We review linear e+e− colliders with a special focus on high centre-of-mass energies and beam polarisation, take a fresh look at the various accelerator technologies available or under development and, for the first time, discuss how a facility first equipped with a technology mature today could be upgraded with technologies of tomorrow to reach much higher energies and/or luminosities. In...
The Future Circular electron-positron Collider (FCC-ee), the first phase of the broader FCC program, is a proposed next-generation lepton collider at CERN. Designed to operate in a 91 km circular tunnel, FCC-ee will run at four distinct center-of-mass energies, delivering collisions at four experimental interaction points to enable unprecedented precision measurements of the Standard Model and...
Muons offer a unique opportunity to build a compact high-energy electroweak collider at the 10 TeV scale. It will be a paradigm-shifting tool for particle physics representing the first collider to combine the high-energy reach of a proton collider and the high precision of an electron-positron collider. The International Muon Collider Collaboration (IMCC) has made significant progress in...
The Future Circular Collider electron-positron (FCC-ee) is being designed to enable high energy physics experiments from the Z-pole up to above the top-pair-threshold, corresponding to center-of-mass energies from 91.2 to 365 GeV. This demands a precise knowledge of the center-of-mass energy and collision boosts at all interaction points. Center-of-mass energy measurements are envisaged being...
Xsuite is a recent Python framework for accelerator physics simulations developed at CERN. Since its inception in 2021, it has progressively supplanted legacy simulation tools such as SixTrack, sixtracklib, PyHEADTAIL, and COMBI. It consists of distinct, interconnected Python modules—Xobjects, Xdeps, Xtrack, Xpart, Xfields, Xcoll, and Xwakes—and seamlessly interfaces with other...
The Large Hadron electron Collider (LHeC) is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC hadron or nuclear beams and a 50 GeV electron beam from an Energy Recovery Linac (ERL) in racetrack configuration. A first phase with concurrent operation of electron-hadron and hadron-hadron collisions at the HL-LHC, followed by a second phase of standalone...
Positron Sources for high luminosity high-energy colliders with at least a cms of 500 GeV are a challenge for all future lepton colliders as, for instance, the International Linear Collider (ILC), the Compact Linear Collider (CLIC) as well as new concepts as the HALHF collider design. In the talk new R&D developments for the undulator-based positron source are discussed. The talk includes...
The e$^{+}$BOOST (intense positron source Based On Oriented crySTals) project aims to demonstrate the effectiveness of a novel fixed-target positron source scheme enhanced by coherent phenomena in crystals. Future lepton colliders such as FCC-ee, CLIC, and CepC require unprecedented positron beam intensities to achieve their respective luminosity goals.
Conventional positron...
Collider rings all around the world need to have several sensors all around the ring to operate. One kind of these sensors is the Beam Position Monitors (BPMs), that allows operators to measure if the beam travelling in their apparatus is well centered in the different magnets.
One specific category of BPMs, standing out by its very high aquisition rate, is called the Turn-by-turn BPMs...
The Mu2e experiment is designed to investigate the CLFV through the observation of a neutrinoless muon-to-electron conversion in the field of an Al nucleus. The observation of such a process would be clear evidence of physics beyond the standard model. Due to the rarity of this process, a cutting-edge, intense muon beam is required to achieve an improvement of the current single-event...
TWOCRYST is a proof-of-concept installation in the Large Hadron Collider (LHC) at CERN to assess the feasibility of double-crystal experiments. It is designed to provide critical input to a possible future experiment aiming to measure the dipole moments of short-lived charm baryons. A first bent crystal extracts particles from the LHC beam halo onto a target, at safe distances from the...
New directions in science are launched by new tools more often than by new concepts.
At the present time characterised by incremental increase of the energy and intensity of particle beams, Gamma Factory (GF) proposes leaps in the intensity (up to 7 orders of magnitude), quality (low emittance, polarisation CP-tagging, flavour tagging), and precision control of several types of particle...
The Advanced Wakefield Experiment, AWAKE, at CERN is an accelerator R&D experiment, which moved from a proof-of-concept experiment to a facility that develops the proton-driven plasma wakefield acceleration technology to be ready for proposing first particle physics applications in the 2030’s. The AWAKE program aims to accelerate electrons to energies of 10 to 100 GeV in a single plasma...
The ``Laser-hybrid Accelerator for Radiobiological Applications'', LhARA, is conceived as a novel, uniquely-flexible facility dedicated to the study of the biological impact of proton and ion beams. The collaboration is implementing a proof-of-principal beam-line, "PoPLaR", on the SCAPA facility at Strathclyde University. It is planned that the beam line will be commissioned over the summer...
