3D MAPPING OF ION VELOCITIES IN AN ECR PLASMA REACTOR BY LIF, DOPPLER SHIFT MEASUREMENTS T. NAKANO, J. DEROUARD, R.A. GOTTSCHO, N. SADEGHI and D.J. TREVER J. Phys. IV France, 01 C7 (1991) C7-560 DOI: 10.1051/jp4:19917147