Sensitivity Analysis of $T_{cs}$ Measurement on ITER TF Conductors

Bessette, D.; Breschi, Marco; Calzolaio, Ciro; Devred, A.; Menarini, Marco; Seo, K.

doi:10.1109/tasc.2009.2039927

Cited by 18 publications

(20 citation statements)

References 8 publications

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“…In particular, a sample was tested from about 25 % of the series production Unit Lengths. 3 In order to make the results of the tests comparable and reproducible, a remarkable effort was devoted to the development of suited sample preparation, instrumentation sets and test procedures [5], [9], [10]. These developments, associated with the massive production of ITER conductors, led to the creation of the largest technical database on Nb3Sn Cable in Conduit Conductors ever assembled.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of the toroidal field ITER production conductors

Breschi

Macioce

Devred

2017

Supercond. Sci. Technol.

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The production of the superconducting cables for the toroidal field (TF) magnets of the ITER machine has recently been completed at the manufacturing companies selected during the previous qualification phase. The quality assurance/quality control programs that have been implemented to ensure production uniformity across numerous suppliers include performance tests of several conductor samples from selected unit lengths. The short full-size samples (4 m long) were subjected to DC and AC tests in the SULTAN facility at CRPP in Villigen, Switzerland.In a previous work the results of the tests of the conductor performance qualification samples were reported. This work reports the analyses of the results of the tests of the production conductor samples. The results reported here concern the values of current sharing temperature, critical current, effective strain and n-value from the DC tests and the energy dissipated per cycle from the AC loss tests. A detailed comparison is also presented between the performance of the conductors and that of their constituting strands.

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Section: Introductionmentioning

confidence: 99%

Performance analysis of the toroidal field ITER production conductors

Breschi

Macioce

Devred

2017

Supercond. Sci. Technol.

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“…One is estimating the average E-field inside the CICC sample, and the other is a caloric measurement using temperature differences. Studies on the accuracy of the techniques have concluded that the caloric measurement has a greater uncertainty than the E-field estimation approach [13], [14]. In addition, significant deviations from constant He mass flow through the test sample occur during measurements, complicating the caloric approach.…”

Section: Test Proceduresmentioning

confidence: 99%

Preliminary Performance Test Results of First CICC From Korea Destined for an ITER TF Magnet

Kwon

Park

Stepanov

et al. 2013

IEEE Trans. Appl. Supercond.

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The Republic of Korea is participating in the ITER project to construct and operate the ITER tokamak for the purpose of demonstrating the feasibility of fusion power. ITER Korea, the implementing agency for the Republic of Korea that is procuring items for the ITER project on behalf of the Korean government, has established domestic and international contracts for the procurement of cable-in-conduit conductor (CICC) that will be used in the ITER toroidal field (TF) magnets. The CICC for the ITER TF magnets is made of superconducting Nb 3 Sn and copper strand cable inside a cylindrical stainless steel jacket, and is designed to operate at a nominal peak field of 11.8 T at 4.5 K with 68 kA of nominal operating current. Recently, the first CICC from Korea, which will be installed in an ITER TF magnet, has been manufactured and tested including testing performed on a 4 m sample near ITER operating conditions at the CRPP-EPFL SULTAN facility in Villigen, Switzerland under the coordination of the ITER International Organization. This paper provides a brief description of the CICC along with preliminary results of the tests and the conductor performance characteristics derived from the results.

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“…After each current/temperature step, a constant phase of current/temperature allows the relaxation of the electrodynamic and thermal transients towards a steady state. As specified in [8], the characteristics of the cable is obtained associating the average electric field measured at each step with the average temperature measured by the 8 sensors located upstream and downstream of the HFZ.…”

Section: Experimental Facilitymentioning

confidence: 99%

Error Estimation in the $T_{cs}$ Measurement of TF Conductors in the SULTAN Facility

Breschi

Ribani

Bessette

et al. 2012

IEEE Trans. Appl. Supercond.

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The main parameter measured in the tests of the TF conductors for the ITER machine is the current sharing temperature . In the voltmetric assessment of , the voltages are measured on the conductor jacket, due to the technical difficulties to introduce voltage taps inside the stainless steel conduit. The average voltages measured on the jacket do not exactly correspond to those that arise along the single strands, as shown by the presence of early voltages arising during the current ramp up, when the cable is still in the superconducting phase. It is therefore not trivial to evaluate the difference between the cable and jacket voltages, that gives rise to an experimental error in the measurement of . This paper reports the results of a vast simulation campaign performed with a detailed electromagnetic model of the Cable in Conduit Conductor, in which the origin and the extent of these differences have been investigated, giving an estimate for the experimental error. The impact on measurements of other sources of error such as the signal/noise ratio and the error in the temperature measurements is also reported.Index Terms-Cable in conduit conductors, error estimation, measurement.

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Sensitivity Analysis of $T_{cs}$ Measurement on ITER TF Conductors

Cited by 18 publications

References 8 publications

Performance analysis of the toroidal field ITER production conductors

Performance analysis of the toroidal field ITER production conductors

Preliminary Performance Test Results of First CICC From Korea Destined for an ITER TF Magnet

Error Estimation in the $T_{cs}$ Measurement of TF Conductors in the SULTAN Facility

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