Analysis of High-Resoluti on ASDEX Upgrade Edge Plasma Profiles

Summary and conclusionsHigh resolution edge profiles have beenmeasured at ASDEX Upgrade by Thomsonscattering for a small number of dischargescovering nevertheless a broad range of fusionrelevant scenarios. The profiles have beenanalysed first by filtering and inspection, thenby fitting 1.5 d analytic transport models withfree separatrix position using standard and Bayesian statistics and finally by an automatic profileanalysis version of the 2-dimensional B2.5 code. A strong radial transport correlation across theseparatrix into the power conducting layer seems to exist, which causes a striking similaritybetween hot SOL and pedestal gradient scaling. References[1] O. Gruber et al., Plasma Phys. Contr. Fusion 39 (1997) B19[2] V. Dose, W. von der Linden; 'Outlier tolerant parameter estimation', Proc. MaxEnt'98, Garching, July 27-31,1998 (to appear in 'Maximum Entropy and Bayesian Methods', Kluwer Academic Publishers, Dordrecht, 1999)[3] J. Schweinzer et al., J. Nucl. Mater. 266-269 (1999) 934[4] M. Keilhacker et al., Physica Scripta T2/2 (1982) 443[5] J. Neuhauser et al., 'Recent ASDEX Upgrade edge-divertor results', 6th ITER Divertor Expert Goup Meeting,Garching, June 16-20, 1997 (unpublished)[6] B. Scott, Plasma Phys. Contr. Fusion 39 (1997) 471[7] D.P. Coster et al., J. Nucl. Mater. 266-269 (1999) 804[8] W. Suttrop et al., J. Nucl. Mater. 266-269 (1999) 118[9] K. McCormick et al., J. Nucl. Mater. 266-269 (1999) 99[10] H.S. Bosch et al., J. Nucl. Mater. 220-222 (1995) 558