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Sharp hollow density profile with TVTS on ECRH JFT-2M plasma
Affiliation:1. Selcuk University, Science Faculty, Department of Biology, Campus, 42250, Konya, Turkey;2. Department of Medicinal Laboratory, Vocational School of Health Services, Selcuk University, Konya, Turkey;3. Department of Pharmaceutical Botany, “Iuliu Hatieganu” University of Medicine and Pharmacy, 8, V. Babes Street, Cluj-Napoca, Romania;4. Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, 66100, Chieti, Italy;5. Centre of Marine Sciences, Faculty of Sciences and Technology, Campus of Gambelas, University of Algarve, Faro, Portugal;6. Faculty of Sciences of the University of Lisbon, Centre of Chemistry and Biochemistry/Department of Chemistry and Biochemistry, Building C8, Floor 5, Campo Grande, 1749-016 Lisbon, Portugal;7. Department of Health Sciences, Faculty of Science, University of Mauritius, Mauritius;1. Department of Chemistry, Faculty of science, University of Qom, P. O. Box 37185-359, Qom, Iran;2. Department of Petroleum Geoscience, Faculty of Science, Soran University, PO Box 624, Soran, Kurdistan Regional Government, Iraq;1. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, South Korea;2. School of Electrical Engineering, Pusan National University, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan, 46241, South Korea;1. Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing, College of Electronic and Information Engineering, Southwest University, Chongqing, China;2. School of Artificial Intelligence, Southwest University, Chongqing, China;3. Ocean College, Zhejiang University, Zhejiang, China
Abstract:The first hollow electron density profile in the central region is measured during the electron cyclotron resonance heating (ECRH) on the JFT-2M tokamak with a TV Thomson scattering system. The density of the peripheral region is not hollow but is accumulated by the pump out from the central region and the gas puffing from outside. The hollowness increases with time but is saturated at ∼ 40 ms and maintains the constant hollow ratio in spite of a slight decrease of temperature. The hollowness is strongly connected with the steep temperature gradient of the heated zone.
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