等离子体燃烧-思维隙的差距
1UKAEA, Culham Campus, Abingdon , Oxon OX14 3DB, UK.
概括
设计用于Spherical Tokamak for Energy Production (STEP) 的等离子体场景,重点是使用双零配置和具有正三角性高核心性能的可控排气. 微波将为这种融合能源概念提供外部电流驱动.
科学领域:
- 核聚变工程 核聚变工程
- 等离子体物理学的物理学
- 先进的反应堆设计
背景情况:
- 能源生产球形托卡马克 (STEP) 计划旨在设计用于净发电的核聚变反应堆.
- 与未来燃烧等离子体概念相比,当前的球形托卡马克 (ST) 具有显著的性能差距.
- 为了弥合这一差距,人们对等离子体性能做出了保守的假设.
研究的目的:
- 为 STEP 核聚变能源项目概述等离子体场景设计.
- 确定实现净电力生产的关键物理和技术挑战.
- 为管理等离子体废气,核心运输和中断提出战略.
主要方法:
- 评估等离子体配置,包括双零 (DN) 和正三角 (PT).
- 对外部加热和电流驱动 (CD) 系统的评估,偏爱基于微波的CD.
- 分析操作要求,如电阻壁模式 (RWM) 稳定和高延长.
主要成果:
- 双零配置是可管理的等离子体排气的首选.
- 带有高中心安全因子的正三角性等离子体提高了核心性能.
- 微波被认为是最有效的外部电流驱动方法.
- 积极的RWM稳定和高延长对于紧的STEP设计至关重要.
结论:
- 由于高正常化等离子体压力,核心运输仍然存在重大挑战,需要专门的实验和先进的模型.
- 必须控制或减轻边缘局部模式 (ELM),以确保材料完整性.
- 需要新的技术来管理高失控电子电流在电厂可行性中断期间.
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