Static and dynamic properties of wall recycling in TRIAM-1M

M. Sakamoto; H. Nakashima; S. Kawasaki; A. Iyomasa; S. V. Kulkarni; Makoto Hasegawa; Eriko Jotaki; H. Zushi; Kazuo Nakamura; Kazuaki Hanada; Sanae Itoh

doi:10.1016/S0022-3115(02)01390-9

Static and dynamic properties of wall recycling in TRIAM-1M

M. Sakamoto, H. Nakashima, S. Kawasaki, A. Iyomasa, S. V. Kulkarni, Makoto Hasegawa, Eriko Jotaki, H. Zushi, Kazuo Nakamura, Kazuaki Hanada, Sanae Itoh

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

A large difference between properties of wall recycling in the continuous gas feed case (i.e. static condition) and the additional gas puff case (i.e. dynamic condition) has been observed. In the static condition, the effective particle confinement time, τ_p*, increases almost linearly to about 10 s during the 1 min discharge. In the dynamic condition, τ_p* is 0.2-0.3 s during the 1 min discharge. This difference of τ_p* is also confirmed in the ultra-long discharge. τ_p* in the static condition becomes ̃100 s before the global balance between particle absorption and release of the wall is achieved at t ̃ 30 min. τ_p* in the dynamic condition is, however, still on the order of ~0.3 s. The large difference between τ_p* in the static and dynamic conditions is attributed to a reduction in the recycling coefficient due to enhanced wall pumping resulting from the gas puff.

Original language	English
Pages (from-to)	519-523
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	313-316
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/S0022-3115(02)01390-9
Publication status	Published - Mar 1 2003
Event	Plasma - Surface Interactions in Controlled Fusion Devices - Gifu, Japan Duration: May 26 2002 → May 31 2002

All Science Journal Classification (ASJC) codes

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

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10.1016/S0022-3115(02)01390-9

Cite this

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title = "Static and dynamic properties of wall recycling in TRIAM-1M",

abstract = "A large difference between properties of wall recycling in the continuous gas feed case (i.e. static condition) and the additional gas puff case (i.e. dynamic condition) has been observed. In the static condition, the effective particle confinement time, τp*, increases almost linearly to about 10 s during the 1 min discharge. In the dynamic condition, τp* is 0.2-0.3 s during the 1 min discharge. This difference of τp* is also confirmed in the ultra-long discharge. τp* in the static condition becomes{\~ }100 s before the global balance between particle absorption and release of the wall is achieved at t{\~ } 30 min. τp* in the dynamic condition is, however, still on the order of ~0.3 s. The large difference between τp* in the static and dynamic conditions is attributed to a reduction in the recycling coefficient due to enhanced wall pumping resulting from the gas puff.",

author = "M. Sakamoto and H. Nakashima and S. Kawasaki and A. Iyomasa and Kulkarni, {S. V.} and Makoto Hasegawa and Eriko Jotaki and H. Zushi and Kazuo Nakamura and Kazuaki Hanada and Sanae Itoh",

year = "2003",

month = mar,

day = "1",

doi = "10.1016/S0022-3115(02)01390-9",

language = "English",

volume = "313-316",

pages = "519--523",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

number = "SUPPL.",

note = "Plasma - Surface Interactions in Controlled Fusion Devices ; Conference date: 26-05-2002 Through 31-05-2002",

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TY - JOUR

T1 - Static and dynamic properties of wall recycling in TRIAM-1M

AU - Sakamoto, M.

AU - Nakashima, H.

AU - Kawasaki, S.

AU - Iyomasa, A.

AU - Kulkarni, S. V.

AU - Hasegawa, Makoto

AU - Jotaki, Eriko

AU - Zushi, H.

AU - Nakamura, Kazuo

AU - Hanada, Kazuaki

AU - Itoh, Sanae

PY - 2003/3/1

Y1 - 2003/3/1

N2 - A large difference between properties of wall recycling in the continuous gas feed case (i.e. static condition) and the additional gas puff case (i.e. dynamic condition) has been observed. In the static condition, the effective particle confinement time, τp*, increases almost linearly to about 10 s during the 1 min discharge. In the dynamic condition, τp* is 0.2-0.3 s during the 1 min discharge. This difference of τp* is also confirmed in the ultra-long discharge. τp* in the static condition becomes ̃100 s before the global balance between particle absorption and release of the wall is achieved at t ̃ 30 min. τp* in the dynamic condition is, however, still on the order of ~0.3 s. The large difference between τp* in the static and dynamic conditions is attributed to a reduction in the recycling coefficient due to enhanced wall pumping resulting from the gas puff.

AB - A large difference between properties of wall recycling in the continuous gas feed case (i.e. static condition) and the additional gas puff case (i.e. dynamic condition) has been observed. In the static condition, the effective particle confinement time, τp*, increases almost linearly to about 10 s during the 1 min discharge. In the dynamic condition, τp* is 0.2-0.3 s during the 1 min discharge. This difference of τp* is also confirmed in the ultra-long discharge. τp* in the static condition becomes ̃100 s before the global balance between particle absorption and release of the wall is achieved at t ̃ 30 min. τp* in the dynamic condition is, however, still on the order of ~0.3 s. The large difference between τp* in the static and dynamic conditions is attributed to a reduction in the recycling coefficient due to enhanced wall pumping resulting from the gas puff.

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U2 - 10.1016/S0022-3115(02)01390-9

DO - 10.1016/S0022-3115(02)01390-9

M3 - Conference article

AN - SCOPUS:17144455178

SN - 0022-3115

VL - 313-316

SP - 519

EP - 523

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - SUPPL.

T2 - Plasma - Surface Interactions in Controlled Fusion Devices

Y2 - 26 May 2002 through 31 May 2002

ER -

Static and dynamic properties of wall recycling in TRIAM-1M

Abstract

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