Inter-ELM power decay length for JET and ASDEX Upgrade: Measurement and comparison with heuristic drift-based model

T. Eich; B. Sieglin; A. Scarabosio; W. Fundamenski; Robert James Goldston; A. Herrmann

doi:10.1103/PhysRevLett.107.215001

Inter-ELM power decay length for JET and ASDEX Upgrade: Measurement and comparison with heuristic drift-based model

T. Eich
, B. Sieglin
, A. Scarabosio
, W. Fundamenski
, Robert James Goldston
, A. Herrmann

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

469 Scopus citations

Abstract

Experimental measurements of the SOL power decay length (λ_q) estimated from analysis of fully attached divertor heat load profiles from two tokamaks, JET and ASDEX Upgrade, are presented. Data was measured by means of infrared thermography. An empirical scaling reveals parametric dependency λ_q in mm=0.73BT-0.78qcyl1.2PSOL0.1Rgeo0, where B_T(T) describes the toroidal magnetic field, q_cyl the cylindrical safety factor, P_SOL(MW) the power crossing the separatrix and R_geo(m) the major radius of the device. A comparison of these measurements to a heuristic particle drift-based model shows satisfactory agreement in both absolute magnitude and scaling. Extrapolation to ITER gives λ_q1mm.

Original language	English (US)
Article number	215001
Journal	Physical review letters
Volume	107
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.107.215001
State	Published - Nov 14 2011

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.107.215001

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title = "Inter-ELM power decay length for JET and ASDEX Upgrade: Measurement and comparison with heuristic drift-based model",

abstract = "Experimental measurements of the SOL power decay length (λq) estimated from analysis of fully attached divertor heat load profiles from two tokamaks, JET and ASDEX Upgrade, are presented. Data was measured by means of infrared thermography. An empirical scaling reveals parametric dependency λq in mm=0.73BT-0.78qcyl1.2PSOL0.1Rgeo0, where BT(T) describes the toroidal magnetic field, qcyl the cylindrical safety factor, PSOL(MW) the power crossing the separatrix and Rgeo(m) the major radius of the device. A comparison of these measurements to a heuristic particle drift-based model shows satisfactory agreement in both absolute magnitude and scaling. Extrapolation to ITER gives λq1mm.",

author = "T. Eich and B. Sieglin and A. Scarabosio and W. Fundamenski and Goldston, \{Robert James\} and A. Herrmann",

year = "2011",

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doi = "10.1103/PhysRevLett.107.215001",

language = "English (US)",

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T1 - Inter-ELM power decay length for JET and ASDEX Upgrade

T2 - Measurement and comparison with heuristic drift-based model

AU - Eich, T.

AU - Sieglin, B.

AU - Scarabosio, A.

AU - Fundamenski, W.

AU - Goldston, Robert James

AU - Herrmann, A.

PY - 2011/11/14

Y1 - 2011/11/14

N2 - Experimental measurements of the SOL power decay length (λq) estimated from analysis of fully attached divertor heat load profiles from two tokamaks, JET and ASDEX Upgrade, are presented. Data was measured by means of infrared thermography. An empirical scaling reveals parametric dependency λq in mm=0.73BT-0.78qcyl1.2PSOL0.1Rgeo0, where BT(T) describes the toroidal magnetic field, qcyl the cylindrical safety factor, PSOL(MW) the power crossing the separatrix and Rgeo(m) the major radius of the device. A comparison of these measurements to a heuristic particle drift-based model shows satisfactory agreement in both absolute magnitude and scaling. Extrapolation to ITER gives λq1mm.

AB - Experimental measurements of the SOL power decay length (λq) estimated from analysis of fully attached divertor heat load profiles from two tokamaks, JET and ASDEX Upgrade, are presented. Data was measured by means of infrared thermography. An empirical scaling reveals parametric dependency λq in mm=0.73BT-0.78qcyl1.2PSOL0.1Rgeo0, where BT(T) describes the toroidal magnetic field, qcyl the cylindrical safety factor, PSOL(MW) the power crossing the separatrix and Rgeo(m) the major radius of the device. A comparison of these measurements to a heuristic particle drift-based model shows satisfactory agreement in both absolute magnitude and scaling. Extrapolation to ITER gives λq1mm.

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DO - 10.1103/PhysRevLett.107.215001

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Inter-ELM power decay length for JET and ASDEX Upgrade: Measurement and comparison with heuristic drift-based model

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