1. Fast ion generation and bulk plasma heating with three-ion ICRF scenarios
- Author
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J. Ongena, Ye. O. Kazakov, R. J. Dumont, E. Lerche, A. M. Messiaen, and D. Van Eester
- Subjects
Range (particle radiation) ,Tokamak ,Cyclotron ,chemistry.chemical_element ,Plasma ,Electromagnetic radiation ,law.invention ,Ion ,chemistry ,Physics::Plasma Physics ,law ,Atomic physics ,Beryllium ,Ion cyclotron resonance - Abstract
Launching electromagnetic waves in the ion cyclotron range of frequencies (ICRF) is an efficient method of plasma heating, actively employed in most of fusion machines. ICRF has a number of important supplementary applications, including the generation of high-energy ions. In this paper, we discuss a new set of three-ion ICRF scenarios and the prospect of their use as a dedicated tool for fast ion generation in tokamaks and stellarators. A distinct feature of these scenarios is a strong absorption efficiency possible at very low concentrations of resonant minority ions (∼ 1% or even below). Such concentration levels are typical for impurities contaminating fusion plasmas. An alternative ICRF scenario for maximizing the efficiency of bulk D-T ion heating is suggested for JET and ITER tokamaks, which is based on three-ion ICRF heating of intrinsic Beryllium impurities.
- Published
- 2015