How does Cockcroft's work relate to modern particle accelerators?
The Cockcroft-Walton generator I developed with Ernest Walton is still used today as the initial stage in many large particle accelerators, including those at CERN and in medical cyclotrons. It provides a stable, high-voltage source to accelerate particles before they enter larger rings. The principle is the same: we use a voltage multiplier circuit to build up potential, then direct particles at a target. Modern accelerators are far more powerful, but the engineering logic—step-by-step energy gain—remains. At Harwell, we also pioneered the use of accelerators for radiation biology and materials science, which now underpin cancer radiotherapy and industrial imaging. The practical application is what matters: from our modest 800,000-volt apparatus to the Large Hadron Collider, the goal is still to probe the structure of matter. We have broken the atom, but we must not break the world—we must use this knowledge responsibly.
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