Neutral beams for ITER (invited){sup a}

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1146852· OSTI ID:279579

Hemsworth, R S; Feist, J; Hanada, M; Heinemann, B; Inoue, T; Kussel, E; Krylov, A; Lotte, P; Miyamoto, K; Miyamoto, N; Murdoch, D; Nagase, A; Ohara, Y; Okumura, Y; Pamela, J; Panasenkov, A; Shibata, K; Tanii, M; Watson, M

Neutral beam injection has been the most successful scheme used to heat magnetically confined plasmas studied in controlled nuclear fusion research, and neutral beams are a candidate to heat to ignition the International Tokamak Experimental Reactor (ITER). This article describes the system which is presently being designed in Europe, Japan, and Russia, with coordination by the Joint Central Team of ITER at Naka, Japan. The proposed system consists of three negative ion based neutral injectors, delivering a total of 50 MW of 1 MeV D{sup 0} to the ITER plasma for pulse length of {approx_gt}1000 s. The proposed injectors each use a single caesiated volume arc discharge negative ion source, and a multigrid, multiaperture accelerator, to produce about 40 A of 1 MeV D{sup {minus}}. This will be neutralized in a subdivided gas neutralizer, which has a conversion efficiency of about 60{percent}. The charged fraction of the beam emerging from the neutralizer is dumped onto the water-cooled surfaces making up the electrostatic residual ion dump. A water-cooled calorimeter can be moved into the beam path to intercept the neutral beam, allowing commissioning of the injector independent of ITER. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 279579
• Report Number(s): CONF-9509125--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 67; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMP BEAM CURRENTS
DEUTERIUM
ION SOURCES
ITER TOKAMAK
MEV RANGE 01-10
NEUTRAL ATOM BEAM INJECTION
POWER RANGE 10-100 MW