Interpretation of Mode Frequency Sweeping in JET and NSTX

1) Institute for Fusion Studies, University of Texas, Austin, TX 78712 2) Naval Surface Warfare Center, Indianhead Division, Indianhead, MD 20640 3) Centro de Fusao Nuclear, Associacao EURATOM/IST, Instituto Superior Tcnico, Lisboa, Portugal 4) Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, OX143DB, UK 5) Princeton Plasma Physics Laboratory, Princeton, NJ 08543-0451 6) Comp X, Del Mar, CA 92014-5672 7) University of California, Irvine; Irvine, CA 92623-9557 8) Alfven Laboratory, KTH, Euratom-VR Association, Sweden 9) University of York, Heslington, York, YO105DD, UK 10) See annex of Watkins M.L., et al, 2006 Proc. 21st Int. Conf. on FusionEnergy 2006 (Chengdu 2006) (Vienna: IAEA) OV/1-3