Effects of DC substrate bias voltage on dust flux in the Large Helical Device

Kazunori Koga, Katsushi Nishiyama, Yasuhiko Morita, Giichiro Uchida, Daisuke Yamashita, Kunihiro Kamataki, Hyunwoong Seo, Naho Itagaki, Masaharu Shiratani, Naoko Ashikawa, Suguru Masuzaki, Kiyohiko Nishimura, Akio Sagara

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We measured the dependence of the collected flux of dust particles on the bias potential Δφ with respect to ground in the Large Helical Device at the National Institute of Fusion Science. This is a first step toward developing a novel method for removing dust for fusion reactors based on applying a local bias potential. The collected dust particles were classified into two kinds: spherical carbon particles smaller than 300 nm and stainless-steel flakes smaller than 1 μm. For Δφ = -70 to +70 V, the flux of spherical particles increased exponentially with increasing Δφ. The flux of flakes increased when Δφ was increased from -70 V to +30 V and it decreased at higher Δφ. These results suggest that this method is useful for removing carbon and metal dust particles from the shadow area of fusion devices using appropriate control of the local bias potential.

Original languageEnglish
Pages (from-to)S727-S730
JournalJournal of Nuclear Materials
Volume438
Issue numberSUPPL
DOIs
Publication statusPublished - Jan 1 2013

Fingerprint

Bias voltage
Dust
dust
direct current
Fluxes
Particles (particulate matter)
electric potential
Substrates
flakes
Fusion reactions
Carbon
fusion
Fusion reactors
Stainless Steel
fusion reactors
carbon
Stainless steel
Metals
stainless steels
metals

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Effects of DC substrate bias voltage on dust flux in the Large Helical Device. / Koga, Kazunori; Nishiyama, Katsushi; Morita, Yasuhiko; Uchida, Giichiro; Yamashita, Daisuke; Kamataki, Kunihiro; Seo, Hyunwoong; Itagaki, Naho; Shiratani, Masaharu; Ashikawa, Naoko; Masuzaki, Suguru; Nishimura, Kiyohiko; Sagara, Akio.

In: Journal of Nuclear Materials, Vol. 438, No. SUPPL, 01.01.2013, p. S727-S730.

Research output: Contribution to journalArticle

Koga, K, Nishiyama, K, Morita, Y, Uchida, G, Yamashita, D, Kamataki, K, Seo, H, Itagaki, N, Shiratani, M, Ashikawa, N, Masuzaki, S, Nishimura, K & Sagara, A 2013, 'Effects of DC substrate bias voltage on dust flux in the Large Helical Device', Journal of Nuclear Materials, vol. 438, no. SUPPL, pp. S727-S730. https://doi.org/10.1016/j.jnucmat.2013.01.154
Koga, Kazunori ; Nishiyama, Katsushi ; Morita, Yasuhiko ; Uchida, Giichiro ; Yamashita, Daisuke ; Kamataki, Kunihiro ; Seo, Hyunwoong ; Itagaki, Naho ; Shiratani, Masaharu ; Ashikawa, Naoko ; Masuzaki, Suguru ; Nishimura, Kiyohiko ; Sagara, Akio. / Effects of DC substrate bias voltage on dust flux in the Large Helical Device. In: Journal of Nuclear Materials. 2013 ; Vol. 438, No. SUPPL. pp. S727-S730.
@article{c8e217d770234d22b32c7e9b6b70292c,
title = "Effects of DC substrate bias voltage on dust flux in the Large Helical Device",
abstract = "We measured the dependence of the collected flux of dust particles on the bias potential Δφ with respect to ground in the Large Helical Device at the National Institute of Fusion Science. This is a first step toward developing a novel method for removing dust for fusion reactors based on applying a local bias potential. The collected dust particles were classified into two kinds: spherical carbon particles smaller than 300 nm and stainless-steel flakes smaller than 1 μm. For Δφ = -70 to +70 V, the flux of spherical particles increased exponentially with increasing Δφ. The flux of flakes increased when Δφ was increased from -70 V to +30 V and it decreased at higher Δφ. These results suggest that this method is useful for removing carbon and metal dust particles from the shadow area of fusion devices using appropriate control of the local bias potential.",
author = "Kazunori Koga and Katsushi Nishiyama and Yasuhiko Morita and Giichiro Uchida and Daisuke Yamashita and Kunihiro Kamataki and Hyunwoong Seo and Naho Itagaki and Masaharu Shiratani and Naoko Ashikawa and Suguru Masuzaki and Kiyohiko Nishimura and Akio Sagara",
year = "2013",
month = "1",
day = "1",
doi = "10.1016/j.jnucmat.2013.01.154",
language = "English",
volume = "438",
pages = "S727--S730",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "SUPPL",

}

TY - JOUR

T1 - Effects of DC substrate bias voltage on dust flux in the Large Helical Device

AU - Koga, Kazunori

AU - Nishiyama, Katsushi

AU - Morita, Yasuhiko

AU - Uchida, Giichiro

AU - Yamashita, Daisuke

AU - Kamataki, Kunihiro

AU - Seo, Hyunwoong

AU - Itagaki, Naho

AU - Shiratani, Masaharu

AU - Ashikawa, Naoko

AU - Masuzaki, Suguru

AU - Nishimura, Kiyohiko

AU - Sagara, Akio

PY - 2013/1/1

Y1 - 2013/1/1

N2 - We measured the dependence of the collected flux of dust particles on the bias potential Δφ with respect to ground in the Large Helical Device at the National Institute of Fusion Science. This is a first step toward developing a novel method for removing dust for fusion reactors based on applying a local bias potential. The collected dust particles were classified into two kinds: spherical carbon particles smaller than 300 nm and stainless-steel flakes smaller than 1 μm. For Δφ = -70 to +70 V, the flux of spherical particles increased exponentially with increasing Δφ. The flux of flakes increased when Δφ was increased from -70 V to +30 V and it decreased at higher Δφ. These results suggest that this method is useful for removing carbon and metal dust particles from the shadow area of fusion devices using appropriate control of the local bias potential.

AB - We measured the dependence of the collected flux of dust particles on the bias potential Δφ with respect to ground in the Large Helical Device at the National Institute of Fusion Science. This is a first step toward developing a novel method for removing dust for fusion reactors based on applying a local bias potential. The collected dust particles were classified into two kinds: spherical carbon particles smaller than 300 nm and stainless-steel flakes smaller than 1 μm. For Δφ = -70 to +70 V, the flux of spherical particles increased exponentially with increasing Δφ. The flux of flakes increased when Δφ was increased from -70 V to +30 V and it decreased at higher Δφ. These results suggest that this method is useful for removing carbon and metal dust particles from the shadow area of fusion devices using appropriate control of the local bias potential.

UR - http://www.scopus.com/inward/record.url?scp=84885480905&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84885480905&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2013.01.154

DO - 10.1016/j.jnucmat.2013.01.154

M3 - Article

AN - SCOPUS:84885480905

VL - 438

SP - S727-S730

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - SUPPL

ER -