Publication

Beam-Machine Interaction Studies for the Phase II LHC Collimation System

Luisella Lari
2010
Theses

Résumé

Collimation is essential in a high Energy and Intensity hadron collider with SuperConducting magnets, like the LHC at CERN. To improve the cleaning efficiency and to reduce the LHC impedance budget in stable condition and at top Energy, additional 30 Phase II collimators are foreseen to be installed. The work of this PhD analyses the beam-machine interactions in the LHC Betatron Cleaning Insertions for its upgrade with the Phase II collimators. These studies aim at optimizing the collimation system layout from the machine protection point of view, considering different options for the Phase II collimator design and focusing on heating damage and activation problems. The outcomes of this PhD work have been used to support the Phase II design evolution and their prototype mechanical integration, and to point out possible critical points along the Betatron Cleaning Straight Section. Emphasis is on studying several configurations and material choices for nominal and failure scenarios.

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https://infoscience.epfl.ch/entities/publication/7c315a86-404b-467c-863b-694ffa978e79

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Luisella Lari
2010
Theses

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/7c315a86-404b-467c-863b-694ffa978e79

À propos de ce résultat

Concepts associés (24)

Superconducting magnet

A superconducting magnet is an electromagnet made from coils of superconducting wire. They must be cooled to cryogenic temperatures during operation. In its superconducting state the wire has no electrical resistance and therefore can conduct much larger electric currents than ordinary wire, creating intense magnetic fields. Superconducting magnets can produce stronger magnetic fields than all but the strongest non-superconducting electromagnets, and large superconducting magnets can be cheaper to operate because no energy is dissipated as heat in the windings.

Supraconductivité

La supraconductivité, ou supraconduction, est un phénomène physique caractérisé par l'absence de résistance électrique et l'expulsion du champ magnétique — l'effet Meissner — à l'intérieur de certains matériaux dits supraconducteurs. La supraconductivité découverte historiquement en premier, et que l'on nomme communément supraconductivité conventionnelle, se manifeste à des températures très basses, proches du zéro absolu (). La supraconductivité permet notamment de transporter de l'électricité sans perte d'énergie.

Superconducting wire

Superconducting wires are electrical wires made of superconductive material. When cooled below their transition temperatures, they have zero electrical resistance. Most commonly, conventional superconductors such as niobium–titanium are used, but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.

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