Rick Nebel On The Limited Results
Here's what we know and what we don't know:Also getting press elsewhere (Glenn Reynolds among others).
1. We don't have the spatial resolution of the density to see if the cusps are quasi-neutral on the WB-7
2. In one-D simulations the plasma edge (which corresponds to the cusp regions) is not quasi-neutral. Therefore, if the cusps are quasi-neutral it must be a multidimensional effect.
3. Energy confinement on the WB-7 exceeds the classical predictions (wiffleball based on the electron gyro-radius) by a large factor.
Our conclusion is that both the wiffleball and the cusp recycle are working at a reasonable level.