Impact of suprathermal ions on neutron yield in the pre-DT phase of ITER operation

Polevoi, A. R.; Loarte, A.; Bilato, R.; Gorelenkov, N.; Kazakov, Ye O.; Polunovskiy, E.; Tchistiakov, A.; Fable, E.; Kiptily, V.; Krasilnikov, A. V.; Kuyanov, A. Y.; Nazikian, R.; Pinches, S. D.; Schneider, M.

doi:10.1088/1741-4326/abfa33

Impact of suprathermal ions on neutron yield in the pre-DT phase of ITER operation

Journal Article · Thu Jun 03 00:00:00 EDT 2021 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/abfa33· OSTI ID:1815383

Polevoi, A. R.; ; Bilato, R.; Gorelenkov, N.; ; Polunovskiy, E.; Tchistiakov, A.; Fable, E.; Kiptily, V.; Krasilnikov, A. V.; Kuyanov, A. Y.; Nazikian, R.; Pinches, S. D.; Schneider, M.

An assessment of neutron production during the pre-fusion power-operation (PFPO) phase has been carried out for a representative set of plasma scenarios predicted by the ITER Research Plan. A range of heating systems, namely neutral beam injection (NBI) (hydrogen), electron cyclotron resonance heating (ECRH), and ion cyclotron resonance heating (ICRH) are planned to be used for PFPO studies in helium, hydrogen, and mixed hydrogen–helium plasmas. Fast ions (protons and 3He) originating from NBI and ICRH systems can increase neutron production in PFPO plasmas by directly interacting with intrinsic Be impurities or through secondary processes, as also evidenced at JET. The generation of fast ions in ITER PFPO scenarios has been modelled using the ASTRA-NBI and TORIC-SSFPQL codes. A significant impact of the synergy between hydrogen NBI and hydrogen-minority ICRH on neutron production in helium plasmas is reported. In addition, the stability of the toroidicity-induced Alfvén eigenmodes (TAE) is analyzed for PFPO plasmas with a high pressure of suprathermal ions and a weak reversed shear. The possible impact of sawtooth oscillations and TAEs on neutron production is discussed, based on a linear stability analysis.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: the ITER Organization

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1815383

Alternate ID(s):: OSTI ID: 23075941
OSTI ID: 23129786

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 7 Vol. 61; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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