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MOOAI1 |
Tribute to Pascal Elleaume |
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- M.-E. Couprie
SOLEIL, Gif-sur-Yvette, France
- M.-E. Couprie
CEA/DSM, Gif-sur-Yvette, France
- J.-M. Ortega
LCP/CLIO, Orsay, Cedex, France
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Tribute to Pascal Elleaume
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Slides MOOAI1 [9.432 MB]
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| MOOA2 |
First Lasing of the ALICE IR-FEL at Daresbury Laboratory |
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- D.J. Dunning, S. Leonard, A.D. Smith
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
- J.A. Clarke, Y.M. Saveliev, N. Thompson
Cockcroft Institute, Warrington, Cheshire, United Kingdom
- M. Surman
STFC/DL/SRD, Daresbury, Warrington, Cheshire, United Kingdom
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We report the first lasing of the ALICE IR-FEL, an oscillator FEL at the UK’s STFC Daresbury Laboratory. The ALICE (Accelerators and Lasers In Combined Experiments) facility is a testbed for advanced accelerator technologies and experiments, based on an Energy Recovery Linac (ERL) accelerator. First lasing of the ALICE IR-FEL was achieved on October 23rd 2010, making it the first FEL to operate in the UK, and the first FEL based on an ERL accelerator in Europe. First lasing was achieved at 27.5 MeV electron beam energy and 8 μm radiation wavelength. This report describes the steps taken in commissioning the FEL, and the characterisation of the FEL performance and output. Continuous wavelength tuning between 5.7-8 μm (through varying the undulator gap) has been demonstrated.
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Slides MOOA2 [3.435 MB]
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MOOA3 |
First Lasing of the FERMI@elettra seeded FEL |
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- G. Penco
ELETTRA, Basovizza, Italy
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Commissioning of the FERMI@elettra FEL-1 line started in August 2009. A challenging program of installations and machine commissioning has been carried out until the end of 2010. Efforts have been spent to optimize the photo-injector performance, to implement the one-stage magnetic compresssion of the electron bunch length and to accelerate the electron beam to the design energy of 1.2 GeV. In the fourth trimester of 2010 seven undulator segments have been installed. The first seeded FEL light was generated at the fundamental wavelength of 43 nm in December 2010. Further FEL optimization has been performed in the first half of 2011: the FEL peak power and stability have been improved. FEL output in the wavelength range 52 nm to 32 nm has been provided to the beam lines and experimental stations for preliminary tests.
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Slides MOOA3 [4.066 MB]
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MOOA4 |
Fist Lasing of SACLA |
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- T. Shintake
RIKEN Spring-8 Harima, Hyogo, Japan
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On June 7 2011, we observed the first lasing X-ray at 1.2 Angstrom in our new X-ray FEL (SACLA) in Japan. The construction project, previously called XFEL/Japan, started in 2006 at SPring-8, spending four and half years for civil construction, fabrication of hardware components, installation and another half year for high power processing and debugging, then completed in March 2011. After three-month beam commissioning and tuning, we tried lasing at 7.1 GeV, by sending beam into the undulator line. We slowly closed undulator gaps from upstream, when we came to 8th undulator, we firstly observed a bright spot on YAG-screen in a middle of spontaneous radiation. Using whole undulators (sixteen of 5 m each), the power reached to 20 μJ/pulse at 30 fsec with 3 kA beam. The FEL power has not yet reached to its saturation level. We currently tuning whole machine, and preparing for X-ray experiments from this autumn run. The accelerator construction itself was a big project and tremendous effort was made by Joint Construction Team (JASRI+RIKEN) and a large number of industry people. We would like to thank all contributors and all friends in FEL community.
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Slides MOOA4 [3.858 MB]
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| MOOA5 |
Coherent Harmonic Generation at the DELTA Storage Ring |
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- H. Huck, M. Bakr, M. Höner, S. Khan, R. Molo, A. Nowaczyk, A. Schick, P. Ungelenk, M. Zeinalzadeh
DELTA, Dortmund, Germany
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Funding: Supported by DFG, BMBF, and the Federal State NRW
First commissioning results from a new Coherent Harmonic Generation (CHG) source, recently installed at the DELTA storage ring, are presented. DELTA, a university-operated synchrotron light source in Dortmund, has successfully operated an optical klystron as storage-ring FEL. After installing a Ti:sapphire laser system and new undulator power supplies earlier this year, the optical klystron can be seeded using ultrashort pulses at 800 nm wavelength and harmonics thereof during standard operation of the storage ring at 1.5 GeV. The energy modulation induced within a short slice of an electron bunch is converted to a density modulation and the micro-bunched electrons emit ultrashort pulses coherently at harmonics of the initial wavelength. Several meters downstream of the optical klystron, path length differences of the energy-modulated electrons cause a dip in the charge distribution, giving rise to coherent ultrashort THz pulses which are extracted using a dedicated beamline.
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Slides MOOA5 [2.605 MB]
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