Lower Hybrid Wave Damping on Alpha Particles in ITER*

An alpha particle source has been enabled in CQL3D-FOW[1], and this provides time-dependent nonthermal distributions for self-consistent damping of lower hybrid waves. Using the conventional ray damping in CQL3D[2], i\sout{on cyclotron damping at harmonics 125 to 160 are examined in preliminary work in an ITER equilibrium. The results are to be compared with alternative calculations of the ion damping [3,4,5], and will provide a basis for future work on alpha-particle channeling [6] for which CQL3D-FOW is well suited.} [1] Yu. V. Petrov and R.W. Harvey, this APS/DPP meeting (2016) [2] CQL3D Manual, http://www.compxco.com/cql3d.html [3] C.F.F. Karney, Phys. Fluids , 2188 (1979) [4] J. Schuss et al., Nucl. Fusion , 201 (1983) \sout{[5] P.T. Bonoli and M. Porkolab, Nucl. Fusion , 1341 ()} \sout{[6] }\sout{N.J. Fisch and J.-M. Rax, Nucl. Fusion, 549 (1992)}