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Öğe A Large Hadron Electron Collider at CERN(IOP PUBLISHING LTD, 2012) Fernandez, J. L. Abelleira; Adolphsen, C.; Akay, A. N.; Aksakal, H.; Albacete, J. L.; Alekhin, S.; Barber, D.[Abstract Not Available]Öğe Bright Angstrom and picometer free electron laser based on the Large Hadron electron Collider energy recovery linac(Amer Physical Soc, 2021) Nergiz, Z.; Mirian, N. S.; Aksoy, A.; Zhou, D.; Zimmermann, F.; Aksakal, H.The Large Hadron electron Collider (LHeC) is a proposed future particle-physics project colliding 60 GeV electrons from a six-pass recirculating energy-recovery linac (ERL) with 7 TeV protons stored in the LHC. The ERL technology allows for much higher beam current and, therefore, higher luminosity than a traditional linac. The high-current, high-energy electron beam can also be used to drive a free electron laser (FEL). In this study, we investigate the performance of an LHeC-based FEL, operated in the self-amplified spontaneous emission mode using electron beams after one or two turns, with beam energies of, e.g., 10, 20, 30 and 40 GeV, and aim at producing x-ray pulses at wavelengths ranging from 8 to 0.5 angstrom. In addition, we explore a possible path to use the 40 GeV electron beam for generating photon pulses at much lower wavelengths, down to a few picometer. We demonstrate that such ERL-based high-energy FEL would have the potential to provide orders of magnitude higher average brilliance at angstrom wavelengths than any other FEL either existing or proposed. It might also allow a pioneering step into the picometer wavelength regime.Öğe Conversion efficiency and luminosity for gamma-proton colliders based on the LHC-CLIC or LHC-ILC QCD explorer scheme(ELSEVIER SCIENCE BV, 2007) Aksakal, H.; Ciftci, A. K.; Nergiz, Z.; Schulte, D.; Zimmermann, F.Gamma-proton collisions allow unprecedented investigations of the low x and high Q(2) regions in quantum chromodynamics. In this paper, we investigate the luminosity for "ILC" x LHC(root s(ep) = 1.3 TeV) and "CLIC" x LHC(root s(ep) = 1.45 TeV) based gamma p colliders. Also we determine the laser properties required for high conversion efficiency. (C) 2007 Elsevier B.V. All rights reserved.Öğe Laser collimation for linear colliders(IEEE, 2007) Aksakal, H.; Resta-Lopez, J.; Zimmermann, F.We explore the possibility of laser-based postlinac beam collimation in future linear colliders. A laser employed as a spoiler can neither be 'destroyed' by the beam impact nor generate collimator wakefields. In addition, the postlinac collimation section, presently the longest part of linear-collider beam delivery systems, can be shortened. In this paper we investigate different types of laser modes for use as spoiler. Suitable laser beam parameters and modes are discussed for collimation in both CLIC and ILC.Öğe Luminosity upgrade of CLIC-LHC ep/gamma p collioder(IEEE, 2007) Aksakal, H.; Ciftci, A. K.; Nergiz, Z.; Schulte, D.; Zimmermann, F.An energy frontier or QCD Explorer ep and gamma p collider can be realized by colliding high-energy photons generated by Compton backscattered off a CLIC electron beam, at either 75 GeV or 1.5 TeV, with protons or ions stored in the LHC. In this study we discuss a performance optimization of this type of collider by tailoring the parameters of both CLIC and LHC. An estimate of the ultimately achievable luminosity is given.Öğe The Large Hadron-Electron Collider at the HL-LHC(Iop Publishing Ltd, 2021) Agostini, P.; Aksakal, H.; Alekhin, S.; Allport, P. P.; Andari, N.; Andre, K. D. J.; Angal-Kalinin, D.The Large Hadron-Electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting energy-recovery technology, it collides a novel, intense electron beam with a proton or ion beam from the High-Luminosity Large Hadron Collider (HL-LHC). The accelerator and interaction region are designed for concurrent electron-proton and proton-proton operations. This report represents an update to the LHeC's conceptual design report (CDR), published in 2012. It comprises new results on the parton structure of the proton and heavier nuclei, QCD dynamics, and electroweak and top-quark physics. It is shown how the LHeC will open a new chapter of nuclear particle physics by extending the accessible kinematic range of lepton-nucleus scattering by several orders of magnitude. Due to its enhanced luminosity and large energy and the cleanliness of the final hadronic states, the LHeC has a strong Higgs physics programme and its own discovery potential for new physics. Building on the 2012 CDR, this report contains a detailed updated design for the energy-recovery electron linac (ERL), including a new lattice, magnet and superconducting radio-frequency technology, and further components. Challenges of energy recovery are described, and the lower-energy, high-current, three-turn ERL facility, PERLE at Orsay, is presented, which uses the LHeC characteristics serving as a development facility for the design and operation of the LHeC. An updated detector design is presented corresponding to the acceptance, resolution, and calibration goals that arise from the Higgs and parton-density-function physics programmes. This paper also presents novel results for the Future Circular Collider in electron-hadron (FCC-eh) mode, which utilises the same ERL technology to further extend the reach of DIS to even higher centre-of-mass energies.
