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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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September 2025
Nuclear Technology
Fusion Science and Technology
August 2025
Latest News
New coolants, new fuels: A new generation of university reactors
Here’s an easy way to make aging U.S. power reactors look relatively youthful: Compare them (average age: 43) with the nation’s university research reactors. The 25 operating today have been licensed for an average of about 58 years.
Yu. P. Martseniuk, Yu. V. Kovtun, V. E. Moiseenko, A. V. Lozin, A. N. Shapoval, O. V. Yevsiukov, V. B. Korovin, E. D. Kramskoy, M. M. Kozulya, D. I. Baron
Fusion Science and Technology | Volume 81 | Number 6 | August 2025 | Pages 530-541
Research Article | doi.org/10.1080/15361055.2025.2478541
Articles are hosted by Taylor and Francis Online.
For the stellarator Uragan-2M, a glow discharge system for wall conditioning was developed and installed. The experiments were conducted in the range of discharge currents from 0.025 to 1 A and argon working gas pressures from 0.27 to 13.1 Pa. It is found that the measured current-voltage characteristics are similar to the discharge with a hollow cathode. In the optical spectrum of the glow discharge plasma, Ar lines of the excited atoms Ar I (Ar*) and ions Ar II (Ar+*) of the main argon gas, as well as the lines of excited hydrogen atoms H I (H*), are observed. The appearance of hydrogen is associated with the desorption of hydrogen from stainless steel because of the interaction of argon with the surface of the vacuum chamber (cathode). The radial profile of plasma density and electron temperature was measured using a movable triple probe. The maximum plasma density was 7.6 × 1014 m−3, and the plasma temperature was 4.6 eV.