Conveners
Accelerators: Physics, Performance, and R&D for future facilities: Accelerators: Physics, Performance, and R&D for future facilities
- Gaku Mitsuka (KEK)
Accelerators: Physics, Performance, and R&D for future facilities: Accelerators: Physics, Performance, and R&D for future facilities
- Gaku Mitsuka (KEK)
Accelerators: Physics, Performance, and R&D for future facilities: Accelerators: Physics, Performance, and R&D for future facilities
- Nicolas Mounet (CERN)
Accelerators: Physics, Performance, and R&D for future facilities: Accelerators: Physics, Performance, and R&D for future facilities
- Jiri Kral (CERN)
Accelerators: Physics, Performance, and R&D for future facilities: Accelerators: Physics, Performance, and R&D for future facilities
- Diktys Stratakis
Accelerators: Physics, Performance, and R&D for future facilities: Accelerators: Physics, Performance, and R&D for future facilities
- Diktys Stratakis
The discovery of the Higgs boson marked the beginning of a new era in HEP. Precision measurement of the Higgs properties become a natural next step beyond the LHC and HL-LHC. Among the proposed Higgs factories worldwide, the Circular Electron Positron Collider (CEPC) was proposed in 2012. CEPC can produce Higgs/W/Z and top which aims to measure Higgs, EW, flavor physics and QCD with...
The International Linear Collider (ILC) and Compact Linear Collider (CLIC) are well-developed with mature and resource-conscious designs as next-generation high-energy electron-positron colliders. With their key features of polarised beams and extendable energy reach they offer unique possibilities to explore the Higgs boson, the electroweak gauge bosons, the top quark as well as beyond...
The SuperKEKB is a high-luminosity electron-positron collider where a โnanobeam collision schemeโ is utilized to achieve an unprecedented high luminosity. Its luminosity performance had gradually improved, achieving a peak luminosity of 4.7e34 cm-2s-1 in June 2022. While making steady progress, it was found that the SuperKEKB encountered some challenges as a luminosity frontier machine such as...
In response to the directives of the 2020 European Strategy for Particle Physics (ESPP), CERN, in collaboration with international partners, is exploring the feasibility of an energy-frontier, 100 TeV hadron collider, including, as an initial stage, a high-luminosity circular electron-positron collider serving as Higgs and electroweak factory.
This effort builds upon the 2019 conceptual...
With concerted R&D efforts under way, the Energy Recovery Linac (ERL) technique is an outstanding novel means to considerably improve the performance of particle physics colliders, providing excellent physics opportunities with significantly reduced power as is required for a next generation of sustainable machines. The European R&D Roadmap for ERL, endorsed by CERN Council, identifies the...
The development of Energy Recovery Linacs (ERL) has been recognized as one of the five main pillars of accelerator R&D in support of the European Strategy for Particle Physics. Two projects for high power ERLs, PERLE and bERLinPro are considered key infrastructures for the development of ERLs for future HEP colliders, like e.g. LHeC or FCC-eh. Whereas bERLinPro will be demonstrating high...
The proposed STCF is a symmetric electron-positron beam collider designed to provide e+eโ interactions at a centerof-mass energy from 2.0 to 7.0 GeV. The peaking luminosity is expected to be 0.5ร10^35 cmโ2sโ1. STCF is expected to deliver more than 1 abโ1 of integrated luminosity per year. The huge samples could be used to make precision measurements of the properties of XYZ particles; search...
Super Tau-Charm Facility (STCF) was proposed as a third-generation circular electron-positron collider of 2-7 GeV (CoM) and 5*10^34 cm^-2s^-1 (luminosity), aiming to explore charm-tau physics in the next decades. This presentation will introduce the accelerator design and R&D efforts for STCF. Under the financial support of the local provincial and national funding agencies, the STCF...
The machine-detector interface (MDI) issues are one of the most complicate and challenging topics at the Circular Electron Positron Collider (CEPC). Comprehensive understandings of the MDI issues are decisive for achieving the optimal overall performance of the accelerator and detector. The machine will operate at different beam energies, therefore, a flexible interaction region design will be...
The HALHF concept utilises beam-driven plasma-wakefield acceleration to accelerate electrons to very high energy and collide them with much lower-energy positrons accelerated in a conventional RF linac. This idea, which avoids difficulties in the plasma acceleration of positrons, has been used to design a Higgs factory that is much smaller, cheaper and greener than any other so far conceived....
The CERN Future Circular electron-positron Collider (FCC-ee) will enable extreme precision physics experiments from the Z-pole up to above the top-pair production threshold. Very precise beam energy measurements will be performed by resonant depolarization (RD) of e+ and e- pilot bunches, using novel 3D-polarimeters. Additional measurements will be needed to reduce the center-of-mass energy...
Positron source yield is crucial for achieving the required luminosity in future lepton colliders. The conventional approach involves an e-beam impinging a high-density solid target to initiate an electromagnetic shower and capture positrons afterwards. But, this scheme is limited by the Peak Energy Deposited Density(PEDD) on the target before its structural failure.
We can utilize the large...
Positron Sources for high luminosity high-energy colliders are a challenge for all future lepton colliders as, for instance, the International Linear Collider (ILC) 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 current prototypes for optic matching devices as pulsed solenoid as...
The High-Luminosity LHC project aims to increase the integrated luminosity by an order of magnitude and enable its operation until the early 2040s. This presentation will give an overview of the current status of the project, for which several achievements can be reported, from the completion of the civil engineering to the successful demonstration of new key technologies such as the Nb3Sn...
In the High Luminosity Large Hadron Collider (HL-LHC) and most future colliders crab crossing is required to recuperate the significant geometric luminosity loss due to finite crossing angle at the collision point. In the framework of the HL-LHC, a decade long R&D program on ultra-compact superconducting crab cavities led to the successful demonstration of crabbing with high energy proton...
The build-up of electron clouds in accelerator beam chambers can lead to detrimental effects, such as transverse instabilities, emittance growth, beam loss, vacuum degradation, and heat load. Such effects are systematically observed in the Large Hadron Collider (LHC) during operation with proton beams, limiting the total intensity achievable in the collider. The High Luminosity LHC (HL-LHC)...
The HL-LHC performance relies on handling safely and reliably high intensity beams of unprecedented stored energy. The 7TeV design target is compatible a factor 2 larger current than the LHC and levelled peak luminosities 5 times, and ultimately 7.5 times, larger. This goal requires a massive collimation system upgrade, both for the halo betatron collimation that must sustain beam losses up to...
The ongoing feasibility study of the Future Circular Collider (FCC) comprises two distinct accelerators: a high-luminosity circular electron-positron collider known as FCC-ee and an energy-frontier hadron collider named FCC-hh. These two facilities are designed to take advantage of a common tunnel infrastructure. We present the new baseline design of FCC-hh, underlining the most recent...
Magnet technology is a key enabler for the Future Circular Collider (FCC) and its hadron collider variant (FCC-hh). The European High-Field Magnet Program (HFM), hosted at CERN, implements a European research network for high-field accelerator magnets that is geared towards FCC-hh. The research network includes four national laboratories and CERN for magnet design and construction, as well as...
Realization of high intensity neutrino beam over 1 MW beam power is crucial to search for CP violation in Lepton sector. J-PARC accelerator and neutrino beamline are being upgraded towards 1.3 MW beam power for Hyper-Kamiokande experiment. Magnetic horns are used to focus secondary particles produced in a neutrino production target and can intensify the neutrino beam by more than an order of...
A plethora of ideas for exploiting the full scientific potential at the fixed-target complex has been brought forward within the Physics Beyond Colliders Initiative (PBC) at CERN seeking to exploit the full intensity the Super Proton Synchrotron (SPS) can provide. Out of the findings of a PBC Task Force, a new project has been mandated to prepare the technical design for a new high-intensity...
The Physics Beyond Colliders (PBC) study at CERN explores, among other topics, the potential of extending the Large Hadron Collider (LHC) physics program by Fixed-Target (FT) experiments. One option is to use two bent crystals (double-crystal setup): the first crystal deflects particles from the beam halo onto an in-vacuum target. Another crystal deflects short-lived particles created in the...
We review the current plans for the EIC Electron Injector chain. These include and overview of the accelerator chain necessary to deliver 5, 10 and 18 GeV polarized electrons to the Electron Storage Ring (ESR), the charge accumulation and polarized electron transport approach.
Leveraging the novel concept of ERLs, we present the LHeC and FCC-eh that allow the exploration of electron-hadron interactions above TeV scale. The presented design of the electron accelerator is based on two superconducting linear accelerators in a racetrack configuration that can produce lepton beam energies in excess of 50 GeV. In energy recovery mode, the accelerator is capable of...
Multipacting in particle accelerator elements is a major challenge. Multipacting is strongly dependent on the surface total electron yield (TEEY). Developing thin coatings to reduce it is of critical importance. The surface dissipation induced by RF fields is also a critical parameter and the thin film electrical conductivity has to be tuned accordingly. For each application, an optimal set of...
Ultra-short and intense electron beams are now routinely generated by the Laser Wakefield acceleration (LWFA) mechanism. However, achieved beams remain unstable compared to conventional beams, even at state-of-the-art laser facilities, because of the inherent nature of the laser systems and the gaseous target involved. An online, accurate and non-perturbative beam diagnostic system is required...
The CLIC study has developed compact, high gradient, and energy efficient acceleration units as building blocks for a future high-energy, electron-based linear collider. The components to construct such units are now generally available in industry and their properties promise cost effective solutions for making electron-based linacs (already a crucial technology in many research, medical, and...
Current artificial muon beam sources require conventional radiofrequency (RF) accelerators that can be 100s-1000s of meters in size. Laser wakefield acceleration, instead, can achieve acceleration gradients up to 100 GeV/m, 1000 times greater than RF accelerators. Therefore, by using a meter-scale long plasma and combining it with next-generation laser driver technology the system could be...
The Mu2e experiment at Fermilab investigates rare muon-to-electron conversion using a muon beam generated by an 8 GeV proton beam. To achieve the required high muon flux, minimizing extraction losses is crucial. An important source of such losses are the particles impacting on the electric septum anode. An ideal solution to the problem lies in the beam shadowing scheme tested at CERN SPS. In...
Meson factories are powerful drivers of diverse physics programs and play a major role in particle physics at the intensity frontiers.
Currently, PSI delivers the most intense continuous muon beam in the world up to 10^8 ฮผ+/s. The High-Intensity Muon Beam (HiMB) project at PSI aims to develop new muon beamlines that deliver up to 10^10 ฮผ+/s, with a huge impact for low energy muon-based...
The nuSTORM facility enables innovative neutrino physics studies through the decay of muons circulating in a storage ring. The well-defined composition and energy spectra of the neutrino beam from the decays of muons,combined with precise muon flux measurements, facilitate a diverse research program probing fundamental neutrino properties.
nuSTORM has been optimized to store muons with...
Circular muon colliders provide the prospect of colliding particles at unprecedented center-of-mass energies. However, the stored muons decay along their trajectory, inducing several technological challenges for the collider and detector design. In particular, secondary decay $e^{+/-}$ are a source of background and induce radiation damage in the machine and detector components, requiring a...
The international muon collider collaboration is working toward a staged implementation of a 10 TeV muon collider. The talk will summarise the key challenges and the progress that the collaboration is making in addressing them.
A 10 TeV muon collider has the potential to directly search for new physics and uniquely probe electroweak SM properties. An important component of such a collider is cooling, in which a cloud of muons is converted into a beam. In the last stage of this process called final cooling, emittance decreases in the transverse axes while increasing in the longitudinal axis. This step is critical to...
The International Muon Collider Collaboration (IMCC) is investigating the key challenges of a 10 TeV center-of-mass muon collider ring, along with its injector complex and an intermediate 3 TeV collider stage. Muon and anti-muon bunches are produced via a proton driver complex and then undergo 6D cooling. The bunches are then accelerated before entering the collider ring by a series of Linacs,...
A TeV muon-ion collider could be established if a high energy muon beam that is appropriately cooled and accelerated to the TeV scale is brought into collision with a high energy hadron beam at facilities such as Brookhaven National Lab, Fermilab, or CERN. Such a collider opens up a new regime for deep inelastic scattering studies as well as facilitates precision QCD and electroweak...
