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The linear stability of Alfv\'en eigenmodes in the presence of fusion-bornalpha particles is thoroughly assessed for two variants of an ITER baselinescenario, which differ significantly in their core and pedestal temperatures. Asystematic approach is used that considers all possible eigenmodes for a givenmagnetic equilibrium and determines their growth rates due to alpha-particledrive and Landau damping on fuel ions, helium ashes and electrons. Thisextensive stability study is efficiently conducted through the use of aspecialized workflow that profits from the performance of the hybrid MHDdrift-kinetic code $\mbox{CASTOR-K}$ (Borba D. and Kerner W. 1999 J. Comput.Phys. ${\bf 153}$ 101; Nabais F. ${\it et\,al}$ 2015 Plasma Sci. Technol. ${\bf17}$ 89), which can rapidly evaluate the linear growth rate of an eigenmode. Itis found that the fastest growing instabilities in the aforementioned ITERscenario are core-localized, low-shear toroidal Alfv\'en eigenmodes. Thelargest growth-rates occur in the scenario variant with higher coretemperatures, which has the highest alpha-particle density and densitygradient, for eigenmodes with toroidal mode numbers $n\approx30$. Althoughthese eigenmodes suffer significant radiative damping, which is also evaluated,their growth rates remain larger than those of the most unstable eigenmodesfound in the variant of the ITER baseline scenario with lower coretemperatures, which have $n\approx15$ and are not affected by radiativedamping.

Comprehensive evaluation of the linear stability of Alfv\'en eigenmodes driven by alpha particles in an ITER baseline scenario