Very unlikely. In order to project a dome-shaped barrier, the source needs to be at the center. Either that, or several smaller machines are aligned all around it. I've seen no proof of that, so far.

[absentmindedly running a hand through his hair.]

Of course, there are hundreds of other theories, each as unlikely as the next. But we can't rule out the possibility of any one of them without more knowledge about the barrier itself.