Testing of RF 100 m TF Qualification Conductor in the SULTAN Test Facility

Tronza, V.; Pantsyrny, V.; Stepanov, B.; Bruzzone, Pierluigi; Paramonov, A. V.; Kochetov, M. V.; Kaverin, D. S.; Shutov, K. A.; Vysotsky, V.S.; Vorobieva, A.; Abdyukhanov, I. M.; Polikarpova, M.

doi:10.1109/tasc.2013.2243798

Cited by 8 publications

(6 citation statements)

References 8 publications

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“…In this case, all samples but one met the 5.8 K after 1000 EM cycles. Looking at the details of the results, it appears that all RF samples show good performance with no cycling degradation (there is even usually a small increase of T Cs over the first 50 to 100 EM cycles, the origin of which will be discussed later) [57][58]. The EU samples are reproducible, but appear very close to the limit after EM cycling (this particular conductor design was optimized to perform in such fashion) [54].…”

Section: Sultan Sample Summarymentioning

confidence: 93%

Challenges and status of ITER conductor production

Devred

Backbier

Bessette

et al. 2014

Supercond. Sci. Technol.

171

118

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Taking the relay of the Large Hadron Collider (LHC) at CERN, ITER has become the largest project in applied superconductivity. In addition to its technical complexity, ITER is also a management challenge as it relies on an unprecedented collaboration of 7 partners, representing more than half of the world population, who provide 90% of the components as in-kind contributions. The ITER magnet system has a stored energy of 51 GJ and involves 6 of the ITER partners. The coils are wound from Cable-In-Conduit Conductors (CICCs) made up of superconducting and copper strands assembled into a fully transposed, rope-type cable, inserted into a conduit of butt-welded austenitic steel tubes. The conductors for the Toroidal Field (TF) and Central Solenoid (CS) coils require about 500 tons of Nb 3 Sn strands while the Poloidal Field (PF) and Correction Coil (CC) and busbar conductors need around 250 tons of Nb-Ti strands. The required amount of Nb 3 Sn strands far exceeds pre-existing industrial capacity and has called for a significant worldwide production scale up. The TF conductors are the first ITER components to be mass produced and are more than 50% complete. During its life time, the CS coil will have to sustain several tens of thousands of electromagnetic (EM) cycles to high current and field conditions, way beyond anything a large Nb 3 Sn coil has ever experienced. Following a comprehensive R&D program, a technical solution has been found for the CS conductor, which ensures stable performance versus EM and thermal cycling. Productions of PF, CC and busbar conductors are also underway. After an introduction to the ITER project and magnet system, we describe the ITER conductor procurements and the Quality Assurance/Quality Control programs that have been implemented to ensure production uniformity across numerous suppliers. Then, we provide examples of technical challenges that have been encountered and we present a status of ITER conductor production worldwide.

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Section: Sultan Sample Summarymentioning

confidence: 93%

Challenges and status of ITER conductor production

Devred

Backbier

Bessette

et al. 2014

Supercond. Sci. Technol.

171

118

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“…The main dimensions of the samples are approximately the same. The results of the tests of all samples were sufficient and met ITER requirements [6][7][8]. However the results of the TF samples tests were quite unexpected because no current sharing temperature (T cs ) degradation was observed [6,7].…”

Section: Tf and Pf Conductorsmentioning

confidence: 60%

Progress with the ITER project activity in Russia

Krasilnikov¹,

Abdyuhanov

Aleksandrov³

et al. 2015

Nucl. Fusion

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Due to the development of the ITER project, the requirements of the technical parameters of the ITER systems were more precisely and practically determined to be at higher levels. The essential increase of the ITER system characteristics happened recently. A number of prototypes were manufactured and tests were carried out. The results of the development and manufacture of 25 ITER systems, subject to the Russian Federation's obligations in the ITER project, are described.

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“…We also attempted to compare our results with [6], where the strands from the TFEU5 conductor were examined. The drop of T cs after testing in SULTAN in TFEU5 was 0.35 K [6] against 0.1 K in TFRF3 [8]. We have converted our results into cracks/mm terms used in [6].…”

Section: Discussionmentioning

confidence: 99%

“…For the TFRF3 sample the results of Tcs measurements performed during electromagnetic cycling were stable between 6.10-6.15 K [8]. The only drop of 0.1 K was observed after warm-up and cool down (WUCD) with the final Tcs value of 6.05 K. Considering the value of the drop, this sample shows very good stability and EM cycling resistance among other ITER conductors where the average difference between initial and final Tcs values reaches up 0.4 K [1].…”

Section: Introductionmentioning

confidence: 91%

“…To study the effect of electromagnetic and thermal loads following a test in the SULTAN (1000 current -high field EM cycles and one thermal cycle), the strands were extracted from the high field zone (HFZ) of TFRF3 sample, which was tested after heat treatment with cycle "B" (210°C for 50 hours, 340°C for 25 hours, 450°C for 25 hours, 575°C for 100 hours and 650°C for 100 hours) [8].…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

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Analysis of Nb3Sn Strand Microstructure After Full-size SULTAN Test of ITER TF Conductor Sample

et al. 2015

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The study of defects generated in superconducting filaments of Nb 3 Sn strands under electromagnetic and thermal cycling was carried out for the TFRF3 cable-in-conduit-conductor (CICC) sample that passed final testing in the SULTAN test facility. The TFRF3 sample was manufactured for the qualification of the RF Toroidal Field (TF) CICC. The strand samples were taken from different locations in the cross-section of TFRF3 and different positions along its axis in relation to background magnetic field. Qualitative and quantitative analysis of defects were carried out using metallographic analysis of images obtained by Laser Scanning Microscope. We analyzed number, type, and distribution of defects in filaments of the Nb 3 Sn strand samples extracted from different petals of TFRF3 in dependence on the strand location in the cross-section (the center of petal, nearby the spiral, nearby the outer jacket) in the high field zone (HFZ). The results about the defects amount and their distribution are presented and discussed.

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Testing of RF 100 m TF Qualification Conductor in the SULTAN Test Facility

Cited by 8 publications

References 8 publications

Challenges and status of ITER conductor production

Challenges and status of ITER conductor production

Progress with the ITER project activity in Russia

Analysis of Nb3Sn Strand Microstructure After Full-size SULTAN Test of ITER TF Conductor Sample

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