When Ernest Lawrence was 2 years old, he got hold of a box of matches and set his own clothes on fire. His mother, recalling it decades later, didn’t describe it as a warning sign. She described it as the first evidence of a curiosity that never really slowed down for the rest of his life. That’s a strange way to introduce a Nobel Prize winner, but it’s the detail that stuck with me — a kid who burns himself testing what fire does, growing up to build the machine that made it possible to smash atoms apart and manufacture new elements that don’t exist anywhere else in nature.
The Man Who Invented the Cyclotron Started With a Sketch on a Napkin
Lawrence was born in 1901 in Canton, South Dakota, the son of Norwegian immigrants who both taught at the local high school. He moved through degrees quickly — South Dakota, Minnesota, and finally a physics PhD from Yale in 1925 — before landing at UC Berkeley in 1928, where he became the university’s youngest full professor at 29.
In 1929, reading a paper by Norwegian engineer Rolf Widerøe on accelerating particles, Lawrence had the idea that would define his career: instead of building one enormous, impossibly expensive machine to accelerate particles in a straight line, why not use a magnetic field to bend their path into a spiral, giving them a small push each time they came around? The particles would gain energy on every loop, reaching enormous speeds inside a device that could fit on a tabletop. He called it the cyclotron.
From Tabletop Device to the Machine Behind an Entire Field
The first working cyclotron, built in 1930, was 4 inches across and cost almost nothing to construct. It worked. Lawrence spent the rest of the decade scaling the idea up — 11 inches, then 27, then 60 — each version smashing particles with more force than the last, each one turning Berkeley into the center of a kind of physics that hadn’t really existed before. In 1939, Lawrence won the Nobel Prize in Physics for the invention, less than a decade after that first tabletop version worked.
What the cyclotron actually did, in practical terms, was let physicists bombard atomic nuclei with enough force to knock them apart or fuse new ones together — the exact process behind discovering artificial radioactive elements. Glenn Seaborg used Lawrence’s 60-inch cyclotron to make plutonium in 1941, the first of 10 new elements Seaborg would go on to identify. None of that happens on Lawrence’s machine, none of it happens at all, at least not then, not that way.
The Teacher Behind Careers Bigger Than His Own
Lawrence didn’t just build a machine — he built an institution around it, and trained the people who ran it. Among his doctoral students was Chien-Shiung Wu, the experimental physicist whose 1957 work proved a fundamental law of physics could be broken — work we’ve covered elsewhere on this site, in a piece about scientists whose contributions went unrewarded. It’s a strange thing to notice, looking back at Lawrence’s student list: the machine he built, and the scientists he trained on it, kept generating major discoveries for decades after his own Nobel Prize was already old news.
By 1936, Lawrence was director of what would become the Radiation Laboratory, and during World War II he turned the cyclotron’s underlying technology toward separating uranium isotopes for the Manhattan Project — a wartime contribution measured in the same terms as Seaborg’s plutonium work, running in parallel toward the same urgent goal.
Big Science, and a Life That Ended Too Soon
Lawrence became, by most accounts, the person most responsible for inventing what scientists now call “Big Science” — the idea that some questions in physics simply require massive machines, massive teams, and massive government funding to answer, rather than a single researcher working alone in a small lab. He spent his later career lobbying for exactly that kind of investment, and after the war, he pushed in the opposite direction too, joining the U.S. delegation at the 1958 Geneva Conference to negotiate a suspension of nuclear weapons testing.
He never got to see how that negotiation played out. Lawrence died the same year, in August 1958, at 57, following complications from chronic colitis — a comparatively young death for a man who’d already reshaped how physics gets funded and practiced.
An Element Named After Him, Three Years Too Late
According to the Nobel Prize’s official biography of Lawrence, his name now lives on in two national laboratories — Lawrence Berkeley and Lawrence Livermore — both renamed in his honor after his death. In 1961, researchers at the Berkeley lab he’d founded discovered element 103 and named it lawrencium.
I keep comparing this, unavoidably, to Seaborg’s story. Seaborg got to watch element 106 named after him while he was still alive to enjoy it — a genuine rarity. Lawrence, whose machine made that entire category of discovery possible in the first place, had to wait 3 years after his own death for the same honor. He built the tool that let an entire generation of chemists write their names onto the periodic table, and his own name arrived on it only once he could no longer read it.
More Stories Like This
Lawrence’s cyclotron runs quietly underneath two of our earlier pieces: it’s the machine Glenn Seaborg used to discover plutonium and nine more elements, and Lawrence personally trained Chien-Shiung Wu, whose story appears in our piece on scientists who should have won the Nobel Prize but didn’t.