Abstract
Two fusion reactor problems, removal of helium ash and fuel (tritium) injection, can be solved using the concept of “drift island motion.” The motion of a drift island is an indicator of the broadening of the resonant trajectory of a charged particle guiding center. This trajectory broadening occurs if two conditions are satisfied. First, the drift pitch angle of the particle is equal to the resonance values i*=n/m, where n and m are the “wave numbers” of the perturbing magnetic field. Second, the drift pitch angle i*=n/m “moves” over the plasma cross section as the particle moves. This displacement is caused by a slow change in the helical magnetic field with time as the particle moves. It is shown that this effect may occur in a fusion reactor with an l=3 helical winding and may be used for tritium ion injection.
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Pis’ma Zh. Tekh. Fiz. 25, 5–13 (January 26, 1999)
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Shishkin, A.A., Motojima, O. & Polunovskii, É.I. Broadening of the particle resonance drift trajectory and tritium injection into a fusion reactor with an I=3 helical winding. Tech. Phys. Lett. 25, 43–46 (1999). https://doi.org/10.1134/1.1262349
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DOI: https://doi.org/10.1134/1.1262349