FEL2012 - List of Authors (Carlà, M.)

Paper	Title	Page
MOPD35	Detailed Modeling of Seeded Free-electron Lasers	101
	S. Reiche PSI, Villigen PSI, Switzerland M. Carlà UNIFI, Sesto Fiorentino (FI), Italy
	Seeding schemes for Free Electron Lasers have mostly a strong impact on the electron distribution by either a conversion of an energy modulation into a current modulation with high harmonic content (HGHG seeding) or an over-compression of this energy modulation to induce energy bands (EEHG seeding) or smear out any bunching in the electron beam (self-seeding). Most codes follow an approach to use thin electron slices, which are carefully generated to provide the correct shot-noise but which also prevents them from mixing and re-sorting the macro-particle distribution. The FEL code Genesis 1.3 has been modified to allow resolution of each individual electron. Using this approach the correct shot noise at all frequencies is provided and permits "re-binning" of the particles to the 3D radiation grid at any time. The results for self-seeding and HGHG seeding are discussed.

Paper

Title

Page

Detailed Modeling of Seeded Free-electron Lasers

101

S. Reiche
PSI, Villigen PSI, Switzerland
M. Carlà
UNIFI, Sesto Fiorentino (FI), Italy

Seeding schemes for Free Electron Lasers have mostly a strong impact on the electron distribution by either a conversion of an energy modulation into a current modulation with high harmonic content (HGHG seeding) or an over-compression of this energy modulation to induce energy bands (EEHG seeding) or smear out any bunching in the electron beam (self-seeding). Most codes follow an approach to use thin electron slices, which are carefully generated to provide the correct shot-noise but which also prevents them from mixing and re-sorting the macro-particle distribution. The FEL code Genesis 1.3 has been modified to allow resolution of each individual electron. Using this approach the correct shot noise at all frequencies is provided and permits "re-binning" of the particles to the 3D radiation grid at any time. The results for self-seeding and HGHG seeding are discussed.