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View article: CLIC readiness report
CLIC readiness report Open
The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear e + e − collider studied by the international CLIC and CLICdp collaborations hosted by CERN. CLIC uses a two-beam acceleration scheme, in which normal-conducting high…
View article: Transverse Collective Effects studies for a Muon Collider
Transverse Collective Effects studies for a Muon Collider Open
The International Muon Collider Collaboration (IMCC) is investigating the key challenges of a 10 TeV centre-of-mass muon collider ring, along with its injector complex and an intermediate 3 TeV collider stage. Muon and anti-muon bunches ar…
View article: Machine Detector Interface and Beam-Induced Background Studies for a 10 TeV Muon Collider
Machine Detector Interface and Beam-Induced Background Studies for a 10 TeV Muon Collider Open
Muon colliders present a unique opportunity to achieve unprecedented center-of-mass energies in lepton collisions. Unlike electrons, muons are not significantly affected by synchrotron radiation, allowing them to be accelerated and collide…
View article: Multiturn simulation of radiative Bhabha scattering in the equivalent photon approximation
Multiturn simulation of radiative Bhabha scattering in the equivalent photon approximation Open
In this paper, we present a Monte Carlo event generator for radiative Bhabha scattering, based on the method of equivalent photons, and optimized for multiturn tracking simulations in the framework. We demonstrate the accuracy of the event…
View article: Advanced accelerator concepts for dark sector searches and fast muon acceleration
Advanced accelerator concepts for dark sector searches and fast muon acceleration Open
Dielectric laser acceleration (DLA) is a promising approach to accelerate single electrons at a high repetition rate to GeV energies, for indirect dark matter searches. Relevant concepts include the integration of the dielectric structure …
View article: Transverse Coherent Instability Studies for the High-Energy Part of the Muon Collider Complex
Transverse Coherent Instability Studies for the High-Energy Part of the Muon Collider Complex Open
The International Muon Collider Collaboration (IMCC) is studying a 3 TeV center-of-mass muon collider ring, as well as a possible next stage at 10 TeV. Muons being 200 times heavier than electrons, limitations from synchrotron radiation ar…
View article: Intensity Effects in a Chain of Muon RCSs
Intensity Effects in a Chain of Muon RCSs Open
The muon collider offers an attractive path to a compact, multi-TeV lepton collider. However, the short muon lifetime leads to stringent requirements on the fast energy increase. While extreme energy gains in the order of several GeV per t…
View article: The muon collider progress
The muon collider progress Open
Recently the muon collider has been recognised as an important option to be considered for the future of particle physics.\nIt is part of the European Accelerator R&D; Roadmap developed in 2021 and approved by Council. Also interest is ris…
View article: Status and challenges of the Future Circular Hadron Collider FCC-hh
Status and challenges of the Future Circular Hadron Collider FCC-hh Open
The Future Circular Collider (FCC) study was launched as a worldwide international collaboration hosted by CERN with the ultimate goal of pushing the energy frontier far beyond the LHC. FCC covers two accelerators, namely an energy-frontie…
View article: Responsiveness to Evidence: A Political Cognition Approach 1
Responsiveness to Evidence: A Political Cognition Approach 1 Open
Questions of societal import have both normative (what should be done) and descriptive (what is the case) dimensions. In this chapter, we address disagreements about the latter through the lens of political cognition, a research effort spa…
View article: Bright muon beams and muon colliders
Bright muon beams and muon colliders Open
Muon collider (MC) technology must overcome several significant challenges to reach the maturity of electron-positron colliders. An increased level of R&D effort is justified at the current time, because the muon collider promises an alter…
View article: Future Circular Hadron Collider FCC-hh: Overview and Status
Future Circular Hadron Collider FCC-hh: Overview and Status Open
The Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. Its goal is to push the field to the next energy frontier beyond LHC, increasing by an order of magnitude the mass of particl…
View article: Simulated Detector Performance at the Muon Collider
Simulated Detector Performance at the Muon Collider Open
In this paper we report on the current status of studies on the expected performance for a detector designed to operate in a muon collider environment. Beam-induced backgrounds (BIB) represent the main challenge in the design of the detect…
View article: Promising Technologies and R&D Directions for the Future Muon Collider Detectors
Promising Technologies and R&D Directions for the Future Muon Collider Detectors Open
Among the post-LHC generation of particle accelerators, the muon collider represents a unique machine with capability to provide very high energy leptonic collisions and to open the path to a vast and mostly unexplored physics programme. H…
View article: The physics case of a 3 TeV muon collider stage
The physics case of a 3 TeV muon collider stage Open
In the path towards a muon collider with center of mass energy of 10 TeV or more, a stage at 3 TeV emerges as an appealing option. Reviewing the physics potential of such muon collider is the main purpose of this document. In order to outl…
View article: Muon Collider Physics Summary
Muon Collider Physics Summary Open
The perspective of designing muon colliders with high energy and luminosity, which is being investigated by the International Muon Collider Collaboration, has triggered a growing interest in their physics reach. We present a concise summar…
View article: The Effectiveness of US Foreign Policies in Diminishing the Diplomatic Power of the PRC (1993-2020)
The Effectiveness of US Foreign Policies in Diminishing the Diplomatic Power of the PRC (1993-2020) Open
Following the market liberalization of the People’s Republic of China (PRC), the United States has sought to diminish the PRC’s ability to influence the US-backed international order. This paper examines the foreign policy strategies emplo…
View article: Prospects on Muon Colliders
Prospects on Muon Colliders Open
In the framework of the European Strategy Update on Particle Physics, the working group appointed to review the Muon Colliders has become the de facto seed of an on-going international effort. A muon collider, if demonstrated to be feasibl…
View article: Mitigation of coherent beam instabilities in linear colliders and FCC-hh
Mitigation of coherent beam instabilities in linear colliders and FCC-hh Open
Collective instabilities play an important role in projects as diverse as FCC-hh and CLIC and drive some of the choices. In the paper a few examples are shown where the instabilities were mitigated by design choices and the resulting impac…
View article: Low-impedance beam screen design for future hadron colliders
Low-impedance beam screen design for future hadron colliders Open
In future hadron colliders with collision energies greater than the energy of the Large Hadron Collider (LHC), the beamscreen becomes an increasingly important source of beam coupling impedance. This may lead to coherent beam instabilities…
View article: CLIC-DR electron cloud build up simulations
CLIC-DR electron cloud build up simulations Open
This study investigates impact of beam pipe material and external magnetic field on electron cloud build up mechanism. The machine parameters are in the scope of CLIC damping rings. Two dierent filling schemes for 0.5 and 1 ns bunch spacin…
View article: Stability limits with Landau damping in the FCC-hh
Stability limits with Landau damping in the FCC-hh Open
The resistive wall impedance is one of the expected main drivers of transverse beam instabilities in the proposed Future Circular Collider hadron-hadron option (FCC-hh). We obtain the resistive wall impedance for the FCC-hh beam screen fro…
View article: Measurements and modeling of stray magnetic fields and the simulation of their impact on the Compact Linear Collider at 380 GeV
Measurements and modeling of stray magnetic fields and the simulation of their impact on the Compact Linear Collider at 380 GeV Open
The Compact Linear Collider (CLIC) targets a nanometre beam size at the collision point. Realising this beam size requires the generation and transport of ultra-low emittance beams. Dynamic imperfections can deflect the colliding beams, le…
View article: The International Muon Collider Collaboration
The International Muon Collider Collaboration Open
A muon collider offers a unique opportunity for high-energy, high-luminosity lepton collisions and could push the frontiers of particle physics by providing excellent discovery reach with excellent precision. A scheme has been developed by…
View article: Magnetic characterization of Mumetal® for passive shielding of stray fields down to the nano-Tesla level
Magnetic characterization of Mumetal® for passive shielding of stray fields down to the nano-Tesla level Open
The luminosity of a particle collider is an extremely crucial performance parameter describing its capability of producing interactions in the collision point. However, imperfections in a collider can lead to luminosity loss. Among differe…
View article: $\gamma\gamma$ Beam-beam Parameter Study for a 3 TeV PWFA Linear Collider
$\gamma\gamma$ Beam-beam Parameter Study for a 3 TeV PWFA Linear Collider Open
Our beam-beam parameter study using beam-beam simulations and PWFA (particle-driven plasma acceleration) beam parameters indicates that at 3 TeV, for examined electron beam lengths ${2~\mu\mathrm{m}\leq\sigma_z\leq 10~\mu\mathrm{m}}$, the …
View article: $γγ$ Beam-beam Parameter Study for a 3 TeV PWFA Linear Collider
$γγ$ Beam-beam Parameter Study for a 3 TeV PWFA Linear Collider Open
Our beam-beam parameter study using beam-beam simulations and PWFA (particle-driven plasma acceleration) beam parameters indicates that at 3 TeV, for examined electron beam lengths ${2~μ\mathrm{m}\leqσ_z\leq 10~μ\mathrm{m}}$, the total lum…
View article: $\mathrm{e}^+$$\mathrm{e}^-$ Beam-beam Parameter Study for a TeV-scale PWFA Linear Collider
$\mathrm{e}^+$$\mathrm{e}^-$ Beam-beam Parameter Study for a TeV-scale PWFA Linear Collider Open
We perform a beam-beam parameter study for a TeV-scale PWFA (particle-driven plasma wakefield acceleration) $\mathrm{e}^+$$\mathrm{e}^-$ linear collider using GUINEA-PIG simulations. The study shows that the total luminosity follows the $1…
View article: A primary electron beam facility at CERN -- eSPS Conceptual design report
A primary electron beam facility at CERN -- eSPS Conceptual design report Open
The design of a primary electron beam facility at CERN is described. The study has been carried out within the framework of the wider Physics Beyond Colliders study. It re-enables the Super Proton Synchrotron (SPS) as an electron accelerat…
View article: Conceptual Design Report -- eSPS
Conceptual Design Report -- eSPS Open
The design of a primary electron beam facility at CERN is described. It re-enables the SPS as an electron accelerator, and leverages the development invested in CLIC technology for its injector and as accelerator R&D infrastructure. The fa…