Nelia Anne Carlton Davies (born 1943) is a retired American physicist who oversaw US-based research on fusion power as head of the US Fusion Energy Sciences program from 1989 to 2006. [1]
Davies was born on February 15, 1943, in Springfield, Missouri. She grew up in Arkansas, and graduated from Little Rock Central High School in 1961. [2] She majored in physics at Vassar College, and completed a Ph.D. in 1972 at Yale University, [1] with a dissertation in plasma physics, [2] supervised by Jay L. Hirshfield. [3]
After two years as a postdoctoral researcher at the University of Texas at Austin, she joined the Tokamak Systems Branch of the United States Atomic Energy Commission in 1974, and became branch chief in 1975. [1] Through the Energy Reorganization Act of 1974, this part of the Atomic Energy Commission was split into the newly formed Energy Research and Development Administration in 1975, [4] and then merged into the United States Department of Energy when it was created in 1977. [5]
In 1980, she became a divisional director, of the Toroidal Confinement Systems Division in the Office of Fusion Energy. She was named as deputy director of the US Fusion Energy Sciences program in 1985, and director in 1989. [1] Her tenure saw the program through turbulent times, as the US Congress cut its budget from $345 million to $284 million in 1991, raised it to $350 million again by 1995, and cut it to $239 million the following year. [2] She retired in 2006. [1] [6]
In her retirement, she moved to a farm in Boyds, Maryland, took up horseback fox hunting, and joined the board of directors of Fusion Power Associates, a private foundation for fusion power research. [2]
Davies received the Meritorious Service Award of the Department of Energy in 1984, the Meritorious Presidential Rank Award in 1991, and the Secretary of Energy Gold Medal in 1997, and the Meritorious Presidential Executive Rank Award in 1999. [1]
In 2003, she was named as a Fellow of the American Physical Society (APS), after a nomination from the APS Forum on Physics and Society, "for her successful efforts guiding the fusion research community through a difficult transition from a program of energy technology development to a healthy program focused on the critical scientific and technology foundations of fusion energy research". [7]
Princeton Plasma Physics Laboratory (PPPL) is a United States Department of Energy national laboratory for plasma physics and nuclear fusion science. Its primary mission is research into and development of fusion as an energy source. It is known for the development of the stellarator and tokamak designs, along with numerous fundamental advances in plasma physics and the exploration of many other plasma confinement concepts.
A magnetic mirror, also known as a magnetic trap or sometimes as a pyrotron, is a type of magnetic confinement fusion device used in fusion power to trap high temperature plasma using magnetic fields. The mirror was one of the earliest major approaches to fusion power, along with the stellarator and z-pinch machines.
Fusion power is a proposed form of power generation that would generate electricity by using heat from nuclear fusion reactions. In a fusion process, two lighter atomic nuclei combine to form a heavier nucleus, while releasing energy. Devices designed to harness this energy are known as fusion reactors. Research into fusion reactors began in the 1940s, but as of 2024, no device has reached net power, although net positive reactions have been achieved.
This timeline of nuclear fusion is an incomplete chronological summary of significant events in the study and use of nuclear fusion.
ITER is an international nuclear fusion research and engineering megaproject aimed at creating energy through a fusion process similar to that of the Sun. Upon completion of construction of the main reactor and first plasma, planned for late 2025, it will be the world's largest magnetic confinement plasma physics experiment and the largest experimental tokamak nuclear fusion reactor. It is being built next to the Cadarache facility in southern France. ITER will be the largest of more than 100 fusion reactors built since the 1950s, with ten times the plasma volume of any other tokamak operating today.
Inertial electrostatic confinement, or IEC, is a class of fusion power devices that use electric fields to confine the plasma rather than the more common approach using magnetic fields found in magnetic confinement fusion (MCF) designs. Most IEC devices directly accelerate their fuel to fusion conditions, thereby avoiding energy losses seen during the longer heating stages of MCF devices. In theory, this makes them more suitable for using alternative aneutronic fusion fuels, which offer a number of major practical benefits and makes IEC devices one of the more widely studied approaches to fusion.
The Laboratory for Laser Energetics (LLE) is a scientific research facility which is part of the University of Rochester's south campus, located in Brighton, New York. The lab was established in 1970 with operations jointly funded by the United States Department of Energy, the University of Rochester and the New York State government. The Laser Lab was commissioned to investigate high-energy physics involving the interaction of extremely intense laser radiation with matter. Scientific experiments at the facility emphasize inertial confinement, direct drive, laser-induced fusion, fundamental plasma physics and astrophysics using the Omega Laser Facility. In June 1995, OMEGA became the world's highest-energy ultraviolet laser. The lab shares its building with the Center for Optoelectronics and Imaging and the Center for Optics Manufacturing. The Robert L. Sproull Center for Ultra High Intensity Laser Research was opened in 2005 and houses the OMEGA EP laser, which was completed in May 2008.
Alcator C-Mod was a tokamak that operated between 1991 and 2016 at the Massachusetts Institute of Technology (MIT) Plasma Science and Fusion Center (PSFC). Notable for its high toroidal magnetic field, Alcator C-Mod holds the world record for volume averaged plasma pressure in a magnetically confined fusion device. Until its shutdown in 2016, it was one of the major fusion research facilities in the United States.
The polywell is a proposed design for a fusion reactor using an electric and magnetic field to heat ions to fusion conditions.
The Office of Science is a component of the United States Department of Energy (DOE). The Office of Science is the lead federal agency supporting fundamental scientific research for energy and the Nation’s largest supporter of basic research in the physical sciences. The Office of Science portfolio has two principal thrusts: direct support of scientific research and direct support of the development, construction, and operation of unique, open-access scientific user facilities that are made available for use by external researchers.
Alvin William Trivelpiece was an American physicist whose varied career included positions as director of the Office of Energy Research of the U.S. Department of Energy (DOE), executive officer of the American Association for the Advancement of Science (AAAS), and director of Oak Ridge National Laboratory (ORNL). He was also a professor of physics and a corporate executive. Trivelpiece's research focused on plasma physics, controlled thermonuclear research, and particle accelerators. He received several patents for accelerators and microwave devices. He died in Rancho Santa Margarita, California in August 2022 at the age of 91.
Richard Freeman Post was an American physicist notable for his work in nuclear fusion, plasma physics, magnetic mirrors, magnetic levitation, magnetic bearing design and direct energy conversion.
Stephen O. Dean is an American physicist, engineer and author. He was born in Niagara Falls, New York, United States, and grew up there through high school.
Robert James Goldston is a professor of astrophysics at Princeton University and a former director of the Princeton Plasma Physics Laboratory.
The Princeton Large Torus, was an early tokamak built at the Princeton Plasma Physics Laboratory (PPPL). It was one of the first large scale tokamak machines and among the most powerful in terms of current and magnetic fields. Originally built to demonstrate that larger devices would have better confinement times, it was later modified to perform heating of the plasma fuel, a requirement of any practical fusion power device.
Robert W. Conn was president and chief executive officer of The Kavli Foundation from 2009 to 2020, a U.S. based foundation dedicated to the advancement of basic science research and public interest in science. A physicist and engineer, Conn was also the board chair of the Science Philanthropy Alliance, an organization that aims to increase private support for basic science research, and dean emeritus of the Jacobs School of Engineering at the University of California, San Diego. In the 1970s and 1980s, Conn participated in some of the earliest studies of fusion energy as a potential source of electricity, and he served on numerous federal panels, committees, and boards advising the government on the subject. In the early 1970s, he co-founded the Fusion Technology Institute at the University of Wisconsin-Madison (UW), and in the mid-1980s he led the formation of the Institute of Plasma and Fusion Research at the University of California, Los Angeles (UCLA). As a university administrator in the 1990s and early 2000s, Conn served as dean of the school of engineering at UC San Diego as it established several engineering institutes and programs, including the California Institute for Telecommunications and Information Technology, known as Calit2, the Center for Wireless Communications, and the Whitaker Center for Biomedical Engineering. While at UC San Diego he also led the effort to establish an endowment for the school of engineering, which began with major gifts from Irwin and Joan Jacobs. Irwin M. Jacobs is the co-founder and founding CEO of Qualcomm. While Conn was dean, the engineering school was renamed in 1998 the Irwin and Joan Jacobs School of Engineering at UC San Diego. Conn's experience in the private sector includes co-founding in 1986 Plasma & Materials Technologies, Inc. (PMT), and serving as managing director of Enterprise Partners Venture Capital (EPVC) from 2002 to 2008. Over the years he has served on numerous private and public company corporate boards. Conn joined The Kavli Foundation in 2009. He helped establish the Science Philanthropy Alliance in 2012.
Zap Energy is an American company that aims to commercialize fusion power through use of a sheared-flow-stabilized Z-pinch. The company is based near Seattle with research facilities in Everett and Mukilteo, Washington. The company aims to scale their technology to maintain plasma stability at increasingly higher energy levels, with the goal of achieving scientific breakeven and eventual commercial profitability.
David A. Hammer is the J. Carlton Ward, Jr. Professor of Nuclear Energy Engineering, in the Cornell University College of Engineering. In 2004, Hammer received the Institute of Electrical and Electronics Engineers Plasma Science and Applications Committee Award, as well as the Distinguished Career Award from Fusion Power Associates in 2018.
Maria Gatu Johnson is a Swedish-American plasma physicist whose research involves the use of neutron spectrometry to study inertial confinement fusion and stellar nucleosynthesis. She works at the Massachusetts Institute of Technology as a principal research scientist in the MIT Plasma Science and Fusion Center.