As the air that's routed above makes its way around the nose of the wing, it experiences centripetal acceleration, the force you also feel in a sharply turning car.
When you take that uniform solution and you want to isolate your plasma, if you put into the machine and then the centripetal force forces the densest thing to the outside, that's why it's angled.
As he reached the platform, with spring twilight gilding the rails and the glass in the slot machines, he began to feel that the station, the hospital, was hovering between being centripetal and centrifugal.