H-mode threshold and confinement in helium and deuterium in ASDEX Upgrade

F. Ryter; T. Pütterich; M. Reich; A. Scarabosio; E. Wolfrum; R. Fischer; M. Gemisic Adamov; N. Hicks; B. Kurzan; C. Maggi; R. Neu; V. Rohde; G. Tardini

doi:10.1088/0029-5515/49/6/062003

H-mode threshold and confinement in helium and deuterium in ASDEX Upgrade

F. Ryter, T. Pütterich, M. Reich, A. Scarabosio, E. Wolfrum, R. Fischer, M. Gemisic Adamov, N. Hicks, B. Kurzan, C. Maggi, R. Neu, V. Rohde, G. Tardini

Max Planck Institute for Plasma Physics

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

113 Scopus citations

Abstract

In 2008, experiments have been carried out in ASDEX Upgrade to compare H-mode power threshold and confinement time in helium and deuterium. A scan in magnetic field and a wide density variation indicate that the threshold power in the two gases is very similar. The density dependence of the threshold exhibits a clear minimum. Confinement in helium is about 30% lower than in deuterium, mainly due to the reduction in the ion density caused by Z = 2 in helium.

Original language	English
Article number	062003
Journal	Nuclear Fusion
Volume	49
Issue number	6
DOIs	https://doi.org/10.1088/0029-5515/49/6/062003
State	Published - 2009
Externally published	Yes

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abstract = "In 2008, experiments have been carried out in ASDEX Upgrade to compare H-mode power threshold and confinement time in helium and deuterium. A scan in magnetic field and a wide density variation indicate that the threshold power in the two gases is very similar. The density dependence of the threshold exhibits a clear minimum. Confinement in helium is about 30% lower than in deuterium, mainly due to the reduction in the ion density caused by Z = 2 in helium.",

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T1 - H-mode threshold and confinement in helium and deuterium in ASDEX Upgrade

AU - Ryter, F.

AU - Pütterich, T.

AU - Reich, M.

AU - Scarabosio, A.

AU - Wolfrum, E.

AU - Fischer, R.

AU - Gemisic Adamov, M.

AU - Hicks, N.

AU - Kurzan, B.

AU - Maggi, C.

AU - Neu, R.

AU - Rohde, V.

AU - Tardini, G.

PY - 2009

Y1 - 2009

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AB - In 2008, experiments have been carried out in ASDEX Upgrade to compare H-mode power threshold and confinement time in helium and deuterium. A scan in magnetic field and a wide density variation indicate that the threshold power in the two gases is very similar. The density dependence of the threshold exhibits a clear minimum. Confinement in helium is about 30% lower than in deuterium, mainly due to the reduction in the ion density caused by Z = 2 in helium.

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JO - Nuclear Fusion

JF - Nuclear Fusion

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ER -

H-mode threshold and confinement in helium and deuterium in ASDEX Upgrade

Abstract

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