002777789 001__ 2777789
002777789 005__ 20231124082445.0
002777789 0248_ $$aoai:cds.cern.ch:2777789$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002777789 0247_ $$2DOI$$9APS$$a10.1103/PhysRevAccelBeams.24.100701$$qpublication
002777789 037__ $$9arXiv$$aarXiv:2107.13331$$cphysics.acc-ph
002777789 035__ $$9arXiv$$aoai:arXiv.org:2107.13331
002777789 035__ $$9Inspire$$aoai:inspirehep.net:1894414$$d2023-11-23T10:18:06Z$$h2023-11-24T03:01:17Z$$mmarcxml$$ttrue$$uhttps://inspirehep.net/api/oai2d
002777789 035__ $$9Inspire$$a1894414
002777789 041__ $$aeng
002777789 100__ $$aNergiz, [email protected]$$uNigde U.$$vNigde Omer Halisdemir University, Faculty of Arts and Sciences, Physics Department, 51200 Nigde, Turkey
002777789 245__ $$9APS$$aBright Ångstrom and picometer free electron laser based on the Large Hadron electron Collider energy recovery linac
002777789 246__ $$9arXiv$$aBright Ångstrom and Picometre Free Electron Laser Based on the LHeC Energy Recovery Linac
002777789 269__ $$c2021-07-28
002777789 260__ $$c2021-10-01
002777789 300__ $$a13 p
002777789 500__ $$9arXiv$$a13 pages, 13 figures, submitted to Physical Review Accelerators and
Beams (PRAB)
002777789 520__ $$9APS$$aThe Large Hadron electron Collider (LHeC) is a proposed future particle-physics project colliding 60 GeV electrons from a six-pass recirculating energy-recovery linac (ERL) with 7 TeV protons stored in the LHC. The ERL technology allows for much higher beam current and, therefore, higher luminosity than a traditional linac. The high-current, high-energy electron beam can also be used to drive a free electron laser (FEL). In this study, we investigate the performance of an LHeC-based FEL, operated in the self-amplified spontaneous emission mode using electron beams after one or two turns, with beam energies of, e.g., 10, 20, 30 and 40 GeV, and aim at producing x-ray pulses at wavelengths ranging from 8 to 0.5 Å. In addition, we explore a possible path to use the 40 GeV electron beam for generating photon pulses at much lower wavelengths, down to a few picometer. We demonstrate that such ERL-based high-energy FEL would have the potential to provide orders of magnitude higher average brilliance at Å wavelengths than any other FEL either existing or proposed. It might also allow a pioneering step into the picometer wavelength regime.
002777789 520__ $$9arXiv$$aThe Large Hadron electron Collider (LHeC) is a proposed future particle-physics project colliding 60 GeV electrons from a six-pass recirculating energy-recovery Linac (ERL) with 7 TeV protons stored in the LHC. The ERL technology allows for much higher beam current and, therefore, higher luminosity than a traditional Linac. The high-current, high-energy electron beam can also be used to drive a free electron laser (FEL). In this study, we investigate the performance of an LHeC-based FEL, operated in the self-amplified spontaneous emission mode using electron beams after one or two turns, with beam energies of, e.g., 10, 20, 30 and 40 GeV, and aim at producing X-ray pulses at wavelengths ranging from 8~Å to 0.5~Å . In addition, we explore a possible path to use the 40 GeV electron beam for generating photon pulses at much lower wavelengths, down to a few picometre. We demonstrate that such ERL-based high-energy FEL would have the potential to provide orders of magnitude higher average brilliance at Å wavelengths than any other FEL either existing or proposed. It might also allow a pioneering step into the picometre wavelength regime.
002777789 540__ $$3preprint$$aCC BY 4.0$$uhttp://creativecommons.org/licenses/by/4.0/
002777789 540__ $$3publication$$aCC BY 4.0$$uhttps://creativecommons.org/licenses/by/4.0/
002777789 542__ $$3publication$$dauthors$$g2021
002777789 65017 $$2arXiv$$ahep-ex
002777789 65017 $$2SzGeCERN$$aParticle Physics - Experiment
002777789 65017 $$2arXiv$$aphysics.acc-ph
002777789 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
002777789 690C_ $$aCERN
002777789 690C_ $$aARTICLE
002777789 693__ $$sCERN LHeC
002777789 700__ $$aMirian, N.S.$$uCERN$$uDESY$$vDeutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany, and European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
002777789 700__ $$aAksoy, A.$$uAnkara U.$$vAnkara University, Institute of Accelerator Technologies, 06830, Ankara, Turkey, and Turkish Accelerator and Radiation Laboratory, 06830, Ankara, Turkey
002777789 700__ $$aZhou, D.$$uKEK, Tsukuba$$vHigh Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan
002777789 700__ $$aZimmermann, F.$$uCERN$$vEuropean Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
002777789 700__ $$aAksakal, H.$$uKahramanmaras U.$$vKahraman Maras Sutcu Imam University, 46040 Kahramanmaras, Turkey
002777789 773__ $$c100701$$mpublication$$n10$$pPhys. Rev. Accel. Beams$$v24$$y2021
002777789 8564_ $$82314322$$s32310$$uhttp://cds.cern.ch/record/2777789/files/energyS.png$$y00011 (Left) The evolution of beam energy spread ($\sigma_{E}$) along the undulator region for 0.5 \AA\ via 40 GeV e-beam energy through planar undulator. (Right) Longitudinal phase-space of e-beam after FEL radiation at 0.5~\AA .
002777789 8564_ $$82314323$$s6518$$uhttp://cds.cern.ch/record/2777789/files/DeltaU.png$$y00009 Radiation wavelength (left axis, blue) and $K$ value (right axis, green) for a 40 GeV electron beam passing through the Delta undulator as a function of the gap of undulator, in case of helical (solid lines) or planar mode of operation (dashed lines). The period length of the undulator is taken to be 18 mm.
002777789 8564_ $$82314324$$s118443$$uhttp://cds.cern.ch/record/2777789/files/ps40Gev.png$$y00004 Beam distribution in longitudinal phase space after passing through linac 1 (top left) linac 2 (top right), linac 3 (bottom left) and linac 4 (bottom right) for 40 GeV FEL operation, obtained by tracking with ELEGANT \cite{elegant}, including the linac wake fields from Ref.~\cite{Pellegrini:2235763}, and the shielded CSR impedance from CSRZ \cite{zhoujjap}.
002777789 8564_ $$82314325$$s55094$$uhttp://cds.cern.ch/record/2777789/files/ps20Gev.png$$y00003 Beam distribution in longitudinal phase space after passing through linac 1 (left) and linac 2 (right) for 20 GeV FEL operation, obtained by tracking with ELEGANT \cite{elegant}, including the linac wake fields from Ref.~\cite{Pellegrini:2235763}, and the shielded CSR impedance from CSRZ \cite{zhoujjap}. The white dash-dotted line represents the current profile. The final FWHM bunch length is 63 fs, or 19 $\mu$m, and the fitted rms bunch length $\sigma_{z}=8.5$~$\mu$m.
002777789 8564_ $$82314326$$s2940300$$uhttp://cds.cern.ch/record/2777789/files/2107.13331.pdf$$yFulltext
002777789 8564_ $$82314327$$s15782$$uhttp://cds.cern.ch/record/2777789/files/Imp_all.png$$y00002 CSR wake field for a Gaussian bunch with 50 micron bunch length (left) and impedance (right) for a 4-m long arc dipole with $\rho=744$~m computed by the code CSRZ \cite{zhoujjap} for a square beam pipe with 2 cm (blue) or 1 cm full aperture (red) in the horizontal and vertical direction, compared with the CSR wake and impedance calculated for a simple parallel plate model with a vertical gap of 2 cm (green). In the right picture, solid lines refer to the real part, dashed lines to the imaginary part of the impedance.
002777789 8564_ $$82314328$$s6785$$uhttp://cds.cern.ch/record/2777789/files/averagebrilliance.png$$y00008 Comparison of FEL peak and average brilliance for the LHeC-FEL with several existing or planned hard X-ray FEL and SR sources \cite{focus}.
002777789 8564_ $$82314329$$s7620$$uhttp://cds.cern.ch/record/2777789/files/peakbrilliance.png$$y00007 Comparison of FEL peak and average brilliance for the LHeC-FEL with several existing or planned hard X-ray FEL and SR sources \cite{focus}.
002777789 8564_ $$82314330$$s40452$$uhttp://cds.cern.ch/record/2777789/files/pulse2.png$$y00006 Spatial profile of the radiation pulse (left), wavelength spectrum of the radiation (centre) and transverse cross section of the of FEL radiation pulse around the point of saturation (right) for a beam energy of 10, 20, 30 and 40 GeV (from top to bottom), as simulated with GENESIS, using the respective distribution of the accelerated beam, obtained from ELEGANT, as input.
002777789 8564_ $$82314331$$s36715$$uhttp://cds.cern.ch/record/2777789/files/fig1.png$$y00000 LHeC recirculating linac reconfigured for FEL operation.
002777789 8564_ $$82314332$$s24066$$uhttp://cds.cern.ch/record/2777789/files/sigma_decelerate_600MeV.png$$y00012 Beam energy and beta functions for the deceleration of the spent beam, after lasing at 0.5~\AA , over two complete LHeC turns starting from 40 GeV.
002777789 8564_ $$82314333$$s28423$$uhttp://cds.cern.ch/record/2777789/files/Wake_all.png$$y00001 CSR wake field for a Gaussian bunch with 50 micron bunch length (left) and impedance (right) for a 4-m long arc dipole with $\rho=744$~m computed by the code CSRZ \cite{zhoujjap} for a square beam pipe with 2 cm (blue) or 1 cm full aperture (red) in the horizontal and vertical direction, compared with the CSR wake and impedance calculated for a simple parallel plate model with a vertical gap of 2 cm (green). In the right picture, solid lines refer to the real part, dashed lines to the imaginary part of the impedance.
002777789 8564_ $$82314334$$s22300$$uhttp://cds.cern.ch/record/2777789/files/2power_z.png$$y00010 Simulated power growth for cases of helical (H) and linear (L) polarization of sub 10 pm radiation wavelengths. The simulations were performed for an electron beam of either 30 GeV (black lines) or 40 GeV (red and blue lines) passing through a helical or planar Delta undulator FEL line.
002777789 8564_ $$82314335$$s26485$$uhttp://cds.cern.ch/record/2777789/files/power_z.png$$y00005 Growth of photon pulse power at 7.6 $\textrm{\AA}$ (black line) 2 $\textrm{\AA}$ (red dotted), 1 $\textrm{\AA}$ (magenta dot-dashed) and 0.5 $\textrm{\AA}$ (blue dashed) for an LHeC electron beam of energy 10, 20, 30 and 40 GeV, respectively, passing through the undulator FEL line with period $\lambda_u=39$~mm, as simulated with the code GENESIS.
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002777789 980__ $$aARTICLE