Description
Conveners:
Tatiana Pieloni (École Polytechnique Fédérale de Lausanne)
Mauro Migliorati (Universita di Roma)
Marc Wenskat (Universität Hamburg)
Contact: eps23-conveners-t13 @desy.de
The High-Luminosity LHC project aims to increase the integrated luminosity of the LHC by an order of magnitude and enable its operation until the early 2040s. This presentation will provide an overview of the current status of the HL-LHC project. By mid-2023, several achievements related to the HL-LHC can be reported, starting from the completion of the civil engineering to the successful...
The uncertainties affecting the integrated absolute luminosity recorded by the experimental detectors in pp collisions during LHC Run 2 lie in the 1-2% range. They typically fall into three categories: van-der-Meer (vdM) calibration biases, instrumental non-linearities that affect the transfer of the vdM calibration to the high-luminosity physics regime, and long-term stability of the...
The beam–beam interaction between the two circulating beams has been studied since the era of particle colliders started. This electromagnetic interaction occurs during collisions and can result in a significant bias on the measured luminosity. Numerical models have been developed to study the beam-beam induced bias on the Large Hadron Collider (LHC) luminosity measurements during van der Meer...
Different scenarios for fixed-target physics research are being considered at the Large Hadron Collider (LHC) as part of the Physics Beyond Collider (PBC) study at CERN. In the so-called double crystal setup, a first bent crystal channels a fraction of the LHC multi-turn halo and steers it onto an in-vacuum target. This is followed by a second crystal with a bending angle of several mrad. This...
A circular muon collider, due to strong suppression of synchrotron radiation (muons are about 207 times heavier than electrons), can provide high energy (multi-TeV) collisions using fundamental (point-like) particles improving that way the energy frontiers of lepton-antilepton machines. A unique feature of muon colliders, is the significant increase of the luminosity per beam power with beam...
Multi-TeV muon collisions are one of the most promising means to perform Standard Model high precision physics measurements and to search for new physics. The design of the interaction region and therefore of the Machine-Detector Interface, depends on the center of mass energy, therefore dedicated studies and optimizations are needed. In order to achieve the desired luminosity, high beam...
The costs of operating big science facilities, for example accelerators, are very large, and depend critically on the price of primarily electricity, but also of water and other utilities. This means that facilities must be energy and resource efficient. Facilities should at the same time also be environmentally sustainable. Finally, in these times with very high energy prices, all efforts...
Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. Use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. Protons of energy 400 GeV drove wakefields that accelerated electrons to 2 GeV in under 10 m of plasma. The AWAKE collaboration is now embarking on Run 2 with the main...
LhARA, the ‘Laser-hybrid Accelerator for Radiobiological Applications’, will be a novel, uniquely flexible, facility dedicated to the study of radiobiology. LhARA will use a high-power pulsed laser to generate a short burst of protons or light ions. These will be captured using strong-focusing electron-plasma (Gabor) lenses. Acceleration using a fixed-field alternating-gradient accelerator...
The construction of an electron-positron collider "Higgs factory" has been stalled for a decade,not because of feasibility but because of the cost of conventional radio-frequency (RF) acceleration.
Plasma-wakefield acceleration promises to alleviate this problem via significant cost reduction based on its orders-of-magnitude higher accelerating gradients. However, plasma-based acceleration...
Beam-driven plasma-wakefield acceleration (PWFA) is a promising technology for future accelerator facilities, where a high electric field gradient could shrink the size, reduce the cost or/and provide highest beam energies. Successful experimental results in recent decades have demonstrated the feasibility of high-gradient acceleration in plasma. However, to meet the demands of current...
A key ambition expressed in the European Strategy for Particle Physics has been that “the energy efficiency of present and future accelerators […] is and should remain an area requiring constant attention”. Accordingly, “a detailed plan for the [ …] saving and re-use of energy should be part of the approval process for any major project”. The Energy Recovery Linac (ERL) developments directly...
In this presentation I plan to discuss potential offered by Energy-Recovery Linacs (ERLs) and particle recycling for boosting luminosity in high-energy electron-positions and lepton-hadron colliders. I will start from presenting several proposed ERL-based colliders and compare them with more traditional, but better developed concept of FCCee, ILC and CLIC. ERL-based colliders have promise not...
The Berlin Energy Recovery LINAC Project (bERLinPro), a 100-mA, 50-MeV ERL design was originally conceived to demonstrate ERL technology for use in a future high-brilliance light source at HZB. This endeavor was officially ended in 2020. However, the full infrastructure for ERL operation, including cryogenics and high-power RF, the UHV vacuum system and complete beam transport is installed,...
SuperKEKB is a double-ring collider consisting of a 7-GeV electron ring (HER) and a 4-GeV positron ring (LER) with a circumference of approximately 3 km, constructed by reusing the KEKB tunnel. To further increase the peak luminosity, “Nano-beam scheme with large crossing angle” is adopted. Electrons and positrons collide at a larger horizontal crossing angle while maintaining the bunch length...
The Circular Electron Positron Collider (CEPC) was proposed by Chinese scientists in Sept. 2012, shortly after the discovery of the Higgs boson at LHC in July 2012. CEPC would enable the precision study of the Higgs boson and facilitate the search for new physics beyond the standard model. The accelerator design and the technology R&D of CEPC has been evolving since the launch of the project...
The Future Circular Collider electron-positron (FCC-ee) is a proposed high-energy lepton collider that aims to reach unprecedented precision in the measurements of fundamental particles. However, several beam related processes produce particles in the Machine-Detector Interface (MDI) region, which can adversely affect the measurements' accuracy. This contribution presents a study of the...
The goal of a next-generation e+e- collider is to carry out precision measurements to percent level of the Higgs boson properties that are not accessible at the LHC and HL-LHC. In this talk we will present the study of a new concept for a high gradient, high power accelerator with beam characteristics suitable to study the Higgs boson, the Cool Copper Collider (C3), with the goal of...
The International Linear Collider (ILC) and Compact Linear Collider (CLIC) are well-developed with mature designs as a next-generation high-energy electron-positron collider, for exploring the Higgs-boson, top-quark and beyond-Standard Model sectors. An overview and status of each collider project will be given, including the design, key technologies, accelerator systems, energy-staging...
In 2023, ILC entered into a new stage. A new budget to facilitate the developments of accelerator technology especially focusing on three topics, SRF, nano beam and particle sources, which are important for the ILC, was approved. To maximize the output of these activities, the International technology network has formed. In this presentation, the latest status of the project on accelerator...
The CLIC study has developed compact, high gradient and energy efficient acceleration units as building blocs for a high energy linear collider for high-energy physics. Many of these components are now available in industry. These properties promise cost effective solutions for small linear accelerators in a variety of applications. The CLIC study actively promoted and supported such spin-off...
Positron sources are challenging for all high-energy lepton colliders due to the high luminosity, stability and polarization requirements imposed by phyiscs. In this talk an overview will be given on the different concepts of positron sources. The focus will be set on the currently most mature designs as, for instance, the undulator-based positron source, foreseen for the ILC baseline design,...
To ensure high luminosity for high energy physics experiments at the International Linear Collider (ILC), a source of sufficient amounts of positrons is required. One approach for this is to produce positrons by generating electron-positron pairs from high energy photons impinging on a high-Z target material and capturing these particles with a magnetic focusing device. This beam-optics...
