Complex sentence: These were the same sorts of instabilities seen in earlier machines, and precisely the problem Cockcroft had mentioned during the press releases, but in ZETA they were much more powerful and the neutrons appeared to be fusion related until further work demonstrated their nature.
Split into simpler sentences: These were the same sorts of instabilities seen in earlier machines, and precisely the problem Cockcroft had mentioned during the press releases. But in ZETA they were much more powerful and the neutrons appeared to be fusion related until further work demonstrated their nature.