Experimental Mapping and Benchmarking of Magnetic Field Codes on the LHD Ion Accelerator

Journal Article · Mon Sep 26 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3637409· OSTI ID:21611683

Chitarin, G ^[1]; Agostinetti, P; Gallo, A; Marconato, N; Serianni, G ^[1]; Nakano, H; Takeiri, Y; Tsumori, K ^[2]

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1. Consorzio RFX, Associazione EURATOM-ENEA, Corso Stati Uniti 4, 35127 Padova (Italy)
2. National Institute for Fusion Science, Particle Beam Heated Research Div, 322-6, Oroshi-cho, Toki, Gifu, 509-5292 (Japan)

For the validation of the numerical models used for the design of the Neutral Beam Test Facility for ITER in Padua [1], an experimental benchmark against a full-size device has been sought. The LHD BL2 injector [2] has been chosen as a first benchmark, because the BL2 Negative Ion Source and Beam Accelerator are geometrically similar to SPIDER, even though BL2 does not include current bars and ferromagnetic materials. A comprehensive 3D magnetic field model of the LHD BL2 device has been developed based on the same assumptions used for SPIDER. In parallel, a detailed experimental magnetic map of the BL2 device has been obtained using a suitably designed 3D adjustable structure for the fine positioning of the magnetic sensors inside 27 of the 770 beamlet apertures. The calculated values have been compared to the experimental data. The work has confirmed the quality of the numerical model, and has also provided useful information on the magnetic non-uniformities due to the edge effects and to the tolerance on permanent magnet remanence.

• OSTI ID: 21611683
• Journal Information: AIP Conference Proceedings, Vol. 1390, Issue 1; Conference: 2. international symposium on negative ions, beams and sources, Takayama City (Japan), 16-19 Nov 2010; Other Information: DOI: 10.1063/1.3637409; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
43 PARTICLE ACCELERATORS
ACCELERATORS
ANIONS
APERTURES
BEAM INJECTION HEATING
BENCHMARKS
DESIGN
FERROMAGNETIC MATERIALS
ION SOURCES
ITER TOKAMAK
LHD DEVICE
MAGNETIC FIELDS
MAPPING
NEUTRAL ATOM BEAM INJECTION
PERMANENT MAGNETS
PLASMA
PLASMA HEATING
SENSORS
BEAM INJECTION
CHARGED PARTICLES
CLOSED PLASMA DEVICES
EQUIPMENT
HEATING
IONS
MAGNETIC MATERIALS
MAGNETS
MATERIALS
OPENINGS
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS