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

doi:10.1088/2058-6272/aac014

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

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Abstract

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.

Authors:

Zhang, Guilu ^[1]; Huang, Tianyuan ^[1]; Jin, Chenggang ^[2]; Wu, Xuemei ^[1]; Zhuge, Lanjian ^[1]; Ji, Hantao ^[3]

Soochow Univ., Suzhou (People's Republic of China)
Soochow Univ., Suzhou (People's Republic of China); Xi'an Jiaotong Univ., Xi'an (People's Republic of China)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Publication Date:: 2018-07-06

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.

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                    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.

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                    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.

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@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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DOI: 10.1088/2058-6272/aac014

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