在温德尔斯坦7-X的高等离子体压力和下值动力气球运输模式的增强运输
P Mulholland1, K Aleynikova2, B J Faber3
1Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands.
Physical review letters
|November 17, 2023
概括
恒星器中的高压聚变等离子体是复杂的. 低值动力气球模式 (stKBMs) 破坏了离子-温度梯度流的稳定性,影响了温德尔斯坦7-X的热量流和性能.
科学领域:
- 血物理学的等离子体物理学
- 核聚变能源的研究.
- 恒星器的动态 恒星器动态
背景情况:
- 高性能聚变等离子体需要高等离子体压力 (β).
- 在高β的恒星器类型设备中理解等离子体行为是有限的.
- 离子温度梯度 (ITG) 驱动的流是等离子束的一个关键因素.
研究的目的:
- 研究高等离子压力 (β) 对温德尔斯坦7-X (W7-X) 离子温度梯度 (ITG) 流的影响.
- 描述亚主导动力气球模式 (KBMs) 在高β模式中的作用.
- 确定这些模式如何影响流和和热传输.
主要方法:
- 温德尔斯坦7-X (W7-X) 实验中的流分析.
- 在理想的磁动力学 (MHD) 值以下,研究动力气球模式 (KBM) 的稳定性.
- 检查区域流量侵蚀对流动力学的影响.
主要成果:
- 亚主导动力气球模式 (stKBMs) 在理想的MHD值以下是不稳定的.
- 这些stKBM在ITG流中变得非常激动.
- stKBMs通过区域流量侵蚀影响ITG和,导致热流量增加.
结论:
- 低值KBM显著影响W7-X.中的等离子体流和传输.
- 控制stKBM对于在W7-X和未来的恒星器中实现最佳性能至关重要.
- 对stKBM的进一步研究对于推进核聚变能源至关重要.
相关概念视频
Hess's Law
45.2K
There are two ways to determine the amount of heat involved in a chemical change: measure it experimentally, or calculate it from other experimentally determined enthalpy changes. Some reactions are difficult, if not impossible, to investigate and make accurate measurements for experimentally. And even when a reaction is not hard to perform or measure, it is convenient to be able to determine the heat involved in a reaction without having to perform an experiment.
45.2K
Fermi Level Dynamics
257
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
257
Steady, Laminar Flow Between Parallel Plates
200
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
200
Excess Pressure Inside a Drop and a Bubble
1.7K
The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
1.7K
Atomic Nuclei: Nuclear Relaxation Processes
657
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis.
657
Couette Flow
286
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
286


