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MOOBB02 |
Laser-induced CSR: Toward a Probe to Explore Wakefields in Storage Rings |
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- S. Bielawski, C. Evain, E. Roussel, C. Szwaj, T. Tanikawa
PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France
- M. Adachi, M. Katoh
UVSOR, Okazaki, Japan
- M. Hosaka, N. Yamamoto
Nagoya University, Nagoya, Japan
- M. Le Parquier
CERLA, Villeneuve d'Ascq, France
- H. Zen
Kyoto University, Institute for Advanced Energy, Kyoto, Japan
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In a storage ring, it is possible to imprint a sine modulation in the longitudinal phase space of an electron bunch, using interaction with an external laser. This typically leads to narrowband THz emission, as has been demonstrated at UVSOR-II*. This opens a new way to explore the dynamics of electrons bunches, by monitoring the transient following the sine perturbation. Here, we perform this type of experimental study at UVSOR, just below the CSR instability threshold. Then we perform corresponding numerical calculations using a Vlasov-Fokker-Planck modeling, including CSR wakefield. The data provided by these "laser manipulation experiments" are dependent on the wakefields, for some ranges of the excited wavenumber. Hence these laser experiments provide a new tool for testing dynamical models of storage rings, as CSR instability models.
* C. Evain et al., Phys. Rev. ST Accel. Beams 13, 090703 (2010); S. Bielawski et al., Nature Physics 4, 390 (2008).
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Slides MOOBB02 [2.923 MB]
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| TUPPP005 |
LUNEX5: A French FEL Test Facility Light Source Proposal |
1611 |
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- A. Loulergue, C. Benabderrahmane, M. Bessière, P. Betinelli-Deck, F. Bouvet, A. Buteau, L. Cassinari, M.-E. Couprie, J. Daillant, J.-C. Denard, P. Eymard, B. Gagey, C. Herbeaux, M. Labat, A. Lestrade, P. Marchand, J.L. Marlats, C. Miron, P. Morin, A. Nadji, F. Polack, J.B. Pruvost, F. Ribeiro, J.P. Ricaud, P. Roy
SOLEIL, Gif-sur-Yvette, France
- S. Bielawski, C. Evain, C. Szwaj
PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France
- B. Carré
CEA/DSM/DRECAM/SPAM, Gif-sur-Yvette, France
- G. Devanz, M. Luong
CEA/DSM/IRFU, France
- L. Farvacque, G. Lebec
ESRF, Grenoble, France
- G. Lambert, A. Lifschitz, V. Malka, A. Rousse
LOA, Palaiseau, France
- M. Le Parquier
CERLA, Villeneuve d'Ascq, France
- J. Lüning
CCPMR, Paris, France
- R. Roux
LAL, Orsay, France
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LUNEX5 is a new synchrotron FEL source project aiming at delivering short and coherent X-ray pulses to probe ultrafast phenomena at the femto-second scale, to investigate extremely low density samples as well as to image individual nm scale objects. The proposed machine layout is based on a 400 MeV super-conducting Conventional Linear Accelerator (CLA) mainly composed of 2 XFEL type cryo-modules together with a normal-conducting high brightness photo RF gun. This present mature and reliable technology is able to deliver high quality electron bunches up to few kHz suitable for user experiments. Further more, the last decade improvement in synchronization and stability offer a fertile land to explore the different and innovative seeded FEL operations aiming at producing higher coherence and energetic X-rays for the pilot user full benefits. In parallel of the CLA branch, the very promising and highly innovative Laser Wake-Field Accelerator (LWFA) able to produce very short electron bunches in the range of the femto-second and high peak current up to few GeV is foreseen as a FEL bench test using the same undulator lines.
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