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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Modeling of bremsstrahlung emission from the confined runaway electrons and applications to the hard x-ray monitor of ITER
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Modeling of bremsstrahlung emission from the confined runaway electrons and applications to the hard x-ray monitor of ITER

机译：将狭窄的失控电子和应用的布雷斯斯特拉隆发射建模在艾特的硬X射线监测仪中

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摘要

The importance of runaway electron (RE) detection, analysis of its parameters and suppression or mitigation is well recognized for large size tokamaks such as ITER. One of the well-established detection techniques is hard x-ray spectrometry that detects bremsstrahlung emission typically in the MeV range from the REs. It provides space, time and energy resolved measurements, which can also be utilized for the reconstruction of the RE energy distribution function. In this paper, forward modeling has been carried out for the detection of the confined REs and a numerical tool is developed. It calculates analytically anisotropic bremsstrahlung emissivity at each spatial position in the plasma in terms of several plasma, RE and geometrical parameters. The simulation provides line integrated energy resolved spectra of bremsstrahlung photons. The expected bremsstrahlung emission signal during plasma disruptions scenario as measured with the ITER hard x-ray monitor has been simulated for the first time aiming on optimizing the design parameters of this diagnostic. The possible dynamic range for the detection of confined REs is studied as well. The effect of the shape of the runaway distribution function in the momentum space on the observed diagnostic signal is also studied and briefly discussed.
机译：Runaway电子（RE）检测的重要性，其参数和抑制或缓解的分析对于大尺寸的Tokamaks，如迭代，得到了很好的认可。良好的检测技术之一是硬X射线光谱测定法，其通常检测来自RES的MEV范围内的Bremsstrahlung发射。它提供了空间，时间和能量解决的测量，其也可以用于重建重新能量分配功能。在本文中，已经进行了向前建模，用于检测密闭RES，并且开发了数值工具。它根据几种等离子体，Re和几何参数计算了等离子体中的每个空间位置的分析各向异性Bremsstrahlung发射率。仿真提供了Bremsstrahlung光子的线集成能量分辨光谱。已经模拟了使用ITER硬X射线监视器测量的等离子体中断场景期间的预期Bremsstrahlung发射信号已经旨在优化该诊断的设计参数。研究了用于检测密闭RE的可能动态范围。还研究了在观察到的诊断信号上的动量空间中的失控分布函数的形状的影响也在简要讨论。

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