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Studies on a free electron laser for the TESLA test facility

We present the layout of a Single Pass FEL to be driven by the TESLA Test Facility (TTF) currently under construction at DESY. The TTF is a test-bed for high-gradient, high efficiency superconducting accelerating sections for a future linear collider. Due to its unrivaled ability to sustain high beam quality during acceleration, a superconducting rf linac is considered the optimum choice to drive a Free Electron Laser (FEL). We aim at a photon wavelength of /spl lambda/=6 nm utilizing the TTF after it has been extended to 1 GeV beam energy. A first test is foreseen at a larger photon wavelength.