MAGNET SHIELDING

[Low-Q]

To be honest, I didn't understand what you said...

So, what will be the behavior of the ball? Passes the Halbach array a little and then is attracted back? Don't pass the Halbach array and gets stuck just in front of the extremity of the array?

In order to have "stable" magnets, all the flux have to return to the opposite pole. This means there is a balance in magnetic "amount" on each side of a permanent magnet - even for complex arranged magnets. This balance is constant unless you you power to demagnetize or magnetize a permanent magnet. Balance means in short "No work". It is stable, nothing happens.
As long permanent magnets are in balance, you cannot make things work. Many attempts on magnet motors are based on altering flux by presence of a magnetic object. This object is ofcourse as much affected by the magnet, as the manget is affected by the object. So what is the gain if these forces cancel eachother out? This is like playing with the two numbers 2 and 2. I sit down with the equation 2-2=0. No matter how I arrange these numbers, slice them apart in (1+1)-(1+1), or other configurations, the sum is allways zero. You cannot trick this numbers to get a sum greater or less than zero. So is it for the magnets as well. This is what I believe however. Maybe there is some enery in space or vacuum that can be "captured" to make a magnet motor work, but then it would be much less time consuming building a wind mill and attach a generator to it

Vidar