; Plasma diagnostics - interferometry; spectroscopy and imaging; Instrumentation; Mathematical Physics
English
Xie, X., Yuan, X., Zhang, X., Nocente, M., Chen, Z., Peng, X., et al. (2016). Conceptual design of a camera system for neutron imaging in low fusion power tokamaks. JOURNAL OF INSTRUMENTATION, 11(2) [10.1088/1748-0221/11/02/C02023].
Xie, X; Yuan, X; Zhang, X; Nocente, M; Chen, Z; Peng, X; Cui, Z; Du, T; Hu, Z; Li, T; Fan, T; Chen, J; Li, X; Zhang, G; Yuan, G; Yang, J; Yang, Q
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/128653
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