ScholarLens Back to search
2011•CERN Document Server (European Organization for Nuclear Research)Open access

LHC Machine Protection Against Very Fast Crab Cavity Failures

Tobias Baer, J. Wenninger, Rogelio Tomás, R. Calaga, Frank Zimmermann, Joachim Tückmantel

Open full text 5 citations

Abstract

For the high-luminosity LHC upgrade program (HLLHC), the installation of crab cavities (CCs) is essential to compensate the geometric luminosity loss due to the crossing angle [1]. The baseline is a local scheme with CCs around the ATLAS and CMS experiments. In a failure case (e.g. a CC quench), the voltage and/or phase of a CC can change significantly with a fast time constant of the order of a LHC turn [2]. This can lead to large, global betatron oscillations of the beam. Against the background of machine protection, the influence of a CC failure on the beam dynamics is discussed. The results from dedicated tracking studies, including the LHC upgrade optics, are presented. Necessary countermeasures to limit the impact of CC failures to an acceptable level are proposed.

Open-access reader

About this research paper

What this paper is about

For the high-luminosity LHC upgrade program (HLLHC), the installation of crab cavities (CCs) is essential to compensate the geometric luminosity loss due to the crossing angle [1]. The baseline is a local scheme with CCs around the ATLAS and CMS experiments. In a failure case (e.g. a CC quench), the voltage and/or phase of a CC can change significantly with a fast time constant of the order of a LHC turn [2]. This can lead to large, global betatron oscillations of the beam. Against the background of machine protection, the influence of a CC failure on the beam dynamics is discussed. The results from dedicated tracking studies, including the LHC upgrade optics, are presented. Necessary countermeasures to limit the impact of CC failures to an acceptable level are proposed.

Why it matters

OpenAlex reports 5 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

For the high-luminosity LHC upgrade program (HLLHC), the installation of crab cavities (CCs) is essential to compensate the geometric luminosity loss due to the crossing angle [1]. The baseline is a local scheme with CCs around the ATLAS and CMS experiments. In a failure case (e.g. a CC quench), the voltage and/or phase of a CC can change significantly with a fast time constant of the order of a LHC turn [2]. This can lead to large, global betatron oscillations of the beam. Against the background of machine protection, the influence of a CC failure on the beam dynamics is discussed. The results from dedicated tracking studies, including the LHC upgrade optics, are presented. Necessary countermeasures to limit the impact of CC failures to an acceptable level are proposed.

Key concepts: Large Hadron Collider, Betatron, Upgrade, Physics, Luminosity, Beam (structure), Nuclear physics, Atlas (anatomy)

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
LHC Machine Protection Against Very Fast Crab Cavity Failures — Research Paper | ScholarLens