Lewi I. Tonks: A Legacy of Physics and Public Service
Lewi I. Tonks was a distinguished physicist whose career spanned the evolution of modern electronics, nuclear energy, and plasma physics. Born in New York City on December 13, 1897, Tonks dedicated his life to both rigorous scientific inquiry and active civic engagement, leaving a mark on both the laboratory and the political landscape of the United States.
Tonks began his academic journey at Columbia University, where he earned a Bachelor of Science in 1918. His pursuit of higher knowledge was briefly interrupted by World War I, during which he contributed to the war effort at the New London Connecticut Naval Station. There, he conducted critical research on sonar (sound navigation and ranging) for submarine detection systems. Following the war, he returned to Columbia to complete his PhD in mathematical physics in 1923.
During his university years, Tonks had the opportunity to attend lectures by Albert Einstein during the physicist's visit to Columbia in 1921. This connection led Tonks to serve as a translator of Einstein's papers for The New York Times.
Professional Career at General Electric
In 1923, Tonks joined General Electric, working under the guidance of Irving Langmuir, the associate director of the research lab. His early research focused on several key areas of physics:
- Thermionic emission: The release of electrons from a heated filament.
- Ferromagnetism: The basic mechanism by which certain materials form permanent magnets.
- Magnetrons: Vacuum tubes used for microwave generation.
During World War II, Tonks applied his expertise to national defense by heading the General Electric research group focused on jamming magnetrons.
Contributions to Plasma Physics and Vacuum Technology
Tonks is perhaps best remembered for his foundational work in plasma physics. In 1929, he and Irving Langmuir developed a general theory of plasma and published a seminal paper on plasma oscillation, which describes the collective oscillation of electrons in a plasma.
Beyond plasma, Tonks sought to improve the precision of scientific measurement. He advocated for the adoption of a logarithmic pressure scale for vacuum technology as a more efficient replacement for the torr (a unit of pressure based on a millimeter of mercury).
Nuclear Research and Fusion
In 1946, Tonks transitioned to the Knolls Atomic Power Laboratory, operated by General Electric for the U.S. Atomic Energy Commission. His work here shifted toward the burgeoning field of nuclear energy, where he specialized in:
- The theory of nuclear reactor shielding.
- Neutron diffusion within reactors.
Notably, Tonks contributed to the early pursuit of fusion power by creating one of the first designs for the Model D stellarator, a device used to confine plasma for nuclear fusion.
Civic Engagement and Political Activism
Lewi Tonks was not solely defined by his scientific achievements; he was a passionate advocate for social change. He was a member of the Socialist Party and ran for the U.S. House of Representatives from New York's 30th congressional district twice, earning 2.5% of the vote in 1934 and 1.9% in 1936.
His activism continued later in life as he campaigned on issues related to the Vietnam War and joined the Clergy and Layman Concerned About Vietnam. He also shared his knowledge with the general public through the Science Forum broadcast on WGY radio station, where he answered scientific questions from listeners.
Key Facts
- Education: BS (1918) and PhD in mathematical physics (1923) from Columbia University.
- Major Collaborator: Worked extensively with Nobel laureate Irving Langmuir.
- Scientific Milestones: Co-developed the general theory of plasma and designed an early Model D stellarator.
- Public Service: Ran for Congress twice as a Socialist Party candidate.
- Professional Honors: Fellow of the American Physical Society (1931).
| Period/Year | Affiliation/Role | Key Contribution/Event |
|---|---|---|
| 1918-1923 | Columbia University | PhD in Mathematical Physics; translated Einstein's papers |
| 1923-1963 | General Electric | Research on plasma, magnetrons, and thermionic emission |
| 1929 | Collaboration with Langmuir | General theory of plasma and plasma oscillation |
| 1934 & 1936 | Socialist Party | Candidacy for U.S. House of Representatives |
| 1946 | Knolls Atomic Power Laboratory | Nuclear reactor shielding and Model D stellarator design |
Later Life and Legacy
Tonks retired from General Electric in 1963 and spent his final years volunteering for the Schenectady Human Rights Commission. He passed away from a heart attack in July 1971 in Glen Ridge, New Jersey, at the age of 74, survived by his wife and three children.
His professional and personal legacy is preserved through his collected papers, which include research notes, drafts, and correspondence from the 1930s to the 1960s. These archives are currently housed at the Niels Bohr Library of the American Institute of Physics in College Park, Maryland.
Frequently Asked Questions
What was Lewi I. Tonks' contribution to plasma physics?
In 1929, Tonks and Irving Langmuir developed a general theory of plasma and published a key paper on plasma oscillation, which describes how electrons move collectively within a plasma.
Did Lewi I. Tonks have any connection to Albert Einstein?
Yes, Tonks attended Einstein's lectures at Columbia University in 1921 and subsequently served as a translator for Einstein's papers for The New York Times.
What role did Tonks play during World War II?
During the war, Tonks led a research group at General Electric that focused on the development of jamming magnetrons.
Was Lewi I. Tonks involved in politics?
Yes, he was a member of the Socialist Party and ran for the U.S. House of Representatives in 1934 and 1936. He was also active in campaigning against the Vietnam War.
What is the Model D stellarator?
The Model D stellarator is a device designed for fusion power; Tonks created one of the first designs for this technology while working at the Knolls Atomic Power Laboratory.