Erosion resistance test of SiC mirror sample for ITER divertor VUV spectrometer

Boseong Kim; Kil Byoung Chai; Jae Sun Park; Changrae Seon; Young Hwa An; Yoo Kwan Kim; Mun Seong Cheon; Xavier Bonnin

doi:10.1016/j.fusengdes.2024.114210

Erosion resistance test of SiC mirror sample for ITER divertor VUV spectrometer

Boseong Kim, Kil Byoung Chai, Jae Sun Park, Changrae Seon, Young Hwa An, Yoo Kwan Kim, Mun Seong Cheon, Xavier Bonnin

Power Exhaust and Particle Control

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A series of tests have been performed to validate the resistance of the Silicon Carbide (SiC) mirror as the first mirror material of ITER VUV spectrometers to all ITER environmental conditions. In the present paper, we focused on the erosion (and deposition) of the SiC mirror sample caused by high-energy neutral particles. The flux of neutral particles reaching the first mirror was calculated using the ZEMAX software with a simplified entrance duct model. In the calculation, the particle flux reaching the first wall is necessary and the previously reported values derived from the SOLPS calculations were used. Based on this estimated particle flux, the erosion resistance tests were performed to check the erosion effect due to the high-energy neutral particles on the first mirror of ITER divertor VUV spectrometer. In the experiment, erosion was induced by exposing the SiC mirror sample to hydrogen and deuterium plasmas (and ions). The target fluence of incident ions in experiment is based on the estimation of the flux of neutral particles in ITER. The surface shape, composition, erosion depth, and surface roughness were measured to check the damage of the mirror surface after erosion test. Based on simulations and erosion resistance tests, it was concluded that the SiC mirror can be used as the first mirror of ITER divertor VUV spectrometer.

Original language	English
Article number	114210
Journal	Fusion Engineering and Design
Volume	200
DOIs	https://doi.org/10.1016/j.fusengdes.2024.114210
State	Published - Mar 2024

Funding

This work was supported by the Ministry of Science and ICT of Korea , through the ITER project contract ( RS-2022-00154842 ) and the Nation Research Foundation of Korea ( RS-2022-00155950 ). The views and opinions expressed herein do not necessarily reflect those of the ITER Organization.

Funders	Funder number
Ministry of Science, ICT and Future Planning	RS-2022-00154842
National Research Foundation of Korea	RS-2022-00155950

Keywords

First mirror
ITER
Optical diagnostics
Silicon carbide
VUV

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.fusengdes.2024.114210

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title = "Erosion resistance test of SiC mirror sample for ITER divertor VUV spectrometer",

abstract = "A series of tests have been performed to validate the resistance of the Silicon Carbide (SiC) mirror as the first mirror material of ITER VUV spectrometers to all ITER environmental conditions. In the present paper, we focused on the erosion (and deposition) of the SiC mirror sample caused by high-energy neutral particles. The flux of neutral particles reaching the first mirror was calculated using the ZEMAX software with a simplified entrance duct model. In the calculation, the particle flux reaching the first wall is necessary and the previously reported values derived from the SOLPS calculations were used. Based on this estimated particle flux, the erosion resistance tests were performed to check the erosion effect due to the high-energy neutral particles on the first mirror of ITER divertor VUV spectrometer. In the experiment, erosion was induced by exposing the SiC mirror sample to hydrogen and deuterium plasmas (and ions). The target fluence of incident ions in experiment is based on the estimation of the flux of neutral particles in ITER. The surface shape, composition, erosion depth, and surface roughness were measured to check the damage of the mirror surface after erosion test. Based on simulations and erosion resistance tests, it was concluded that the SiC mirror can be used as the first mirror of ITER divertor VUV spectrometer.",

keywords = "First mirror, ITER, Optical diagnostics, Silicon carbide, VUV",

author = "Boseong Kim and Chai, {Kil Byoung} and Park, {Jae Sun} and Changrae Seon and An, {Young Hwa} and Kim, {Yoo Kwan} and Cheon, {Mun Seong} and Xavier Bonnin",

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doi = "10.1016/j.fusengdes.2024.114210",

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T1 - Erosion resistance test of SiC mirror sample for ITER divertor VUV spectrometer

AU - Kim, Boseong

AU - Chai, Kil Byoung

AU - Park, Jae Sun

AU - Seon, Changrae

AU - An, Young Hwa

AU - Kim, Yoo Kwan

AU - Cheon, Mun Seong

AU - Bonnin, Xavier

PY - 2024/3

Y1 - 2024/3

N2 - A series of tests have been performed to validate the resistance of the Silicon Carbide (SiC) mirror as the first mirror material of ITER VUV spectrometers to all ITER environmental conditions. In the present paper, we focused on the erosion (and deposition) of the SiC mirror sample caused by high-energy neutral particles. The flux of neutral particles reaching the first mirror was calculated using the ZEMAX software with a simplified entrance duct model. In the calculation, the particle flux reaching the first wall is necessary and the previously reported values derived from the SOLPS calculations were used. Based on this estimated particle flux, the erosion resistance tests were performed to check the erosion effect due to the high-energy neutral particles on the first mirror of ITER divertor VUV spectrometer. In the experiment, erosion was induced by exposing the SiC mirror sample to hydrogen and deuterium plasmas (and ions). The target fluence of incident ions in experiment is based on the estimation of the flux of neutral particles in ITER. The surface shape, composition, erosion depth, and surface roughness were measured to check the damage of the mirror surface after erosion test. Based on simulations and erosion resistance tests, it was concluded that the SiC mirror can be used as the first mirror of ITER divertor VUV spectrometer.

AB - A series of tests have been performed to validate the resistance of the Silicon Carbide (SiC) mirror as the first mirror material of ITER VUV spectrometers to all ITER environmental conditions. In the present paper, we focused on the erosion (and deposition) of the SiC mirror sample caused by high-energy neutral particles. The flux of neutral particles reaching the first mirror was calculated using the ZEMAX software with a simplified entrance duct model. In the calculation, the particle flux reaching the first wall is necessary and the previously reported values derived from the SOLPS calculations were used. Based on this estimated particle flux, the erosion resistance tests were performed to check the erosion effect due to the high-energy neutral particles on the first mirror of ITER divertor VUV spectrometer. In the experiment, erosion was induced by exposing the SiC mirror sample to hydrogen and deuterium plasmas (and ions). The target fluence of incident ions in experiment is based on the estimation of the flux of neutral particles in ITER. The surface shape, composition, erosion depth, and surface roughness were measured to check the damage of the mirror surface after erosion test. Based on simulations and erosion resistance tests, it was concluded that the SiC mirror can be used as the first mirror of ITER divertor VUV spectrometer.

KW - First mirror

KW - ITER

KW - Optical diagnostics

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KW - VUV

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Erosion resistance test of SiC mirror sample for ITER divertor VUV spectrometer

Abstract

Funding

Keywords

UN SDGs

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