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Title |
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| MOPPH066 |
The ARC-EN-CIEL Fourth Generation Light Source Proposal
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131 |
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- M.-E. Couprie, C. Benabderrahmane, O. V. Chubar, J. Denard, P. Dumas, J.-M. Filhol, M. Idir, M. Labat, P. Lebasque, A. Lestrade, M. Louvet, P. Marchand, O. Marcouillé, P. Mercere, P. Morin, L. S. Nadolski, L. Nahon
SOLEIL, Gif-sur-Yvette
- C. Bruni
LAL, Orsay
- E. Collet
University of Rennes, Rennes
- D. Garzella
CEA, Gif-sur-Yvette
- L. Giannessi
ENEA C. R. Frascati, Frascati (Roma)
- G. Lambert, P. Zeitoun
LOA, Palaiseau
- J. Luning
CCPMR, Paris
- M. Meyer
LIXAM, Orsay
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The ARC-EN-CIEL project proposes a suit of novel light sources for the scientific community. Three FEL (LEL1, LEL2 and LEL4) sources rely on High Gain Harmonic Generation radiation and their Non Linear Harmonics seeded with the High Order Harmonics generated in gas. LEL1 will cover the 200-1.5 nm spectral range with 100-30 fs FWHM pulses, adjustable in polarisation, at a few kHz. LEL2 will provide 10-0.6 nm radiation with planar polarisation, with 100-30 fs pulses at a few kHz repetition rate. LEL4 will cover the 2-0.2 nm range, with 50-30 fs pulses at 1 kHz. LEL3 is a FEL oscillator in the 40-8 nm range with a repetition rate of 4.5 MHz. These FEL sources will reach MW to GW of peak power. In addition, undulator radiation will provide 200 fs pulses with energies up to 20 keV. FEL calculations are presented. . The accelerator is based on superconducting technology to enable a high repetition rate. ARC-EN-CIEL is well adapted for studies in various scientific domains using coherent imaging, linear spectroscopy, pump-probe experiments, non-linear and high intensities studies. The use of plasma acceleration in the project is under investigation.
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| TUPPH015 |
Construction of Short Period APPLE II Type Undulators at SOLEIL
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265 |
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- F. Briquez, C. Benabderrahmane, O. V. Chubar, M.-E. Couprie, T. K. El Ajjouri, C. A. Kitegi, F. Marteau, A. Mary, K. Tavakoli, J. Vétéran
SOLEIL, Gif-sur-Yvette
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We present here the conception, construction and magnetic measurements of APPLE II type undulators of period 44 mm and 36 mm at SOLEIL. Such short period undulators are difficult to design and construct because of the little dimensions of the magnets, leading to small support structures which are more easily bent by the magnetic forces. The design of the support structures consists in individual aluminium holders grouped in assemblies of three or five magnets called modules and fixed on the girders using dovetails. Special extremity modules are designed to reduce field integrals of the undulator. The magnets are independently measured using Helmoltz coils and sorted in modules. Then the modules are measured using Hall probes and bodyless coil, and sorted to assemble the undulator. After assembling, a shimming is done to correct phase errors and field integrals, and a final correction of the integrals is made by little extremity magnets called "Magic Fingers". For each step of sorting, we use the home-made IDBuilder software, based on genetic algorithms. Short period undulators are of interest for the ARC-EN-CIEL project, which considers APPLE-II with a 30 mm period.
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