FEL2012 - List of Authors (Gisselbrecht, M.)

Paper	Title	Page
TUPD15	Seeded Coherent Harmonic Generation with in-line Gas Target	265
	F. Curbis, N. Čutić, O. Karlberg, F. Lindau, E. Mansten, S. Thorin, S. Werin MAX-lab, Lund, Sweden F. Brizuela, B. Kim, D. Kroon, A. L'Huillier Lund University, Division of Atomic Physics, Lund, Sweden M. Gisselbrecht SLF, Lund, Sweden
	The test-FEL at MAX-lab already demonstrated seeded coherent harmonic generation down to 40 nm. As next step in the development of seeding techniques we plan to use a gas target to generate harmonics of the drive laser and seed the electron beam with them. In order to optimize the injection process, our aim is to place the gas target for harmonic generation as close as possible to the first undulator. In order to minimize the losses the transport of the drive laser is done with a minimal number of mirrors and there are neither focusing nor filtering elements between the harmonic chamber and the first undulator. This will be the first experiment that will imprint energy modulation to the electron beam by harmonics generated in gas. The wavelength range of the harmonics that will be used as seed is around 100 nm and we plan to detect the coherent harmonic signal of the second harmonic generated in the radiator. The flexibility of the set-up will allow to drive the HG process with the fundamental wavelength or the second harmonic or the combination of them. Adding the second harmonic will lead to the generation of even harmonics, thus increasing the range of seeding wavelength. N. Cutic, et al., "Vacuum ultraviolet circularly polarized coherent femtosecond pulses from laser seeded relativistic electrons", Phys. Rev. Spec. Top. Accel. Beams 14, 030706 (2011)*

Paper

Title

Page

Seeded Coherent Harmonic Generation with in-line Gas Target

265

F. Curbis, N. Čutić, O. Karlberg, F. Lindau, E. Mansten, S. Thorin, S. Werin
MAX-lab, Lund, Sweden
F. Brizuela, B. Kim, D. Kroon, A. L'Huillier
Lund University, Division of Atomic Physics, Lund, Sweden
M. Gisselbrecht
SLF, Lund, Sweden

The test-FEL at MAX-lab already demonstrated seeded coherent harmonic generation down to 40 nm*. As next step in the development of seeding techniques we plan to use a gas target to generate harmonics of the drive laser and seed the electron beam with them. In order to optimize the injection process, our aim is to place the gas target for harmonic generation as close as possible to the first undulator. In order to minimize the losses the transport of the drive laser is done with a minimal number of mirrors and there are neither focusing nor filtering elements between the harmonic chamber and the first undulator. This will be the first experiment that will imprint energy modulation to the electron beam by harmonics generated in gas. The wavelength range of the harmonics that will be used as seed is around 100 nm and we plan to detect the coherent harmonic signal of the second harmonic generated in the radiator. The flexibility of the set-up will allow to drive the HG process with the fundamental wavelength or the second harmonic or the combination of them. Adding the second harmonic will lead to the generation of even harmonics, thus increasing the range of seeding wavelength.
N. Cutic, et al., "Vacuum ultraviolet circularly polarized coherent femtosecond pulses from laser seeded relativistic electrons", Phys. Rev. Spec. Top. Accel. Beams 14, 030706 (2011)