Pre-Design of the Superconducting Magnet System for Magnum-psi

Abstract-DIFFER's main experiment Magnum-PSI is the only laboratory setup in the world capable of exposing materials to plasma conditions similar to those of future fusion reactors. The success of the Magnum-PSI experiment depends on the generation of a 2.5 T magnetic field without restricting the diagnostic access and operational aspects of the experiment.This has been achieved with a magnet consisting of five superconducting solenoids wound on a 2.5 m long stainless steel coil former positioned in a cryostat offering a 1.25 m warm bore. A copper stabilized multifilamentary NbTi conductor with a 3.48 mm 2 cross section has been used, thus the magnet exhibits a total inductance of 500 H and a stored energy of 16 MJ. This presents quite a challenge for the protection scheme that has been implemented using a mix of back-to-back cold diodes and external dump resistors.The coils generate a plateau shaped magnetic field adjustable up to 2.5 T while the distance between the coils allows for 16 room temperature view-ports. The coils are cooled with liquid helium using a re-condensing system operated with cryocoolers, while the magnet system cycles between zero and full field up to once per day. The magnetic stray field is shielded down to 1 mT outside the experimental area by iron walls that flank the magnet.  Index Terms-Fusion reactors, linear plasma generators, plasma-surface interaction, superconducting magnets.

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“…After a conceptual design study [9] and subsequent detailed design, a superconducting magnet was built according to the following specifications:…”

Section: A Requirementsmentioning

confidence: 99%

A 2.5-T, 1.25-m Free Bore Superconducting Magnet for the Magnum-PSI Linear Plasma Generator

Eck

Kate

Dudarev

et al. 2018

IEEE Trans. Appl. Supercond.

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“…The partly ionized gas leaves the arc with sonic speed and expands into the source chamber forming a shock structure. A strong steady state magnetic field of 3 T generated by a superconducting magnet system [15] confines the expanding plasma part to a beam diameter of 10 cm thus separating plasma and neutrals. The vacuum system is split in three chambers (source-, heating-and target chamber), separated by skimmers.…”

Section: General Overviewmentioning

confidence: 99%

Pre-design of Magnum-PSI: A new plasma–wall interaction experiment

Eck¹,

Koppers²,

Rooij³

et al. 2007

Fusion Engineering and Design

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“…The authors are closely involved in the building of a machine meeting most demands, called Magnum-PSI, at the FOM-Institute for Plasma Physics Rijnhuizen, as part of the TEC and the Euratom Association. 5,38…”

Section: Devices To Study the Plasma-surface Interactionmentioning

confidence: 99%

“…This apparatus, Magnum-psi, will be unique and provides an important new experimental facility for the range of experiments that are available to PSI research for ITER and reactors beyond ITER. 5,38 Magnum-psi will be described in detail elsewhere; an overview of the current design is shown in Fig. 9.…”

Section: An Experiments Under Development: Magnum-psimentioning

confidence: 99%

Plasma–surface interaction in the context of ITER

Kleyn

Cardozo

Samm

2006

Phys. Chem. Chem. Phys.

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The decreasing availability of energy and concern about climate change necessitate the development of novel sustainable energy sources. Fusion energy is such a source. Although it will take several decades to develop it into routinely operated power sources, the ultimate potential of fusion energy is very high and badly needed. A major step forward in the development of fusion energy is the decision to construct the experimental test reactor ITER. ITER will stimulate research in many areas of science. This article serves as an introduction to some of those areas. In particular, we discuss research opportunities in the context of plasma-surface interactions. The fusion plasma, with a typical temperature of 10 keV, has to be brought into contact with a physical wall in order to remove the helium produced and drain the excess energy in the fusion plasma. The fusion plasma is far too hot to be brought into direct contact with a physical wall. It would degrade the wall and the debris from the wall would extinguish the plasma. Therefore, schemes are developed to cool down the plasma locally before it impacts on a physical surface. The resulting plasma-surface interaction in ITER is facing several challenges including surface erosion, material redeposition and tritium retention. In this article we introduce how the plasma-surface interaction relevant for ITER can be studied in small scale experiments. The various requirements for such experiments are introduced and examples of present and future experiments will be given. The emphasis in this article will be on the experimental studies of plasma-surface interactions.

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Pre-Design of the Superconducting Magnet System for Magnum-psi

Cited by 5 publications

References 6 publications

A 2.5-T, 1.25-m Free Bore Superconducting Magnet for the Magnum-PSI Linear Plasma Generator

A 2.5-T, 1.25-m Free Bore Superconducting Magnet for the Magnum-PSI Linear Plasma Generator

Pre-design of Magnum-PSI: A new plasma–wall interaction experiment

Plasma–surface interaction in the context of ITER

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