Fast ion collective Thomson scattering diagnostic for ITER: Design elements

Erekle Tsakadze; Henrik Bindslev; Søren Bang Korsholm; A.W. Larsen; Fernando Meo; Poul Michelsen; Susanne Michelsen; Anders Henry Nielsen; Søren Robert Nimb; Bent Lauritzen; Erik Nonbøl; Nicolas Dubois

Fast ion collective Thomson scattering diagnostic for ITER: Design elements

Erekle Tsakadze, Henrik Bindslev, Søren Bang Korsholm, A.W. Larsen, Fernando Meo, Poul Michelsen, Susanne Michelsen, Anders Henry Nielsen, Søren Robert Nimb, Bent Lauritzen, Erik Nonbøl, Nicolas Dubois

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

Abstract

The proposed fast ion collective Thomson scattering (CTS) diagnostic system for ITER provides the unique capability of measuring the temporally and spatially resolved velocity distribution of the confined fast ions and fusion alpha particles in a burning ITER plasma. The present paper describes the status of the iteration toward the detailed design of the ITER fast ion CTS diagnostic and explains in detail a number of essential considerations and challenges. The diagnostic consists of two separate receiving systems. One system measures the fast ion velocity component in the direction near perpendicular, and the other measures the component near parallel to the magnetic field. Each system has a high-power probe beam at an operating frequency of 60 GHz and a receiver unit. In order to prevent neutron damage to moveable parts, the geometry of the probes and receivers is fixed An array of receivers in each receiving unit ensures simultaneous measurements in multiple scattering volumes. The latter receiving system (resolving the parallel component) is located on the high field side (HFS) of the plasma, and this constitutes a significant challenge. This HFS receiving unit has been central in the studies, and new HFS receiver mock-up measurements are presented as well as neutron flux calculations of the influence of the increased slot height.

Original language	English
Journal	Fusion Science and Technology
Volume	53
Issue number	1
Pages (from-to)	69-76
ISSN	1536-1055
Publication status	Published - 2008
Event	14th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating - Santorini Island, Greece Duration: 9 May 2006 → 12 May 2006

Conference

Conference	14th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
Country	Greece
City	Santorini Island
Period	09/05/2006 → 12/05/2006

Cite this

Tsakadze, E., Bindslev, H., Korsholm, S. B., Larsen, A. W., Meo, F., Michelsen, P., ... Dubois, N. (2008). Fast ion collective Thomson scattering diagnostic for ITER: Design elements. Fusion Science and Technology, 53(1), 69-76.

Tsakadze, Erekle ; Bindslev, Henrik ; Korsholm, Søren Bang ; Larsen, A.W. ; Meo, Fernando ; Michelsen, Poul ; Michelsen, Susanne ; Nielsen, Anders Henry ; Nimb, Søren Robert ; Lauritzen, Bent ; Nonbøl, Erik ; Dubois, Nicolas. / Fast ion collective Thomson scattering diagnostic for ITER: Design elements. In: Fusion Science and Technology. 2008 ; Vol. 53, No. 1. pp. 69-76.

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abstract = "The proposed fast ion collective Thomson scattering (CTS) diagnostic system for ITER provides the unique capability of measuring the temporally and spatially resolved velocity distribution of the confined fast ions and fusion alpha particles in a burning ITER plasma. The present paper describes the status of the iteration toward the detailed design of the ITER fast ion CTS diagnostic and explains in detail a number of essential considerations and challenges. The diagnostic consists of two separate receiving systems. One system measures the fast ion velocity component in the direction near perpendicular, and the other measures the component near parallel to the magnetic field. Each system has a high-power probe beam at an operating frequency of 60 GHz and a receiver unit. In order to prevent neutron damage to moveable parts, the geometry of the probes and receivers is fixed An array of receivers in each receiving unit ensures simultaneous measurements in multiple scattering volumes. The latter receiving system (resolving the parallel component) is located on the high field side (HFS) of the plasma, and this constitutes a significant challenge. This HFS receiving unit has been central in the studies, and new HFS receiver mock-up measurements are presented as well as neutron flux calculations of the influence of the increased slot height.",

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Fast ion collective Thomson scattering diagnostic for ITER: Design elements. / Tsakadze, Erekle; Bindslev, Henrik; Korsholm, Søren Bang; Larsen, A.W.; Meo, Fernando; Michelsen, Poul; Michelsen, Susanne; Nielsen, Anders Henry ; Nimb, Søren Robert ; Lauritzen, Bent ; Nonbøl, Erik; Dubois, Nicolas.

In: Fusion Science and Technology, Vol. 53, No. 1, 2008, p. 69-76.

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

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AU - Tsakadze, Erekle

AU - Bindslev, Henrik

AU - Korsholm, Søren Bang

AU - Larsen, A.W.

AU - Meo, Fernando

AU - Michelsen, Poul

AU - Michelsen, Susanne

AU - Nielsen, Anders Henry

AU - Nimb, Søren Robert

AU - Lauritzen, Bent

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AU - Dubois, Nicolas

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N2 - The proposed fast ion collective Thomson scattering (CTS) diagnostic system for ITER provides the unique capability of measuring the temporally and spatially resolved velocity distribution of the confined fast ions and fusion alpha particles in a burning ITER plasma. The present paper describes the status of the iteration toward the detailed design of the ITER fast ion CTS diagnostic and explains in detail a number of essential considerations and challenges. The diagnostic consists of two separate receiving systems. One system measures the fast ion velocity component in the direction near perpendicular, and the other measures the component near parallel to the magnetic field. Each system has a high-power probe beam at an operating frequency of 60 GHz and a receiver unit. In order to prevent neutron damage to moveable parts, the geometry of the probes and receivers is fixed An array of receivers in each receiving unit ensures simultaneous measurements in multiple scattering volumes. The latter receiving system (resolving the parallel component) is located on the high field side (HFS) of the plasma, and this constitutes a significant challenge. This HFS receiving unit has been central in the studies, and new HFS receiver mock-up measurements are presented as well as neutron flux calculations of the influence of the increased slot height.

AB - The proposed fast ion collective Thomson scattering (CTS) diagnostic system for ITER provides the unique capability of measuring the temporally and spatially resolved velocity distribution of the confined fast ions and fusion alpha particles in a burning ITER plasma. The present paper describes the status of the iteration toward the detailed design of the ITER fast ion CTS diagnostic and explains in detail a number of essential considerations and challenges. The diagnostic consists of two separate receiving systems. One system measures the fast ion velocity component in the direction near perpendicular, and the other measures the component near parallel to the magnetic field. Each system has a high-power probe beam at an operating frequency of 60 GHz and a receiver unit. In order to prevent neutron damage to moveable parts, the geometry of the probes and receivers is fixed An array of receivers in each receiving unit ensures simultaneous measurements in multiple scattering volumes. The latter receiving system (resolving the parallel component) is located on the high field side (HFS) of the plasma, and this constitutes a significant challenge. This HFS receiving unit has been central in the studies, and new HFS receiver mock-up measurements are presented as well as neutron flux calculations of the influence of the increased slot height.

KW - Energiteknologier på vej

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