Beam divergence and power loading on the beamline components of the negative-ion based NBI system for JT-60U

Citation
Lq. Hu et al., Beam divergence and power loading on the beamline components of the negative-ion based NBI system for JT-60U, FUSION ENG, 54(2), 2001, pp. 321-330
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Nuclear Emgineering
Journal title
FUSION ENGINEERING AND DESIGN
ISSN journal
0920-3796 → ACNP
Volume
54
Issue
2
Year of publication
2001
Pages
321 - 330
Database
ISI
SICI code
0920-3796(200102)54:2<321:BDAPLO>2.0.ZU;2-D
Abstract
In JT-60U, a high-energy neutral beam injection (NBI) program using negativ e-ion based NBI (N-NBI) for non-inductive current drive and core plasma hea ting studies in high-density plasma has progressed. The target performance of the N-NBI is a neutral beam injection power of 10 MW for 10 s at 500 keV . A neutral beam power of 5.2 MW at 350 keV with deuterium has already been injected into JT-60U plasma. The beam divergence and power loading onto th e beamline components are two important items to evaluate beam performance. The beam divergence, estimated roughly from heat loads at the beam drift d uct in beam injection experiments into JT-60U plasma, was around 4 mrad for the horizontal direction and 6 mrad for the vertical direction, which were close to the design values of 5 mrad. The power loading on beamline compon ents were reasonable as compared with the design value. (C) 2001 Elsevier S cience B.V. All rights reserved.