Design and test of the support elements of the W7-X magnet system

Damiani, Carlo; Bäumel, S.; Benndorf, A.; Bykov, V.; Cardella, A.; Dänner, W.; Dübner, A.; Dudek, Andrzej; Gardebrecht, W.; Gasparotto, M.; Giesen, B.; Hartmann, D.; Heinemann, B.; Holtum, D.; Hurd, F.; Koch, F.; Junghanns, P.; Lennartz, M.; Lingertat, J.; Mendelevitch, B.; Panin, A.; Pilopp, D.; Reisgen, U.; Sonnerup, L.; Tretter, J.; Eeten, P. van; Wendorf, J.

doi:10.1109/fusion.2005.252882

Cited by 10 publications

(10 citation statements)

References 3 publications

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“…A single coil must be kept precisely into position but must be adjustable in all 6 degrees of freedom without influencing the position of other coils. Special tilting bearings (narrow support elements) must be installed (tolerance 0.1 mm) together with a coil [4]. For this, every coil is tentatively positioned, the distance to the neighboring coil is measured and the support element gets accordingly customized.…”

Section: A Semi Modules (Sm)mentioning

confidence: 99%

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Experiences From the Assembly of the Magnet System for Wendelstein 7-X

Wegener

2012

IEEE Trans. Appl. Supercond.

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Abstract-Wendelstein 7-X represents the continuation of fusion experiments of the stellarator type at the Max-PlanckInstitute for Plasma Physics. The size of device (725 t, height of 5 m, diameter 16 m) and the superconductive magnet system distinguish W7-X from earlier stellarators at the Max-Planck Institute. The paper describes the technologies and methods used for the assembly of the magnet system and it compiles the experiences gained. The assembly of the W7-X facility will be accomplished in 2014.

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Section: A Semi Modules (Sm)mentioning

confidence: 99%

“…Each coil has got two extensions which are bolted to the ring segment [4]. The contact area at the extensions is designed as 5-sided form lock, i.e., at each side a customized 200 mm long wedge has to be welded to the extension to fill the as-built gap between coil-extension and the ring.…”

Section: A Semi Modules (Sm)mentioning

confidence: 99%

Experiences From the Assembly of the Magnet System for Wendelstein 7-X

Wegener

2012

IEEE Trans. Appl. Supercond.

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“…All critical support elements have been tested, using adequate mock-ups, and benchmarked with local FE models [26,32,33,34]. A special conservative analysis procedure, taking into account the structural material degradation at 4K in the form of serration effects, has been developed and implemented to accept local plastification in the support elements [35,36,37].…”

Section: Structural Stability Of the Superconducting Coil Systemmentioning

confidence: 99%

Technical challenges in the construction of the steady-state stellarator Wendelstein 7-X

Bosch¹,

Wolf²,

Andreeva³

et al. 2013

Nucl. Fusion

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The next step in the Wendelstein stellarator line is the large superconducting device Wendelstein 7-X, currently under construction in Greifswald, Germany. Steady-state operation is an intrinsic feature of stellarators, and one key element of the Wendelstein 7-X mission is to demonstrate steady-state operation under plasma conditions relevant for a fusion power plant. Steady-state operation of a fusion device, on the one hand, requires the implementation of special technologies, giving rise to technical challenges during the design, fabrication and assembly of such a device. On the other hand, also the physics development of steady-state operation at high plasma performance poses a challenge and careful preparation. The electron cyclotron resonance heating system, diagnostics, experiment control and data acquisition are prepared for plasma operation lasting 30 min. This requires many new technological approaches for plasma heating and diagnostics as well as new concepts for experiment control and data acquisition.

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“…The lateral support elements which connect the coils along the outside forming a "helical belt" will be constructed from half boxes which are inserted and welded between the coils. A test programme was launched to assess the magnitude and reproducibility of the weld shrinkages and to predict the distortions of the magnets [6]. Narrow support elements are arranged along the inner side of neighbouring coils.…”

Section: Inter-coil Supportsmentioning

confidence: 99%

Construction and assembly of WENDELSTEIN 7-X

Wanner

2006

Fusion Engineering and Design

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WENDELSTEIN 7-X (W7-X) is an optimised stellarator which shall demonstrate the reactor relevance of the HELIAS type magnetic configuration. The magnet configuration is produced by a set of 50 non-planar and 20 planar superconducting coils. These coils allow varying the magnetic configuration and studying the plasma in a wide range of parameters. The coil system is supported by a massive support structure and thermally protected by a cryostat. Many components of W7-X are in an advanced stage of construction and several of the main components have been delivered. Following comprehensive trials to ensure that the specified accuracy can be met, assembly has started in April 2005. The paper describes the status of construction and assembly and focuses on lessons learned during fabrication of the components.

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Design and test of the support elements of the W7-X magnet system

Cited by 10 publications

References 3 publications

Experiences From the Assembly of the Magnet System for Wendelstein 7-X

Experiences From the Assembly of the Magnet System for Wendelstein 7-X

Technical challenges in the construction of the steady-state stellarator Wendelstein 7-X

Construction and assembly of WENDELSTEIN 7-X

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