ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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!
Latest Magazine Issues
Jul 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
August 2025
Nuclear Technology
Fusion Science and Technology
July 2025
Latest News
Applications open for the fall cohort of Mentor Match
Applications are officially open for the second cohort of the American Nuclear Society’s newly redesigned mentoring program. Mentor Match is a unique opportunity available only to ANS members that offers year-round mentorship and networking opportunities to Society members at any point in their education.
The deadline to apply for membership in the fall cohort, which will take place October 1–November 30, is September 17. The application form can be found here.
Kazunobu Nagasaki, Motoyasu Sato, Masashi Iima, Sakuji Kobayashi, Kinzo Sakamoto, Hideki Zushi
Fusion Science and Technology | Volume 25 | Number 4 | July 1994 | Pages 419-427
Technical Paper | Plasma Heating System | doi.org/10.13182/FST94-A30248
Articles are hosted by Taylor and Francis Online.
A new high-power electron cyclotron heating system has been installed for the Heliotron-E helical device. This system is designed to operate at 106-GHz frequency with a half-megawatt output power. The system consists of a pulse gyrotron with TE12,2 whispering gallery mode (WGM) output, conversion system of the WGM into the Gaussianlike beam, transmission line for HE11 mode, and launching system. From measurement of radiation patterns, it was confirmed that the WGM was effectively converted into the Gaussianlike beam, and the emergent radiation profile from the tubular oversized corrugated waveguide was close to a circular Gaussian one even when the beam coupled to the HE11 mode had the side lobes before the transmission. This indicates that the oversized corrugated waveguides act as a mode filter. The launching system effectively focuses the Gaussian beam in the free space to a 2-cm (poloidal) × 3-cm (toroidal) e-folding power spot size. These are small enough compared with the plasma minor radius (∼15 cm). It is expected that the power deposition can be well localized in the plasma central region.