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Title: The ARC-EN-CIEL French 4th Generation Light Source

Abstract

ARC-EN-CIEL (Accelerator-Radiation Complex for Enhanced Coherent Intense Extended Light) proposal is based on a CW 1 GeV superconducting linear accelerator delivering high charge, subpicosecond, low emittance electron bunches with a high repetition rate (1 kHz). The FEL uses High Harmonics Generation in gases in a High Gain Harmonic Generation scheme, leading to a rather compact solution. The radiation extends down to 0.8 nm with the non-linear harmonics and reproduces the good longitudinal and transverse coherence of the harmonics generated in gas. Optional beam loops, foreseen to increase the beam current or the energy, will accommodate infrared CSR source, femtosecond undulator sources in the VUV and X-ray ranges, and a FEL oscillator in the 10 nm range. An important synergy is expected between accelerator and laser communities, in particular for electron plasma acceleration tests.

Authors:
; ; ; ;  [1]; ; ; ; ; ; ;  [2];  [3];  [4];  [5];  [6]
  1. Synchrotron SOLEIL L'Orme des Merisiers, Saint-Aubin, BP 34 - F 91 192 Gif-sur-Yvette (France)
  2. DSM/DRECAM/SPAM, CEA Saclay (France)
  3. DAPNIA/SACM, CEA Saclay (France)
  4. LULI, Ecole Polytechnique, Palaiseau (France)
  5. CLIO-LCP, CNRS, Orsay (France)
  6. Laboratoire Aime Cotton, Orsay (France)
Publication Date:
OSTI Identifier:
21043424
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436050; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM CURRENTS; ELECTRONS; FAR ULTRAVIOLET RADIATION; FREE ELECTRON LASERS; FRENCH ORGANIZATIONS; GAIN; GEV RANGE; HARMONIC GENERATION; HARMONICS; KHZ RANGE; LASER RADIATION; LIGHT SOURCES; LINEAR ACCELERATORS; NONLINEAR PROBLEMS; OSCILLATORS; PLASMA ACCELERATION; WIGGLER MAGNETS; X RADIATION

Citation Formats

Bruni, C., Couprie, M. E., Chubar, O., Loulergue, A., Nahon, L., Carre, B., Garzella, D., Labat, M., Lambert, G., Monot, P., Jablonka, M., Meot, F., Mosnier, A., Marques, J. R., Ortega, J. M., and Nutarelli, D.. The ARC-EN-CIEL French 4th Generation Light Source. United States: N. p., 2007. Web. doi:10.1063/1.2436050.
Bruni, C., Couprie, M. E., Chubar, O., Loulergue, A., Nahon, L., Carre, B., Garzella, D., Labat, M., Lambert, G., Monot, P., Jablonka, M., Meot, F., Mosnier, A., Marques, J. R., Ortega, J. M., & Nutarelli, D.. The ARC-EN-CIEL French 4th Generation Light Source. United States. doi:10.1063/1.2436050.
Bruni, C., Couprie, M. E., Chubar, O., Loulergue, A., Nahon, L., Carre, B., Garzella, D., Labat, M., Lambert, G., Monot, P., Jablonka, M., Meot, F., Mosnier, A., Marques, J. R., Ortega, J. M., and Nutarelli, D.. Fri . "The ARC-EN-CIEL French 4th Generation Light Source". United States. doi:10.1063/1.2436050.
@article{osti_21043424,
title = {The ARC-EN-CIEL French 4th Generation Light Source},
author = {Bruni, C. and Couprie, M. E. and Chubar, O. and Loulergue, A. and Nahon, L. and Carre, B. and Garzella, D. and Labat, M. and Lambert, G. and Monot, P. and Jablonka, M. and Meot, F. and Mosnier, A. and Marques, J. R. and Ortega, J. M. and Nutarelli, D.},
abstractNote = {ARC-EN-CIEL (Accelerator-Radiation Complex for Enhanced Coherent Intense Extended Light) proposal is based on a CW 1 GeV superconducting linear accelerator delivering high charge, subpicosecond, low emittance electron bunches with a high repetition rate (1 kHz). The FEL uses High Harmonics Generation in gases in a High Gain Harmonic Generation scheme, leading to a rather compact solution. The radiation extends down to 0.8 nm with the non-linear harmonics and reproduces the good longitudinal and transverse coherence of the harmonics generated in gas. Optional beam loops, foreseen to increase the beam current or the energy, will accommodate infrared CSR source, femtosecond undulator sources in the VUV and X-ray ranges, and a FEL oscillator in the 10 nm range. An important synergy is expected between accelerator and laser communities, in particular for electron plasma acceleration tests.},
doi = {10.1063/1.2436050},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • In this paper the prospects of terahertz (THz) pulses generated at 4th generation X-ray light sources are presented on the example of recent results from a prototype set-up at the soft X-ray FEL FLASH. It is shown, that the THz pulses from the relativistic ultra short electron bunches have unique properties, that at FLASH are utilized for novel THz pump X-ray probe experiments with a robust few fs resolution. Based on these experiences it is discussed, how future facilities can benefit from implementation of similar or further improved instrumentation.
  • Activities on free-electron laser (FEL) x-ray sources, based on linear accelerators, to produce spatially coherent, ultra-short ({approx}100 fs) pulses with very high peak brilliance (10{sup 28}-10{sup 32} photons/s/mm{sup 2}/mrad{sup 2}/0.1% BW) are summarized. The scientific case includes time-resolved studies of dynamics on sub-ps scales, structural studies by imaging of non-periodic systems, and investigation of high energy-density phenomena such as non-linear x-ray optics and the production of warm dense matter. Examples are presented, with emphasis on the operational facilities, FLASH at DESY, Hamburg and LCLS in Stanford, California, and on the European XFEL project in Hamburg.
  • Here, understanding dynamics on ultrafast timescales enables unique and new insights into important processes in the materials and life sciences. In this respect, the fundamental pump-probe approach based on ultra-short photon pulses aims at the creation of stroboscopic movies. Performing such experiments at one of the many recently established accelerator-based 4th-generation light sources such as free-electron lasers or superradiant THz sources allows an enormous widening of the accessible parameter space for the excitation and/or probing light pulses. Compared to table-top devices, critical issues of this type of experiment are fluctuations of the timing between the accelerator and external laser systemsmore » and intensity instabilities of the accelerator-based photon sources. Existing solutions have so far been only demonstrated at low repetition rates and/or achieved a limited dynamic range in comparison to table-top experiments, while the 4th generation of accelerator-based light sources is based on superconducting radio-frequency technology, which enables operation at MHz or even GHz repetition rates. In this article, we present the successful demonstration of ultra-fast accelerator-laser pump-probe experiments performed at an unprecedentedly high repetition rate in the few-hundred-kHz regime and with a currently achievable optimal time resolution of 13 fs (rms). Our scheme, based on the pulse-resolved detection of multiple beam parameters relevant for the experiment, allows us to achieve an excellent sensitivity in real-world ultra-fast experiments, as demonstrated for the example of THz-field-driven coherent spin precession.« less
  • The next generation of Electron Cyclotron Resonant (ECR) ion sources are expected to operate at a heating radio frequency greater than 40 GHz. The existing 3rd generation systems, exemplified by the state of the art system VENUS, operate in the 10-28 GHz range, and use NbTi superconductors for the confinement coils. The magnetic field needed to confine the plasma scales with the rf frequency, resulting in peak fields on the magnets of the 4th generation system in excess of 10 T. High field superconductors such as Nb{sub 3}Sn must therefore be considered. The magnetic design of a 4th. generation ECRmore » ion source operating at an rf frequency of 56 GHz is considered. The analysis considers both internal and external sextupole configurations, assuming commercially available Nb{sub 3}Sn material properties. Preliminary structural design issues are discussed based on the forces and margins associated with the coils in the different configurations, leading to quantitative data for the determination of a final magnet design.« less
  • This working group on 4th Generation Light Source (4GLS) Instrumentation was a follow-up to the opening-discussion on Challenges in Beam Profiling. It was in parallel with the Feedback Systems session. We filled the SSRL Conference Room with about 25 participants. The session opened with an introduction by Lumpkin. The target beam parameter values for a few-angstrom, self-amplified spontaneous emissions (SASE) experiment and for a diffraction-limited soft x-ray storage ring source were addressed. Instrument resolution would of course need to be 2-3 times better than the value measured, if possible. The nominal targeted performance parameters are emittance (1-2{pi} mm mrad), bunchmore » length (100 fs), peak-current (l-5 kA), beam size (10 {micro}m), beam divergence (1 {micro}rad), energy spread (2 x 10{sup {minus}4}), and beam energy (10's of GeV). These are mostly the SASE values, and the possible parameters for a diffraction-limited soft x-ray source would be relaxed somewhat. Beam stability and alignment specifications in the sub-micron domain for either device are anticipated.« less