1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Upgrade of the LHC main RF system for HL-LHC

MOPM101
2 Jun 2025, 16:00
2h
Exhibiton Hall A _Magpie (TWTC)

Exhibiton Hall A _Magpie

TWTC

Poster Presentation MC1.A01 Hadron Colliders Monday Poster Session

Speaker

Birk Emil Karlsen-Bæck (European Organization for Nuclear Research)

Description

In the era of the High-Luminosity Large Hadron Collider (HL-LHC), the main RF system will be limited in voltage and power on the injection plateau due to strong beam loading. At the same time, significant start-of ramp losses, that are originating from capture and flat bottom losses, are expected and can severely impact machine availability or even prevent the beam from reaching the collision energy. In this contribution, we present the recent experience with high-intensity beams during operation and dedicated measurements to give an update on the estimated RF voltage reach for HL-LHC beam parameters. Projections for beam losses at capture, along the flat bottom, and at the start of the ramp are calculated, taking into account also the effect of intra-beam scattering. We discuss in detail the mitigation measures put in place, such as high-efficiency klystrons, the revision of beam loss monitor thresholds at the start of the ramp, and automatic working point optimization.

Funding Agency

Research supported by the HL-LHC project

Region represented Europe
Paper preparation format LaTeX

Author

Helga Timko (European Organization for Nuclear Research)

Co-authors

Andrew Butterworth (European Organization for Nuclear Research) Birk Emil Karlsen-Bæck (European Organization for Nuclear Research) Chiara Marrelli (European Organization for Nuclear Research) Katarzyna Turaj (European Organization for Nuclear Research) Michail Zampetakis (European Organization for Nuclear Research) Nuria Catalan-Lasheras (European Organization for Nuclear Research) Rama Calaga (European Organization for Nuclear Research)

Presentation materials

There are no materials yet.