Development and Test of the ITER Conductor Joints for the Central Solenoid

Martovetsky, N.; Manahan, R.; Jayakumar, R. J.; Michael, P.; Gung, C.; Minervini, J.V.; Randall, R.; Zhukovsky, A.

doi:10.13182/fst98-a11963713

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…The joints in any high current magnet like the CSMC and the CS Insert are very important elements, which could have become the limiting factor in the CSMC overall performance. Two types of 46 kA joints for the CSMC were developed and tested during an extensive R&D program 8,9 : a lap joint and a butt joint. The requirements to have a low resistance, low DC and AC losses and high reliability in a high field and high dB/dt environment made the joints quite complicated.…”

Section: Jointsmentioning

confidence: 99%

First Test Results on ITER CS Model Coil and CS Insert

Martovetsky¹,

Michael

Minervini

et al. 2001

Fusion Technology

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Section: Jointsmentioning

confidence: 99%

First Test Results on ITER CS Model Coil and CS Insert

Martovetsky¹,

Michael

Minervini

et al. 2001

Fusion Technology

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“…Coupling of the terminations of these high current carrying coils is realised by highly performing, electrical joints. The joints are required to transfer high currents at low DC resistance (Martovetsky et al, 1998), and are simultaneously submitted to fast varying high magnetic fields, imposing large radial and axial forces. As a result of being one of the main resistive components, the joints are delicate components of the magnet system.…”

Section: Introductionmentioning

confidence: 99%

Extensive Characterisation of Copper-clad Plates, Bonded by the Explosive Technique, for ITER Electrical Joints

Langeslag

Sgobba

Libeyre³

et al. 2015

Physics Procedia

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Cable-in-conduit conductors will be extensively implemented in the large superconducting magnet coils foreseen to confine the plasma in the ITER experiment. The design of the various magnet systems imposes the use of electrical joints to connect unit lengths of superconducting coils by inter-pancake coupling. These twin-box lap type joints, produced by compacting each cable end in into a copper -stainless steel bimetallic box, are required to be highly performing in terms of electrical and mechanical properties. To ascertain the suitability of the first copper-clad plates, recently produced, the performance of several plates is studied. Validation of the bonded interface is carried out by determining microstructural, tensile and shear characteristics. These measurements confirm the suitability of explosion bonded copper-clad plates for an overall joint application. Additionally, an extensive study is conducted on the suitability of certain copper purity grades for the various joint types.

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“…Both types of joint have advantages and disadvantages. The lap joint design is more structurally reliable and offers a better uniformity in current distribution [2]. The butt joint had lower AC losses and was insensitive to orientation of the transverse varying magnetic field [3].…”

Section: Introductionmentioning

confidence: 99%

Development of the Butt Joint for the ITER Central Solenoid

Martovetsky

2007

IEEE Trans. Appl. Supercond.

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Abstract-The ITER Central Solenoid (CS) requires compact and reliable joints for its Cable-in-Conduit Conductor (CICC).The baseline design is a diffusion bonded butt joint. In such a joint the mating cables are compacted to a very low void fraction in a copper sleeve and then heat treated. After the heat treatment the ends are cut, polished and aligned against each other and then diffusion bonded under high compression in a vacuum chamber at 750 C. The jacket is then welded on the conductor to complete the joint, which remarkably does not require more room than a regular conductor. This joint design is based on a proven concept developed for the ITER CS Model Coil that was successfully tested in the previous R&D phase.

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Development and Test of the ITER Conductor Joints for the Central Solenoid

Cited by 8 publications

References 3 publications

First Test Results on ITER CS Model Coil and CS Insert

First Test Results on ITER CS Model Coil and CS Insert

Extensive Characterisation of Copper-clad Plates, Bonded by the Explosive Technique, for ITER Electrical Joints

Development of the Butt Joint for the ITER Central Solenoid

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