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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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October 2025
Latest News
Empowering the next generation: ANS’s newest book focuses on careers in nuclear energy
A new career guide for the nuclear energy industry is now available: The Nuclear Empowered Workforce by Earnestine Johnson. Drawing on more than 30 years of experience across 16 nuclear facilities, Johnson offers a practical, insightful look into some of the many career paths available in commercial nuclear power. To mark the release, Johnson sat down with Nuclear News for a wide-ranging conversation about her career, her motivation for writing the book, and her advice for the next generation of nuclear professionals.
When Johnson began her career at engineering services company Stone & Webster, she entered a field still reeling from the effects of the Three Mile Island incident in 1979, nearly 15 years earlier. Her hiring cohort was the first group of new engineering graduates the company had brought on since TMI, a reflection of the industry-wide pause in nuclear construction. Her first long-term assignment—at the Millstone site in Waterford, Conn., helping resolve design issues stemming from TMI—marked the beginning of a long and varied career that spanned positions across the country.
K. Ohkubo, S. Kubo, T. Shimozuma, Y. Yoshimura, H. Igami, S. Kobayashi
Fusion Science and Technology | Volume 62 | Number 3 | November 2012 | Pages 389-402
Technical Paper | doi.org/10.13182/FST12-A15338
Articles are hosted by Taylor and Francis Online.
In the system of electron cyclotron heating, highly overmoded, corrugated circular waveguides are used. To analyze propagating mode content in the waveguide, burn patterns of the thermal paper placed on the waveguide aperture are observed at several positions. Theoretical burn patterns are obtained by taking into account a nonlinear grayscale response of the thermal paper to the calculated power profiles. We have developed a new method of mode analysis by nonlinear optimization, which is based on an iterative error reduction of differences between observed and theoretical patterns. To examine the status of polarization, the transformation between hybrid modes and linearly polarized (LP) modes is derived. The method is applied to the 82.7-GHz transmission line connected with the gyrotron. The propagating wave is linear polarized and consists of [approximately]4% of the LP11 odd mode, [approximately]95% of the LP01 mode, and [approximately]1% of other modes. The calculated burn pattern is similar to the observed one, like a plateau. By using both center of power and weighted averages of the perpendicular wavenumber in these profiles, offset and tilting angles of an injecting electromagnetic beam to the waveguide entrance are inferred. These are verified to be consistent with the results by the coupling code of a Gaussian beam with hybrid modes.
