| 1. |
- Bahrdt, Johannes, et al.
(författare)
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Diagnostic Tools for the Undulator System of the Seeded HGHG-FEL at MAX-lab
- 2008
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Ingår i: Proceedings of FEL08. ; , s. 243-246
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Konferensbidrag (refereegranskat)abstract
- Within a collaboration between MAX-lab and BESSY a one stage seeded HGHG-FEL has been set up at Maxlab. BESSY has built the undulator system consisting of a modulator, a radiator and an electromagnetic chicane. BESSY has also installed three types of diagnostic tools: optical fibres for a fast Cherenkov beam loss detection, optical fibres for absolute dose measurements via their radiation-induced attenuation and THz detectors for the characterization of electron bunch properties. During first injections with a laser driven rf-gun the Cherenkov fibres have delivered detailed spatial information on the beam losses inside the beamline. Over the last year the second system, based on powermeter measurements, has detected a total dose of 180Gy. The high sensitivity and low drift of this system has been demonstrated. A THz detector behind the last dipole magnet close to the beam dump provides information on the bunch compression and the laser induced energy modulation. We report on the measurements performed with these diagnostics tools.
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| 2. |
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| 4. |
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| 5. |
- Brandin, Mathias, et al.
(författare)
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Status of the fel test facility at MAX-LAB
- 2007
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Ingår i: ; , s. 513-516
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Konferensbidrag (refereegranskat)abstract
- An FEL test facility is built on the existing MAX-lab linac system in collaboration between MAX-lab and BESSY. The goal is to study and analyse seeding, harmonic generation, beam compression and diagnostic techniques with the focus of gaining knowledge and experience for the MAX IV FEL and the BESSY FEL projects. The test facility will in the first stage be using the 400 MeV linac beam to generate the third harmonic at 88 nm from a 266 nm Ti:Sapphire seed laser. The optical klystron is installed and magnetic system, gun and seed laser systems are currently being finalised. Start-to-end simulations have been performed and operation modes for bunch compression defined. The linac and beam transport system is already in operation.
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| 6. |
- Brandin, Mathias, et al.
(författare)
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The Synchrotron Radiation and Free Electron Laser Project MAX IV at MAX-lab
- 2008
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Ingår i: Journal of Physics Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596. ; 100
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The proposed MAX IV facility at MAX-lab, Lund University is presented. The project consists of two storage rings at 1.5 and 3 GeV respectively, a 3 GeV linac injector, a facility for short pulses and a Free Electron Laser. The storage rings will cover a broad spectral range and are designed to reach the diffraction limit in a large wavelength range. A new innovative magnet concept and lattice form the back bone of the ring design. Short photon pulses will be generated with compressed pulses from the linac system and coherent pulses by a Free Electron Laser operating in the HGHG mode. The project has received the highest marks in the scientific evaluations both concerning machine design and scientific program.
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| 7. |
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| 8. |
- Curbis, Francesca, et al.
(författare)
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Commissioning of the test fel at MAX-Lab
- 2008
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Ingår i: Proceedings of FEL08. ; , s. 556-559
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Konferensbidrag (refereegranskat)abstract
- An installation for testing techniques related to seeding and harmonic generation has been completed at MAXlab. The aim is to study the processes around seeded harmonic generation at 130/88/54 nm, the 2/3/5 harmonic of a Ti: Sapphire laser. During the spring 2008 the commissioning work has begun and this paper will report on the progress. The test FEL is built around the existing linac injector at MAX-lab. This source can provide 4-500 MeV electrons from an RF-gun. A combined laser system both driving the photo cathode in the gun and, synchronised via an optical fibre, the seed laser pulse has been put into operation. An optical klystron, consisting of two 30 period undulators and a 4-magnet chicane, is in operation. Beam loss monitors along the optical klystron are in use and a THz system for additional synchronisation studies installed. Results from electron beam optics and operation generating spontaneous radiation is already available and synchronisation results immediate. The work is in progress and new results are added continuously to the portfolio.
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| 9. |
- Cutic, Nino, et al.
(författare)
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An electro-optical system for MAX-lab test-fel facility
- 2009
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Ingår i: ; , s. 685-687
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Konferensbidrag (refereegranskat)abstract
- To get information about arrival of the electron bunch relative to the laser pulse; electro-optic detection scheme in near-crossed polarizer configuration was set up and tested. Electron bunch induced birefringence in ZnTe crystal leaves a polarization footprint in a chirped infrared pulse. The IR pulse is sampled before third harmonic generation from the amplifier, stretched and synchronized to the ultraviolet beam that is used for seeding. We report details of this setup and preliminary jitter measurements.
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| 10. |
- Cutic, Nino, et al.
(författare)
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SEEDING OF THE TEST-FEL AT MAX-LAB
- 2008
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Ingår i: Proceedings of EPAC08. ; , s. 76-78
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Konferensbidrag (refereegranskat)abstract
- The installation of the test FEL at MAX-lab has recently been completed. The system will be seeded by a tripled Ti:Sapphire laser (263 nm) synchronized to the RF system and the gun laser. Issues important for the seeding will be presented, ranging from the laser system via the layout of photon and electron optics to timing/synchronization and the theoretical approach.
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