Operation and Development on the Positive-Ion Based Neutral Beam Injection System for JT-60 and JT-60U
- 1 November 2002
- journal article
- research article
- Published by Informa UK Limited in Fusion Science and Technology
- Vol. 42 (2-3), 424-434
- https://doi.org/10.13182/fst02-a238
Abstract
The positive-ion based neutral beam injection (NBI) system for JT-60, which consists of 14 beamline units and has a beam energy of 70 to 100 keV, started operation in 1986 with hydrogen beams and injected a neutral beam power of 27 MW at 75 keV into the JT-60 plasma. In 1991, the NBI system was modified to be able to handle deuterium beams as part of the JT-60 upgrade modification. After executing some research and developments, deuterium beams of 40 MW at 95 keV were injected in 1996. As a result, NBI has contributed to the achievement of the highest performance plasmas, a DT-equivalent fusion power gain of 1.25 and a fusion triple product of 1.55 × 1021 keVs/m3, in the world on JT-60U.Keywords
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