Ripple induced fast ion loss and related effects in JT-60U

K. Tobita; K. Tani; Y. Kusama; T. Nishitani; Y. Ikeda; Y. Neyatani; S. V. Konovalov; M. Kikuchi; Y. Koide; K. Hamamatsu; H. Takeuchi; T. Fujii

doi:10.1088/0029-5515/35/12/I20

Ripple induced fast ion loss and related effects in JT-60U

K. Tobita, K. Tani, Y. Kusama, T. Nishitani, Y. Ikeda, Y. Neyatani, S. V. Konovalov, M. Kikuchi, Y. Koide, K. Hamamatsu, H. Takeuchi, T. Fujii

ENG - Quantum Science and Energy Engineering

Japan Atomic Energy Agency

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

66 Citations (Scopus)

Abstract

Experiments have been carried out in JT-60U to verify the modelling of fast ion ripple transport. The ripple induced loss was estimated from the neutron decay following neutral beam pulse injection and the loss related heat load on the first wall. Comparison of the lost fraction and the hot spot positions between measurements and orbit following Monte Carlo calculations exhibited good agreement, indicating that the ripple transport governing fast ion losses is explained within the framework of existing theory. Neutral beam heating experiments in JT-60U also indicate that H modes free of ELMs are still obtainable for ripple amplitudes of up to 2.2%.

Original language	English
Article number	I20
Pages (from-to)	1585-1591
Number of pages	7
Journal	Nuclear Fusion
Volume	35
Issue number	12
DOIs	https://doi.org/10.1088/0029-5515/35/12/I20
Publication status	Published - 1995

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title = "Ripple induced fast ion loss and related effects in JT-60U",

abstract = "Experiments have been carried out in JT-60U to verify the modelling of fast ion ripple transport. The ripple induced loss was estimated from the neutron decay following neutral beam pulse injection and the loss related heat load on the first wall. Comparison of the lost fraction and the hot spot positions between measurements and orbit following Monte Carlo calculations exhibited good agreement, indicating that the ripple transport governing fast ion losses is explained within the framework of existing theory. Neutral beam heating experiments in JT-60U also indicate that H modes free of ELMs are still obtainable for ripple amplitudes of up to 2.2%.",

author = "K. Tobita and K. Tani and Y. Kusama and T. Nishitani and Y. Ikeda and Y. Neyatani and Konovalov, {S. V.} and M. Kikuchi and Y. Koide and K. Hamamatsu and H. Takeuchi and T. Fujii",

year = "1995",

doi = "10.1088/0029-5515/35/12/I20",

language = "English",

volume = "35",

pages = "1585--1591",

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TY - JOUR

T1 - Ripple induced fast ion loss and related effects in JT-60U

AU - Tobita, K.

AU - Tani, K.

AU - Kusama, Y.

AU - Nishitani, T.

AU - Ikeda, Y.

AU - Neyatani, Y.

AU - Konovalov, S. V.

AU - Kikuchi, M.

AU - Koide, Y.

AU - Hamamatsu, K.

AU - Takeuchi, H.

AU - Fujii, T.

PY - 1995

Y1 - 1995

N2 - Experiments have been carried out in JT-60U to verify the modelling of fast ion ripple transport. The ripple induced loss was estimated from the neutron decay following neutral beam pulse injection and the loss related heat load on the first wall. Comparison of the lost fraction and the hot spot positions between measurements and orbit following Monte Carlo calculations exhibited good agreement, indicating that the ripple transport governing fast ion losses is explained within the framework of existing theory. Neutral beam heating experiments in JT-60U also indicate that H modes free of ELMs are still obtainable for ripple amplitudes of up to 2.2%.

AB - Experiments have been carried out in JT-60U to verify the modelling of fast ion ripple transport. The ripple induced loss was estimated from the neutron decay following neutral beam pulse injection and the loss related heat load on the first wall. Comparison of the lost fraction and the hot spot positions between measurements and orbit following Monte Carlo calculations exhibited good agreement, indicating that the ripple transport governing fast ion losses is explained within the framework of existing theory. Neutral beam heating experiments in JT-60U also indicate that H modes free of ELMs are still obtainable for ripple amplitudes of up to 2.2%.

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SP - 1585

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JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 12

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ER -

Ripple induced fast ion loss and related effects in JT-60U

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