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Fusion Science and Technology
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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.”
V. Erckmann; W. Kasparek; Y. Koshurinov; L. Lubyako; M. I. Petelin; D. Yu. Shchegolkov; F. Hollmann; G. Michel; F. Noke; F. Purps; ECRH Groups at IPP Greifswald, IPF Stuttgart, IAP Nizhny Novgorod, FZK Karlsruhe, IFP Milano
Fusion Science and Technology | Volume 55 | Number 1 | January 2009 | Pages 23-30
Technical Paper | Electron Cyclotron Emission and Electron Cyclotron Resonance Heating | doi.org/10.13182/FST09-A4050
Articles are hosted by Taylor and Francis Online.
Experiments on the combination of the high-power wave beams from two gyrotrons and fast switching of the combined beam between two transmission channels are described. The measurements were performed using a high-power resonator diplexer in the optical transmission line of the electron cyclotron heating system for W7-X. The principle and the engineering design of the prototype four-port quasi-optical diplexer is presented. The wave beams from two gyrotrons with output powers of 370 and 560 kW, respectively, have been combined for pulse lengths up to 10 s, limited only by the uncooled mirrors used in the diplexer. By modulating the gyrotron frequency using a fast high-voltage body modulator, controlled toggling of the combined power between the two outputs of the diplexer was demonstrated with switching frequencies of up to 20 kHz.The experiments are compared to theory, showing good agreement when the limited stability of the free-running gyrotrons is taken into account.
