Abstract
Negative ion sources for fusion are high densities plasma sources in large discharge volumes. There are many challenges in the modeling of these sources, due to numerical constraints associated with the high plasma density, to the coupling between plasma and neutral transport and chemistry, the presence of a magnetic filter, and the extraction of negative ions. In this paper we present recent results concerning these different aspects. Emphasis is put on the modeling approach and on the methods and approximations. The models are not fully predictive and not complete as would be engineering codes but they are used to identify the basic principles and to better understand the physics of the negative ion sources.
Highlights
Negative ion sources are used in a variety of research fields and applications [1] such as in tandem type electrostatic accelerators, cyclotrons, storage rings in synchrotrons, nuclear and particle physics and in magnetic fusion devices
General features and parallelization of particle-in-cell Monte Carlo collisions (PIC-MCC) simulation We have developed and used 2D and 3D parallel Cartesian electrostatic explicit PIC-MCC models [16, 17] to study the plasma of negative ion sources for fusion
This paper proposes a synthesis, illustrated with new results, of the work that has been carried at LAPLACE on the modeling and simulation of the negative ion sources for the neutral beam injection systems used in fusion applications (ITER, DEMO)
Summary
Original content from this Abstract work may be used under Negative ion sources for fusion are high densities plasma sources in large discharge volumes. Commons Attribution 3.0 many challenges in the modeling of these sources, due to numerical constraints associated with the licence. High plasma density, to the coupling between plasma and neutral transport and chemistry, the. Any further distribution of this work must maintain presence of a magnetic filter, and the extraction of negative ions. Emphasis is put on the modeling approach and on the methods the work, journal citation and approximations. The models are not fully predictive and not complete as would be engineering and DOI. Codes but they are used to identify the basic principles and to better understand the physics of the negative ion sources
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