Three-dimensional modeling of beam emission spectroscopy measurements in fusion plasmas

TL;DR

This paper introduces RENATE, a comprehensive 3D simulation code for Beam Emission Spectroscopy in fusion plasmas, enabling improved interpretation and development of BES diagnostics through detailed modeling and validation.

Contribution

The paper presents RENATE, a novel modular 3D simulation tool for BES diagnostics, incorporating detailed physics and optics modeling, validated against experimental data.

Findings

RENATE accurately simulates BES signals in fusion plasmas.

The code has been benchmarked against other simulation tools.

Validation against KSTAR data confirms its reliability.

Abstract

One of the main diagnostic tools for measuring electron density profiles and the characteristics of long wavelength turbulent wave structures in fusion plasmas is Beam Emission Spectroscopy (BES). The increasing number of BES systems necessitated an accurate and comprehensive simulation of BES diagnostics, which in turn motivated the development of the RENATE simulation code that is the topic of this paper. RENATE is a modular, fully three-dimensional code incorporating all key features of BES systems from the atomic physics to the observation, including an advanced modeling of the optics. Thus RENATE can be used both in the interpretation of measured signals and the development of new BES systems. The most important components of the code have been successfully benchmarked against other simulation codes. The primary results have been validated against experimental data from the KSTAR tokamak.