The reactor functions as a neutron source with a flux of 1012 n/cm2/s at the core center.
The oriented crystalline lamellae are even found in positions that are very close to the core center.
Measurements indicate the friction velocity is uniform over >50% of the radial distance from the core center.
Here, FeS would precipitate either at the CMB, in the core, or at the core center, depending on the sulfur concentration and the temperature profile.
Depending on the core temperature profile and the pressure range considered, FeS crystallizes either in the core center or close to the core mantle boundary.
"So I think integrating that into the core center of cities, I think will be a really exciting policy topic in the years to come," Erlich said.
Depending on the sulfur content, for Ganymede, FeS starts to crystallize in the core or at the CMB and for the Moon, FeS starts to crystallize in the core or in the core center.
If Fe3S crystallizes first in the core center (see Fig. 1g), which is possible for a conductive temperature profile, the dense crystals remain in the center to form an inner core, as in the conventional Earth scenario.
FeS floating, where FeS crystals form first in the core center and rise, is considered a viable mechanism for dynamo action in Ganymede (Hauck et al. 2006; Bland et al. 2008; Zhan and Schubert 2012).
The former authors suggested that the power requirement for dynamo action can only be satisfied if the sulfur mass fraction in Ganymede's core is either very low (<3 wt.%, with freezing starting at the core center) or very high (>22.5 wt.%; i.e., solidification of FeS deep within the core).
The core center value proposition has to be there.
