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Quasi-optical grill launching of lower-hybrid waves for a linearly increasing plasma density

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6 Author(s)
R. Borghi ; Dipartimento di Ingegneria Elettronica, Rome Univ., Italy ; F. Frezza ; G. Gerosa ; M. Santarsiero
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An analysis of quasi-optical grills for lower-hybrid waves for heating and current drive purposes is presented. The tokamak plasma density versus the abscissa entering the plasma is assumed to behave like a step and a subsequent ramp. The study is performed by means of a two-dimensional formulation employing cylindrical waves. A detailed numerical analysis is presented, which allows us to show results for different configurations useful in practical cases and comparisons with the constant-density case

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IEEE Transactions on Plasma Science  (Volume:26 ,  Issue: 4 )