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Luca Bottura

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Publications associées (45)

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Analysis of Defective Interconnections of the 13 kA LHC Superconducting Bus Bars

Luca Bottura, Pier Paolo Granieri

The interconnections between Large Hadron Collider (LHC) main dipole and quadrupole magnets are made of soldered joints of two superconducting cables stabilized by a copper bus bar. The 2008 incident revealed the possible presence of defects in the interco ...

Ieee-Inst Electrical Electronics Engineers Inc2012

Protection estimates for the 13 kA bus bars interconnections at 3.5 - 4.5 TeV

Luca Bottura, Pier Paolo Granieri

This memorandum provides alternate estimates of the critical additional resistance Radd of the 13 kA superconducting bus bars interconnections (IC), both for the LHC main bending (MB) dipole and main quadrupole (MQ) magnets. The calculations are performed ...

2012

Stability analysis of the Interconnection of the LHC Main Superconducting Bus Bars

Luca Bottura, Pier Paolo Granieri

The operation of the Large Hadron Collider calls for a thorough analysis of the thermo-electric behavior of the 13 kA superconducting bus-bars connecting its dipole and quadrupole main magnets. This presentation reports a synthesis of the work performed jo ...

2011

Quench analysis of a high-current forced-flow HTS conductor model for fusion magnets

Rainer Wesche, Luca Bottura

A fundamental understanding of the quench phenomenon is particularly important in the design and operation of magnets using High Temperature Superconductors because the quench propagation velocity is low due to high specific heat at high temperature. We ha ...

2011

Friction factor correlation for CICC's based on a porous media analogy

Luca Bottura

We use an analogy to porous media to derive a correlation for the friction factor in CICC s We start with a review of selected literature work on this topic We then recall the principles of the porous medium analogy and present the main body of our work on ...

2010

A parametric AC loss model of the ITER coils for control optimization

Luca Bottura

A recent study on AC loss calculation in different operating regimes of relevance for ITER plasma control has shown that AC loss calculations can be performed on a model with a level of complexity and completeness not achieved so far [L. Bottura, P Bruzzon ...

Elsevier2010

Transient Heat Transfer Model and Stability Analysis of helium-cooled Superconducting Cables

Luca Bottura, Pier Paolo Granieri, Panagiota Xydi

The stability is a key issue to design superconducting magnets and to ensure their proper exploitation. This is the case of the imminent operation of the Large Hadron Collider (LHC) accelerator, which requires a good knowledge of the stability margin of it ...

2008

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The commissioning and the exploitation of the LHC require a good knowledge of the stability margins of the superconducting magnets with respect to beam induced heat depositions. Previous studies showed that simple numerical models are suitable to carry out ...

2008

Simulation of the flow-reversal effect in dual-channel CICC for ITER

Pierluigi Bruzzone, Luca Bottura

The discovery of an upward counter flow of helium in the outer annulus of the vertically oriented and top-to-bottom cooled ITER PF-FSJS (Poloidal Field Coil-Full Size Joint Sample) in 2002 led to closer investigations of the effect because it may lead to a ...

2007