Articolo in rivista, 2023, ENG, 10.1016/j.fusengdes.2023.113663
Veronese F.; Agostinetti P.; Hopf C.; Starnella G.
Consorzio RFX (CNR, ENEA, INFN, University of Padova, Acciaierie Venete S.p.A.), Padova, Italy; Centro Ricerche Fusione (CRF), Università di Padova, Italy; CNR ISTP - Institute for Plasma Science and Technology - Section of Padova, Italy; Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen, Germany.
The Beam Driven Plasma Neutralizer (BDPN) has been proposed as a more efficient alternative to the gas neutralizer for negative-ion based Neutral Beam Injection (NNBI). In this paper we model the performance of an entire NNBI beamline with a BDPN. We simultaneously consider all the relevant physics and engineering aspects, the most important being the plasma density and degree of ionization inside the BDPN as a function of its geometry and feed gas flow, the geometrical transmission of the beamline, the dependence of the neutral gas distribution in the beamline on the geometry of the beamline components and gas flows, and the species evolution of the extracted D- beam through this neutral and charged particle distribution. Furthermore, we calculate the heat loads expected on the BDPN parts and on the NBI components located downstream of it and study the effect of the magnetic cusp field across the BDPN entrance on beamline transmission. While our results constitute an optimization only under the applied boundary conditions, we find that the beamline with a BDPN increases the system's wall plug efficiency by about 13% to 0.34 from the 0.30 estimated for a gas neutralizer.
Fusion engineering and design (Print) 193 , pp. 113663-1–113663-9
ID: 480141
Year: 2023
Type: Articolo in rivista
Creation: 2023-04-11 17:21:38.000
Last update: 2023-05-02 09:46:43.000
CNR authors
CNR institutes
External links
OAI-PMH: Dublin Core
OAI-PMH: Mods
OAI-PMH: RDF
DOI: 10.1016/j.fusengdes.2023.113663
URL: https://www.sciencedirect.com/science/article/abs/pii/S0920379623002466
External IDs
CNR OAI-PMH: oai:it.cnr:prodotti:480141
DOI: 10.1016/j.fusengdes.2023.113663
Scopus: 2-s2.0-85150435107
ISI Web of Science (WOS): 000959946800001