17–22 May 2026
C.I.D
Europe/Zurich timezone

Vacuum simulations for HL-LHC Long Straight Sections

MOP7100
18 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC7.T14: Vacuum Technology Poster session

Speaker

Alessio Galloro (European Organization for Nuclear Research)

Description

The High Luminosity Large Hadron Collider (HL-LHC) is entering its final development phase, requiring the optimisation of its vacuum layout to ensure reliable operation. The main upgrades with respect to the current LHC involve the Long Straight Sections next to the two large, general-purpose experiments (ATLAS and CMS), including new final focusing magnets and a full crab crossing implementation using superconducting crab cavities. Since residual gas critically affects collider performance, extensive vacuum simulations have been conducted to evaluate and minimise pressure levels. These include steady-state studies accounting for phenomena like photon, electron and ion-induced desorption, to determine pressure. The simulations employ several complementary tools: Molflow+ for Monte Carlo particle tracking in ultra-high vacuum conditions, Synrad+ for synchrotron radiation effects, and the MATLAB-based VASCO code for pressure stability analysis.

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Author

Alessio Galloro (European Organization for Nuclear Research)

Co-authors

Giuseppe Bregliozzi (European Organization for Nuclear Research) Josef Sestak (European Organization for Nuclear Research) Vincent Baglin (European Organization for Nuclear Research)

Presentation materials

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