The HL-LHC Accelerator Physics Challenges

Fartoukh, S.; Zimmermann, Frank

doi:10.1142/9789814675475_0004

Cited by 2 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a baseline, we envisage heavy-ion operation with β * = 0.5 m in IP1, IP2 and IP5 using a conventional LHC optics, i.e., without the achromatic telescopic squeeze (ATS). The ATS optics for p-p operation is being designed to maintain this functionality for Pb-Pb or p-Pb physics [11]. The changes in phase advance with respect to the previous optics may provide some additional tunability for β * < 0.5 m which can be explored although the beam-beam separation around ALICE may become marginal at small values of β * (see below).…”

Section: Optical Configurationmentioning

confidence: 99%

Heavy-Ion Operation of HL-LHC

Jowett

Schaumann

Versteegen

2015

The High Luminosity Large Hadron Collider

View full text Add to dashboard Cite

The heavy-ion physics programme of the LHC will continue during the HL-LHC period with upgraded detectors capable of exploiting several times the design luminosity for nucleus-nucleus (Pb-Pb) collisions. For proton-nucleus (p-Pb) collisions, unforeseen in the original design of the LHC, a comparable increase beyond the 2013 luminosity should be attainable. We present performance projections and describe the operational strategies and relatively modest upgrades to the collider hardware that will be needed to achieve these very significant extensions to the physics potential of the High Luminosity LHC.

show abstract

Section: Optical Configurationmentioning

confidence: 99%

Heavy-Ion Operation of HL-LHC

Jowett

Schaumann

Versteegen

2015

The High Luminosity Large Hadron Collider

View full text Add to dashboard Cite

show abstract

“…As the beam intensity increases, the beam can no longer be considered as a collection of non-interacting single particles: in addition to the "single-particle phenomena", "collective effects" become significant [1]. At low intensity a beam of charged particles moves around an accelerator under the Lorentz force produced by the "external" electromagnetic fields (from the guiding and focusing magnets, RF cavities, etc.).…”

Section: Introductionmentioning

confidence: 99%

Impedance and Component Heating

Métral¹,

Mounet²,

Caspers³

et al. 2015

The High Luminosity Large Hadron Collider

View full text Add to dashboard Cite

The impedance is a complex function of frequency, which represents, for the plane under consideration (longitudinal, horizontal or vertical), the force integrated over the length of an element, from a "source" to a "test" wave, normalized by their charges. In general, the impedance in a given plane is a nonlinear function of the test and source transverse coordinates, but it is most of the time sufficient to consider only the first few linear terms. Impedances can influence the motion of trailing particles, in the longitudinal and in one or both transverse directions, leading to energy loss, beam instabilities, or producing undesirable secondary effects such as excessive heating of sensitive components at or near the chamber wall, called beam-induced RF heating. The LHC performance limitations linked to impedances encountered during the 2010-2012 run are reviewed and the currently expected situation during the HL-LHC era is discussed.

show abstract

The HL-LHC Accelerator Physics Challenges

Abstract: We review the conceptual baseline of the HL-LHC project, putting into perspective the main beam physics challenges of this new collider in comparison with the existing LHC, and the series of solutions and possible mitigation measures presently envisaged.

Cited by 2 publications

References 20 publications

Heavy-Ion Operation of HL-LHC

Heavy-Ion Operation of HL-LHC

Impedance and Component Heating

Contact Info

Product

Resources

About