Yazar "Zimmermann, F." seçeneğine göre listele
Listeleniyor 1 - 6 / 6
Sayfa Başına Sonuç
Sıralama seçenekleri
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 Interaction-region design options for a linac-ring LHeC(2010) Zimmermann, F.; Tomas, R.; Bettoni, S.; Brüning, O.; Holzer, B.; Russenschuck, S.; Schulte, D.The interaction-region design for a linac-ring electron-proton collider based on the LHC ("LR-LHeC") [1, 2] poses numerous challenges related to collision scheme, synchrotron radiation, aperture, magnet technology, and optics. We report a first assessment and various options.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 LINAC-LHC ep COLLIDER OPTIONS(European Physical Society Accelerator Group (EPS-AG), 2008) Zimmermann, F.; Bordry, F.; Braun, H.-H.; Brüning, O.S.; Burkhardt, H.; De Roeck, A.; Garoby, R.We describe various parameter scenarios for a linac-ring ep collider based on LHC and an independent electron linac. Luminosities between 1031 and 1033 cm-2s-1 can be achieved with a s.c. linac, operated either pulsed or in cw mode with optional recirculation, at a total electric wallplug power of order 20MW. Higher luminosities of several 1033 cm-2s-1 can be reached by investing more electric power or by energy recovery. Finally, merits of a linac-ring ep collider are discussed.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.
