Steady state and transient current lead analysis [superconducting cables]

Citver, G.; Barzi, E.; Burov, A.A.; Fehér, S.; Limon, P.; Peterson, T.

doi:10.1109/77.783348

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…All of the measured values show good agreement with calculations [1]. Both current leads were able to operate with no helium flow through the lead.…”

Section: Test Resultssupporting

confidence: 75%

“…Both temperature and voltage values were stable but not constant; temperature showed periodic behaviour correlated with current, as one would expect. Extensive thermal studies on the copper section, including temperature profiles as a function of nitrogen flow rates and transient effects due to sudden change of the current or nitrogen flow rate, were performed on the IGC lead and the results were compared with calculations [1]. A fast response to transients was found.…”

Section: Test Resultsmentioning

confidence: 99%

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HTS power lead test results

Citver

Fehér

Limon³

et al. 1999

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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“…All of the measured values show good agreement with calculations [1]. Both current leads were able to operate with no helium flow through the lead.…”

Section: Test Resultssupporting

confidence: 75%

Section: Test Resultsmentioning

confidence: 99%

HTS power lead test results

Citver

Fehér

Limon³

et al. 1999

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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“…The temperature profile of the upper copper section of the ASC lead was estimated by using a mathematical model developed for analyzing R&D current leads at Fermilab [4].…”

Section: ) DC and Ac Stability Testmentioning

confidence: 99%

Tevatron HTS Power Lead Test

Fehér

Carcagno

Orris

et al. 2005

IEEE Trans. Appl. Supercond.

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Two pairs of ASC 6 kA power leads developed for the Tevatron were successfully tested at Fermilab at over-current conditions. Stable operation was achieved while operating at a current of 9.56 kA for five hours and while continuously ramping between 0-9.56 kA at a ramp rate of 200 A/s for one hour. The minimum required liquid nitrogen flow rate was measured to be 1.5 g/s at 10 kA. After ramping up to 10 kA at 200A/s, it took only 15 minutes to stabilize the upper copper section of the lead with a flow of 1.8 g/s of liquid nitrogen vapor. Testing under extreme operating conditions-270-370 kPa liquid nitrogen vapor pressure and over 0.1 T external magnetic fielddemonstrated that the HTS part of the lead can safely operate in the current sharing mode and that this design has large operating margin.

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“…operating system [3], the LHC will be the first to incorporate a large number of HTS leads in a large scale accelerator system. An important effort has therefore been put into converging, for the series production, on a lead design able to guarantee good thermo-electrical performance together with characteristics of compactness, robustness and safety of the components.…”

mentioning

confidence: 99%

Current leads for the LHC magnet system

Ballarino

2002

IEEE Trans. Appl. Supercond.

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Abstract-The LHC current lead project is now entering into the stage of procurement of the components for integration into the machine. About 3300 current leads with ratings ranging from 60 A to 13 000 A will be required for powering the numerous electrical circuits. The main design choices have been taken on the basis of the outcome of an intensive R&D program covering the characterization of suitable High Temperature Superconducting (HTS) materials for current leads, the validation of lead design options and the measurement of the thermo-electrical performance of prototypes tested under various operating conditions. Helium gas cooled leads integrating HTS material at the colder end will be used for high current leads (currents 600 A), while the corrector dipole magnets (60 A-120 A) will be powered via specifically designed conduction-cooled resistive leads. An outline of the retained designs will be presented, together with required schedule for lead manufacture.

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Steady state and transient current lead analysis [superconducting cables]

Cited by 5 publications

References 10 publications

HTS power lead test results

HTS power lead test results

Tevatron HTS Power Lead Test

Current leads for the LHC magnet system

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