Wendelstein 7-X, Overview and Status of Construction

Bosch, H.‐S.

doi:10.1109/fusion.2005.252849

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…This has been followed by further coils and TI. The status is given in [1]. The assembly of W7-X has been described in detail in [2].…”

Section: Introductionmentioning

confidence: 99%

Assembly Technology for the W7-X Stellarator

Hurd

2005

21st IEEE/NPS Symposium on Fusion Engineering SOFE 05

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Wendelstein 7-X is a super conducting Sellarator being constructed in Greifswald, Germany. The technology needed to assemble the basic-machine W7-X requires a complex integration of engineering disciplines from the accuracy of manufacture through to the metrology techniques and equipment to successfully assemble the machine. The spiral shape of the Stellarator vacuum vessel means the 70 coils must be threaded individually over the vacuum vessel. To avoid damage to the thermal insulation 5 axis lifting devices have been designed to thread coils into their final position.The distance between the coils is fixed by a series of radial and lateral support elements, central support elements and planar support elements, the assembly technology is being developed and tested by an extensive test programme.W7-X is equipped with 299 ports for diagnostics and supply of in vessel components; they connect the ICRH, ECRH and neutral injection systems to the plasma vessel. All ports must be positioned accurately at various angles around the vacuum vessel, ranging in weight from 100 kg up to 900 kg. For the ports this requires close integration of the manufacturing, metrology and assembly technologies. At present it is planned to use a powered ramp. It is planned that the ramp and its support structure will also be used to insert the thermal insulation of the port, the 'plug in' in vessel component supply bundles and possibly diagnostics. The bus bar system links all coils to the power supply system. Space constraints within the machine cryostat require compact super conducting joints which, have been designed and tested with a resistance in the range of lnOhm.The paper will give an overview of the various technologies being used to solve the assembly problems on the various components and the status of the assembly of the basic-machine.

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“…This has been followed by further coils and TI. The status is given in [1]. The assembly of W7-X has been described in detail in [2].…”

Section: Introductionmentioning

confidence: 99%

Assembly Technology for the W7-X Stellarator

Hurd

2005

21st IEEE/NPS Symposium on Fusion Engineering SOFE 05

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“…There are two main differences to the former experiments -the coils have a larger size and they are superconducting to allow steady state operation of the device. The coil system of W7-X consists of 50 non-planar coils and 20 planar coils [4].…”

Section: Introductionmentioning

confidence: 99%

Design Changes and Impact on the Production of the Non-Planar Coils for the W-7X Experiment

Riße

Sborchia

Valle

et al. 2006

IEEE Trans. Appl. Supercond.

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Abstract-The Max-Planck-Institut für Plasmaphysik is building the stellarator fusion experiment WENDELSTEIN 7-X (W7-X) at the branch institute in Greifswald, Germany. The 50 non-planar superconducting coils are currently manufactured by industry and use a specially developed NbTi cable-in-conduit conductor. The manufacture of the coils includes the conductor, winding of the conductor, vacuum pressure impregnation as well the embedding of the winding pack into a cast steel casing, the final machining and the installation of the helium cooling system on the casing. Design changes became necessary during production in the connection areas of the casings due to more detailed design and structural analysis. In addition, the insulation and the welds in the termination area need to be improved. New quench detection cables were qualified. LINAC inspections allowed to check the presence of casting defects in the thick casings. Additionally high voltage tests in vacuum under Paschen-minimum conditions turned out to be a very sensitive inspection method to check the integrity of the electrical insulation.

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The integral analysis of 40 mm diameter pipe rupture in cooling system of fusion facility W7-X with ASTEC code

Kačegavičius

Povilaitis

2015

Fusion Engineering and Design

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Wendelstein 7-X, Overview and Status of Construction

Cited by 4 publications

References 15 publications

Assembly Technology for the W7-X Stellarator

Assembly Technology for the W7-X Stellarator

Design Changes and Impact on the Production of the Non-Planar Coils for the W-7X Experiment

The integral analysis of 40 mm diameter pipe rupture in cooling system of fusion facility W7-X with ASTEC code

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