TY - JOUR
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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U2 - 10.1103/PhysRevLett.107.215001
DO - 10.1103/PhysRevLett.107.215001
M3 - Article
C2 - 22181888
AN - SCOPUS:81155123601
SN - 0031-9007
VL - 107
JO - Physical review letters
JF - Physical review letters
IS - 21
M1 - 215001
ER -