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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Fusion Science and Technology
Latest News
ARPA-E announces $40 million to develop transmutation technologies for UNF
The Department of Energy’s Advanced Research Projects Agency–Energy (ARPA-E) announced $40 million in funding to develop cutting-edge technologies to enable the transmutation of used nuclear fuel into less-radioactive substances. According to ARPA-E, the new initiative addresses one of the agency’s core goals as outlined by Congress: to provide transformative solutions to improve the management, cleanup, and disposal of radioactive waste and spent nuclear fuel.
K. Nojiri, M. Sakamoto, K. Oki, M. Yoshikawa, Y. Nakashima, M. Yoshikawa, A. Terakado, R. Nohara, M. Mizuguchi, T. Imai, M. Ichimura
Fusion Science and Technology | Volume 68 | Number 1 | July 2015 | Pages 120-124
Technical Paper | Open Magnetic Systems 2014 | doi.org/10.13182/FST14-893
Articles are hosted by Taylor and Francis Online.
In GAMMA 10/PDX, the relationship between electron density and temperature of the divertor simulation plasma in the divertor simulation experimental module (D-module) and the density of the upstream plasma has been studied. As the amount of gas (H2 and Ar) injected into the D-module increases, the line-averaged electron density (ne_WP) of the west plug plasma (i.e., upstream plasma) increases due to gas flow from the D-module to the upstream. The electron temperature of the divertor simulation plasma monotonically decreases with increase in ne_WP. The electron density of the divertor simulation plasma becomes saturated against increase in ne_WP when the plasma is sustained only by the ion cyclotron heating. This may suggest a sign of the beginning of the density roll-over. Additional electron cyclotron heating to the upstream plasma increases the density of both the upstream plasma and the divertor simulation plasma, and the saturated density of the divertor simulation plasma recovers to a linear dependence on ne_WP, suggesting an enhanced ionization of neutral gases in the upstream and the D-module.