It was a Danish scientist, Henrik Svensmark, who posited the role of cosmic rays in cloud formation and the role of changes in solar magnetism in changing the amount of cosmic radiation hitting the earth’s atmosphere as the causal mechanism linking the sunspot cycle to global temperature. In fact, the phenomenon CERN just confirmed is called “the Svensmark effect”.
I think you may be confusing him with a Hungarian scientist, Ferenc M. Miskolczi, who also dealt a significant blow to the AGW alarmism by recalculation the solution to the differential equations governing the greenhouse effect with realistic boundary conditions (instead of the simplifying assumption of a “semi-infinite” atmosphere used since about the 1920’s and used in all models that “support” the AGW theory). His solutions agreed with observation on both Earth and Mars without any fudging, and (here’s what’s deadly to climate alarmism, albeit not to the possibility of human causation of global warming) predict that run-away greenhouse warming is impossible: the greenhouse effect is self-limiting, even without other negative feedback mechanisms.
See my posts 31 and 32.