A physical model and numerical method for losses investigation in superconducting cable-in-conduit conductors (CICC)

Lelekhov, S.A.

doi:10.1016/j.cryogenics.2005.03.008

Cited by 10 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the relevant set of magnetic parameters is the pair ((𝑛𝜅 1 , 𝜏 1 ) , (𝑛𝜅 2 , 𝜏 2 )) where the first set can be related to the first stage contribution and the second set to the second stage one. We also showed that diagonalizing [𝜏] in (1) or only its central part by using (3) will give nearly identical pairs of parameters ((𝑛𝜅 1 𝜏 1 ), (𝑛𝜅 2 𝜏 2 )). This is due to the small norm of the terms (𝜏 00 , 𝜏 01 , 𝜏…”

Section: System Reductionmentioning

confidence: 74%

See 1 more Smart Citation

Analytical Coupling Losses Modelling With COLISEUM: Generalized Approach Upgrade to All Stages

Chiletti

Duchateau

Louzguiti

et al. 2021

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Predicting analytically the coupling losses generated in a cable for fusion magnets is still a significant challenge. Difficulties are related to the complex geometry of the system: several multi-strand stages embedded in one another with different twist pitches length, difficulty to model multiplets of strands, including compaction to the final shape. A two-stage analytical geometry based model (COLISEUM) has previously been developed at CEA. We try to extend it to any n-stage cables We detail here an iterative enhancement method to an n-stage model . We validated it against experimental data and shown that it is robust enough to fit our measured coupling losses. Finally, this upgraded model can be used to assess coupling losses in fusion nstage cables in a particularly precise way from only geometrical information and analytical tools .

show abstract

Section: System Reductionmentioning

confidence: 74%

“…OUPLING losses modelling of CICC for fusion magnets remains a domain of interest as seen in [1], [2], [3], [4], [5] and are often obtained by using numerical codes as in [2] or [6]. We propose here an analytical general method applicable to any 𝑛-stage cable to reach this objective.…”

Section: Introductionmentioning

confidence: 99%

Analytical Coupling Losses Modelling With COLISEUM: Generalized Approach Upgrade to All Stages

Chiletti

Duchateau

Louzguiti

et al. 2021

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…As result of our previous numerical [6] and experimental [2] investigation of the forced flow cabling conductors some interesting evidence was found, in particular:…”

Section: Experimental Method Test Facility and Samplementioning

confidence: 85%

“…However, we could only measure the helium temperature, but not the strand temperature. It is shown in [6] that the difference between the final temperature of helium and maximum temperature of strand can be relevant (Fig. 7).…”

Section: B Determination Of Energy Input To the Samplementioning

confidence: 96%

See 1 more Smart Citation

Eddy Current Loss in Superconducting Cable-in-Conduit Conductor (CICC)

Lelekhov¹,

Кейлин

Ковалев

et al. 2012

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

The Conductor of the toroidal field (TF) coils in Tokamaks are exposed to high amplitude pulse magnetic field (PMF) parallel to conductor axis during plasma disruption. A new experimental method for losses investigation in superconducting cable-in-conduit conductor (CICC) was used in this work. The method is based on a high sensibility of gas pressure in a closed volume to the energy input and allows measuring hysteresis losses with sufficient precision (when the decay rate of PMF is small) and the sum of hysteresis and eddy current losses (when the decay rate of PMF is high). Eddy current losses are rather higher than the coupling ones in CICC when PMF is parallel to the conductor axis. Therefore short samples (length is smaller than the last twist pitch) can be used for such investigations. The test facility for investigating the losses was developed and manufacturing at the "Kurchatov Institute". The sample of the ITER TF conductor was exposed to PMF with different amplitude and electromagnetic time constant. As result of the experimental investigation the electromagnetic time constant and the resistivity of the bundle were determined. The maximum temperature of the strands during PMF exposure was calculated numerically.

show abstract

Effect of voltage–current characteristic smoothness on the stability margin of cable-in-conduit conductors

Lelekhov

Naumov

2007

Cryogenics

View full text Add to dashboard Cite

A physical model and numerical method for losses investigation in superconducting cable-in-conduit conductors (CICC)

Cited by 10 publications

References 2 publications

Analytical Coupling Losses Modelling With COLISEUM: Generalized Approach Upgrade to All Stages

Analytical Coupling Losses Modelling With COLISEUM: Generalized Approach Upgrade to All Stages

Eddy Current Loss in Superconducting Cable-in-Conduit Conductor (CICC)

Effect of voltage–current characteristic smoothness on the stability margin of cable-in-conduit conductors

Contact Info

Product

Resources

About