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Remembering ANS member Gil Brown
Brown
The nuclear community is mourning the loss of Gilbert Brown, who passed away on July 11 at the age of 77 following a battle with cancer.
Brown, an American Nuclear Society Fellow and an ANS member for nearly 50 years, joined the faculty at Lowell Technological Institute—now the University of Massachusetts–Lowell—in 1973 and remained there for the rest of his career. He eventually became director of the UMass Lowell nuclear engineering program. After his retirement, he remained an emeritus professor at the university.
Sukesh Aghara, chair of the Nuclear Engineering Department Heads Organization, noted in an email to NEDHO members and others that “Gil was a relentless advocate for nuclear energy and a deeply respected member of our professional community. He was also a kind and generous friend—and one of the reasons I ended up at UMass Lowell. He served the university with great dedication. . . . Within NEDHO, Gil was a steady presence and served for many years as our treasurer. His contributions to nuclear engineering education and to this community will be dearly missed.”
Y. Kamada, T. Fujita, S. Ishida, M. Kikuchi, S. Ide, T. Takizuka, H. Shirai, Y. Koide, T. Fukuda, N. Hosogane, K. Tsuchiya, T. Hatae, H. Takenaga, M. Sato, H. Nakamura, O. Naito, N. Asakura, H. Kubo, S. Higashijima, Y. Miura, R. Yoshino, K. Shimizu, T. Ozeki, T. Hirayama, M. Mori, Y. Sakamoto, Y. Kawano, A. Isayama, K. Ushigusa, Y. Ikeda, H. Kimura, T. Fujii, T. Imai, M. Nagami, S. Takeji, T. Oikawa, T. Suzuki, T. Nakano, N. Oyama, S. Sakurai, S. Konoshima, T. Sugie, K. Tobita, T. Kondoh, H. Tamai, Y. Neyatani, A. Sakasai, Y. Kusama, K. Itami, M. Shimada, H. Ninomiya, H. Urano
Fusion Science and Technology | Volume 42 | Number 2 | September-November 2002 | Pages 185-254
Technical Paper | doi.org/10.13182/FST02-A227
Articles are hosted by Taylor and Francis Online.
Fusion plasma performance and confinement studies on JT-60 and JT-60U are reviewed. With the main aim of providing a physics basis for ITER and the steady-state tokamak reactors, JT-60/JT-60U has been developing and optimizing the operational concepts, and extending the discharge regimes toward sustainment of high integrated performance in the reactor relevant parameter regime. In addition to achievement of high fusion plasma performances such as the equivalent breakeven condition (QDTeq up to 1.25) and a high fusion triple product nD(0)ETi(0) = 1.5 × 1021 m-3skeV, JT-60U has demonstrated the integrated performance of high confinement, high N, full non-inductive current drive with a large fraction of bootstrap current. These favorable performances have been achieved in the two advanced operation regimes, the reversed magnetic shear (RS) and the weak magnetic shear (high-p) ELMy H modes characterized by both internal transport barriers (ITB) and edge transport barriers (ETB). The key factors in optimizing these plasmas towards high integrated performance are control of profiles of current, pressure, rotation, etc. utilizing a variety of heating, current drive, torque input, and particle control capabilities and high triangularity operation. As represented by discovery of ITBs (density ITB in the central pellet mode, ion temperature ITB in the high-p mode, and electron temperature ITB in the reversed shear mode), confinement studies in JT-60/JT-60U have been emphasizing freedom and also restriction of radial profiles of temperature and density. In addition to characterization of confinement and analyses of transport properties of the OH, the L-mode, the H-mode, the pellet mode, the high-p mode, and the RS mode, JT-60U has clarified formation conditions, spatial structures and dynamics of edge and internal transport barriers, and evaluated effects of repetitive MHD events on confinement such as sawteeth and ELMs. Through these studies, JT-60U has demonstrated applicability of the high confinement modes to ITER and the steady-state tokamak reactors.
