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

Abstract

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.

Authors:
 [1];  [2]; ; ; ;  [1]; ; ;  [3]
  1. Consorzio RFX, Associazione EURATOM-ENEA, Corso Stati Uniti 4, 35127 Padova (Italy)
  2. (Italy)
  3. National Institute for Fusion Science, Particle Beam Heated Research Div, 322-6, Oroshi-cho, Toki, Gifu, 509-5292 (Japan)
Publication Date:
OSTI Identifier:
21611683
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1390; Journal 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); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Chitarin, G., University of Padova, Dept. of Management and Engineering, strad. S. Nicola, 36100 Vicenza, Agostinetti, P., Gallo, A., Marconato, N., Serianni, G., Nakano, H., Takeiri, Y., and Tsumori, K. Experimental Mapping and Benchmarking of Magnetic Field Codes on the LHD Ion Accelerator. United States: N. p., 2011. Web. doi:10.1063/1.3637409.
Chitarin, G., University of Padova, Dept. of Management and Engineering, strad. S. Nicola, 36100 Vicenza, Agostinetti, P., Gallo, A., Marconato, N., Serianni, G., Nakano, H., Takeiri, Y., & Tsumori, K. Experimental Mapping and Benchmarking of Magnetic Field Codes on the LHD Ion Accelerator. United States. doi:10.1063/1.3637409.
Chitarin, G., University of Padova, Dept. of Management and Engineering, strad. S. Nicola, 36100 Vicenza, Agostinetti, P., Gallo, A., Marconato, N., Serianni, G., Nakano, H., Takeiri, Y., and Tsumori, K. Mon . "Experimental Mapping and Benchmarking of Magnetic Field Codes on the LHD Ion Accelerator". United States. doi:10.1063/1.3637409.
@article{osti_21611683,
title = {Experimental Mapping and Benchmarking of Magnetic Field Codes on the LHD Ion Accelerator},
author = {Chitarin, G. and University of Padova, Dept. of Management and Engineering, strad. S. Nicola, 36100 Vicenza and Agostinetti, P. and Gallo, A. and Marconato, N. and Serianni, G. and Nakano, H. and Takeiri, Y. and Tsumori, K.},
abstractNote = {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.},
doi = {10.1063/1.3637409},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1390,
place = {United States},
year = {2011},
month = {9}
}