Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies

Guilu ZHANG (张桂炉); Tianyuan HUANG (黄天源); Chenggang JIN (金成刚); Xuemei WU (吴雪梅); Lanjian ZHUGE (诸葛兰剑); Hantao JI (吉瀚涛)

doi:10.1088/2058-6272/aac014

Plasma Science and Technology > 2018 > 20(8): 85603-085603. > DOI: 10.1088/2058-6272/aac014

Guilu ZHANG (张桂炉), Tianyuan HUANG (黄天源), Chenggang JIN (金成刚), Xuemei WU (吴雪梅), Lanjian ZHUGE (诸葛兰剑), Hantao JI (吉瀚涛). Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies[J]. Plasma Science and Technology, 2018, 20(8): 85603-085603. DOI: 10.1088/2058-6272/aac014

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Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies

¹ College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, People’s Republic of China
² Key Laboratory of Modern Optical Technologies (Soochow University), Education of Ministry & Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, People’s Republic of China
³ Analysis and Testing Center, Soochow University, Suzhou 215123, People’s Republic of China
⁴ Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, United States of America
⁵ State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China

Funds: This work was supported by the National Magnetic Confinement Fusion Science Program of China (Grant Nos. 2014GB106005 and 2010GB106000), National Natural Science Foundation of China (Nos. 11505123 11435009 11375126), and a Project funded by China Postdoctoral Science Foundation (No. 156455).

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Received Date: December 03, 2017

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Abstract

Abstract

The high magnetic field helicon experiment system is a helicon wave plasma (HWP) source device in a high axial magnetic field ( B₀ ) developed for plasma–wall interactions studies for fusion reactors. This HWP was realized at low pressure (5 × 10⁻³ − 10 Pa) and a RF (radio frequency, 13.56 MHz) power (maximum power of 2 kW) using an internal right helical antenna (5 cm in diameter by 18 cm long) with a maximum B 0 of 6300 G. Ar HWP with electron density ~10¹⁸–10²⁰ m⁻³ and electron temperature ~4–7 eV was produced at high B₀ of 5100 G, with an RF power of 1500 W. Maximum Ar⁺ ion flux of 7.8 × 10²³ m⁻² s⁻¹ with a bright blue core plasma was obtained at a high B₀ of 2700 G and an RF power of 1500 W without bias. Plasma energy and mass spectrometer studies indicate that Ar⁺ ion-beams of 40.1 eV are formed, which are supersonic (~3.1c s). The effect of Ar HWP discharge cleaning on the wall conditioning are investigated by using the mass spectrometry. And the consequent plasma parameters will result in favorable wall conditioning with a removal rate of 1.1 × 10²⁴ N₂/m²h.
- helicon wave plasma,
- high magnetic field,
- wall conditioning

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References (32)

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