新古典撕裂模式的电子旋发射检测用于ITER的控制
J P Ziegel1, W L Rowan1, F L Waelbroeck1
1Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712, USA.
The Review of scientific instruments
|July 10, 2024
概括
在ITER中早期检测新古典撕裂模式 (NTM) 对于防止中断至关重要. 电子环子发射 (ECE) 诊断可以实现低延迟NTM检测,从而更好地控制等离子体不稳定性.
科学领域:
- 核聚变能源的研究.
- 血物理学的等离子体物理学
- 控制系统工程 控制系统工程
背景情况:
- 新古典撕裂模式 (NTMs) 是磁性不稳定性,通过降低等离子体封闭并可能导致中断,威胁到ITER的运行成功.
- 电子循环子发射 (ECE) 诊断已经显示出在当前实验设备中低延迟检测NTM的前景.
研究的目的:
- 通过合成诊断来证明ITER低延迟NTM检测的可行性.
- 在高温ITER场景中评估现实的仪器限制的影响.
- 为了优化辐射计配置,并确定最小可检测的NTM岛屿大小.
主要方法:
- 使用合成诊断模拟ITER IMAS数据库场景.
- 纳入了NTM岛屿生长和旋转的最新物理模型,包括相对论扩展效应.
- 通过模拟优化了辐射计配置,并使用NI PXI-7853R FPGA系统探索了硬件限制.
主要成果:
- 在播种后430毫秒和岛屿锁定之前,实现了2/1NTM的低延迟检测.
- 确定在2/1表面可以检测到大约3厘米的NTM岛屿大小.
- 模拟信号显示了早期的岛屿锁定和在中断之前的持续增长,为ITER ECE硬件提供了空间分辨率限制.
结论:
- 使用ECE诊断的低延迟NTM检测对于ITER来说是可行的,即使具有现实的仪器限制.
- 该研究通过定义相对论扩展所施加的空间分辨率限制,为硬件设计提供了关键的见解.
- 使用ITER所需的硬件展示了实时检测能力,为有效的NTM控制铺平了道路.
相关概念视频
Atomic Emission Spectroscopy: Instrumentation
359
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
359
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
208
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
208
Nuclear Fusion
19.1K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
19.1K
Atomic Emission Spectroscopy: Overview
2.0K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
2.0K
Atomic Emission Spectroscopy: Interference
179
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
179
Electromagnetic Fields
2.1K
Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of...
However, the observation of...
2.1K


