However , in the presence of a non-ideal wall , the slowly growing RWM is unstable .
The spheromak requires wall stabilization to avoid the low - m , n tilt and shift modes , and possibly bending modes .
In the presence of a non-ideal wall , the slowly growing RWM is unstable .
The spheromak requires wall stabilization to avoid the low - m , n tilt and shift modes , and possibly bending modes .