Comparison of O-ICR wall conditionings for limiter configuration in HT-7 and divertor one in EAST

J. S. Hu; J. G. Li; Y. P. Zhao

doi:10.1016/j.jnucmat.2009.01.238

Comparison of O-ICR wall conditionings for limiter configuration in HT-7 and divertor one in EAST

J. S. Hu
, J. G. Li
, Y. P. Zhao

School of Electrical Engineering

CAS - Institute of Plasma Physics

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

5 Scopus citations

Abstract

Ion cyclotron resonance discharge-associated oxidation (He/O-ICR) wall conditioning was successfully carried out on full metallic material walls for a divertor configuration in EAST. Within a range of He/O-ICR parameters (5-20 kW, 1.2-7 × 10^-2 Pa) in EAST, the highest removal rates (7.8 × 10²² H-atoms/h, 4.2 × 10²² C-atoms/h) were obtained with 20 kW and 7 × 10^-2 Pa He/O-ICR. These rates are about 10 times higher than those in HT-7. Oxygen retention rates were lower than HT-7 by a factor of >10. Results of O-ICR cleanings in both EAST and HT-7 showed that power density, working pressure, plasma-facing area and materials, and pumping speed are the main factors influencing the co-deposit removal rates during O-ICR wall conditioning.

Original language	English
Pages (from-to)	929-933
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	390-391
Issue number	1
DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.238
State	Published - 15 Jun 2009

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10.1016/j.jnucmat.2009.01.238

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title = "Comparison of O-ICR wall conditionings for limiter configuration in HT-7 and divertor one in EAST",

abstract = "Ion cyclotron resonance discharge-associated oxidation (He/O-ICR) wall conditioning was successfully carried out on full metallic material walls for a divertor configuration in EAST. Within a range of He/O-ICR parameters (5-20 kW, 1.2-7 {\texttimes} 10-2 Pa) in EAST, the highest removal rates (7.8 {\texttimes} 1022 H-atoms/h, 4.2 {\texttimes} 1022 C-atoms/h) were obtained with 20 kW and 7 {\texttimes} 10-2 Pa He/O-ICR. These rates are about 10 times higher than those in HT-7. Oxygen retention rates were lower than HT-7 by a factor of >10. Results of O-ICR cleanings in both EAST and HT-7 showed that power density, working pressure, plasma-facing area and materials, and pumping speed are the main factors influencing the co-deposit removal rates during O-ICR wall conditioning.",

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T1 - Comparison of O-ICR wall conditionings for limiter configuration in HT-7 and divertor one in EAST

AU - Hu, J. S.

AU - Li, J. G.

AU - Zhao, Y. P.

PY - 2009/6/15

Y1 - 2009/6/15

N2 - Ion cyclotron resonance discharge-associated oxidation (He/O-ICR) wall conditioning was successfully carried out on full metallic material walls for a divertor configuration in EAST. Within a range of He/O-ICR parameters (5-20 kW, 1.2-7 × 10-2 Pa) in EAST, the highest removal rates (7.8 × 1022 H-atoms/h, 4.2 × 1022 C-atoms/h) were obtained with 20 kW and 7 × 10-2 Pa He/O-ICR. These rates are about 10 times higher than those in HT-7. Oxygen retention rates were lower than HT-7 by a factor of >10. Results of O-ICR cleanings in both EAST and HT-7 showed that power density, working pressure, plasma-facing area and materials, and pumping speed are the main factors influencing the co-deposit removal rates during O-ICR wall conditioning.

AB - Ion cyclotron resonance discharge-associated oxidation (He/O-ICR) wall conditioning was successfully carried out on full metallic material walls for a divertor configuration in EAST. Within a range of He/O-ICR parameters (5-20 kW, 1.2-7 × 10-2 Pa) in EAST, the highest removal rates (7.8 × 1022 H-atoms/h, 4.2 × 1022 C-atoms/h) were obtained with 20 kW and 7 × 10-2 Pa He/O-ICR. These rates are about 10 times higher than those in HT-7. Oxygen retention rates were lower than HT-7 by a factor of >10. Results of O-ICR cleanings in both EAST and HT-7 showed that power density, working pressure, plasma-facing area and materials, and pumping speed are the main factors influencing the co-deposit removal rates during O-ICR wall conditioning.

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U2 - 10.1016/j.jnucmat.2009.01.238

DO - 10.1016/j.jnucmat.2009.01.238

M3 - 文章

AN - SCOPUS:67349257985

SN - 0022-3115

VL - 390-391

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EP - 933

JO - Journal of Nuclear Materials

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IS - 1

ER -

Comparison of O-ICR wall conditionings for limiter configuration in HT-7 and divertor one in EAST

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