Most if not all tokamak heating scenarios involve multiple ion populations being heated simultaneously. To allow the simulation of various aspects of physics dynamics determining the characteristics of operational scenarios in a flexible way, speedy yet sufficiently accurate models are needed, and they should be connected to each other via a ‘backbone’. Under the umbrella of EUROfusion's Integrated Modelling efforts, such a structure is provided. The present paper focuses on one physics aspect: auxiliary heating. After solving the wave equation or beam source equation, this requires solving a set of coupled Fokker–Planck equations for the various populations involved. The adopted modules – enabling accounting for the Coulomb collisional interaction of several non-Maxwellian (minority, majority and beam) populations – are discussed and a practical example of their use is provided: the JET ‘baseline’ scenario heating a minority of ${}^3\textrm {He}$ ions in a balanced D$+$T mix heated by D and T neutral beams.

大多数（如果不是全部）托卡马克加热方案涉及同时加热多个离子种群。为了允许以灵活的方式模拟物理动力学的各个方面，确定操作场景的特征，需要快速而足够准确的模型，并且它们应该通过“主干”相互连接。在EUROfusion的集成建模工作的保护下，提供了这样的结构。本文着重于一个物理方面：辅助加热。在求解波动方程或波束源方程之后，这需要针对所涉及的各种种群求解一组耦合的Fokker-Planck方程。所采用的模块–能够解决几种非Maxwellian（少数族裔，$ {} ^ 3 \ textrm {He} $离子在由D和T中性束加热的平衡D $ + $ T混合物中。