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

Abstract

Here, the high magnetic field helicon experiment system is a helicon wave plasma (HWP) source device in a high axial magnetic field ( B 0 ) 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 ~10 18–10 20 m –3 and electron temperature ~4–7 eV was produced at high B 0 of 5100 G, with an RF power of 1500 W. Maximum Ar+ ion flux of 7.8 × 10 23 m –2 s –1 with a bright blue core plasma was obtained at a high B 0 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 favorablemore » wall conditioning with a removal rate of 1.1 × 10 24 N 2/m 2h.« less

Authors:
 [1];  [1];  [2];  [1];  [1];  [3]
  1. Soochow Univ., Suzhou (People's Republic of China)
  2. Soochow Univ., Suzhou (People's Republic of China); Xi'an Jiaotong Univ., Xi'an (People's Republic of China)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1465683
Grant/Contract Number:  
National Magnetic Confinement Fusion Science Program of China (Grant Nos. 2014GB106005 and 2010GB106000), National Natural Science Foundation of China (No. 11505123 11435009 11375126), and a Project funded by China Postdoctoral Science Foundation (No. 156455)
Resource Type:
Accepted Manuscript
Journal Name:
Plasma Science and Technology
Additional Journal Information:
Journal Volume: 20; Journal Issue: 8; Journal ID: ISSN 1009-0630
Publisher:
IOPScience
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; helicon wave plasma; high magnetic field; wall conditioning

Citation Formats

Zhang, Guilu, Huang, Tianyuan, Jin, Chenggang, Wu, Xuemei, Zhuge, Lanjian, and Ji, Hantao. Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies. United States: N. p., 2018. Web. doi:10.1088/2058-6272/aac014.
Zhang, Guilu, Huang, Tianyuan, Jin, Chenggang, Wu, Xuemei, Zhuge, Lanjian, & Ji, Hantao. Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies. United States. doi:10.1088/2058-6272/aac014.
Zhang, Guilu, Huang, Tianyuan, Jin, Chenggang, Wu, Xuemei, Zhuge, Lanjian, and Ji, Hantao. Fri . "Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies". United States. doi:10.1088/2058-6272/aac014. https://www.osti.gov/servlets/purl/1465683.
@article{osti_1465683,
title = {Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies},
author = {Zhang, Guilu and Huang, Tianyuan and Jin, Chenggang and Wu, Xuemei and Zhuge, Lanjian and Ji, Hantao},
abstractNote = {Here, 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.},
doi = {10.1088/2058-6272/aac014},
journal = {Plasma Science and Technology},
number = 8,
volume = 20,
place = {United States},
year = {2018},
month = {7}
}

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