Effect of the two-close-frequency heating to the extracted ion beam and to the X-ray flux emitted by the ECR plasma. (12th December 2018) - Rácz, R.; Biri, S.; Perduk, Z.; Pálinkás, J.; Mascali, D.; Mazzaglia, M.; Naselli, E.; Torrisi, G.; Castro, G.; Celona, L.; Gammino, S.; Galata, A.