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2002•PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)Open access

The TESLA X-FEL injector

Klaus Flöttmann, P. Piot, M. Ferrario, Bagrat A. Grigoryan

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Abstract

The high-brightness beams demanded to drive future short-wavelength SASE FEL-based light sources result in stringent demands on the electron beam source. In the foreseen TESLA X-FEL, a slice emittance (over the cooperation length) of less than 1.6 mm-mrd and a rms bunch length of /spl sim/25 /spl mu/m (corresponding to a peak current of 5 kA) are required at the undulator entrance. In this paper, we present the conceptual design of the photoinjector system for the TESLA X-FEL including Beam Dynamics studies performed with the codes ASTRA and HOMDYN. The proposed injector can generate 1 nC bunches with mm-mrd transverse emittances and longitudinal emittance of 60 keV-mm at an energy of 140 MeV.

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The high-brightness beams demanded to drive future short-wavelength SASE FEL-based light sources result in stringent demands on the electron beam source. In the foreseen TESLA X-FEL, a slice emittance (over the cooperation length) of less than 1.6 mm-mrd and a rms bunch length of /spl sim/25 /spl mu/m (corresponding to a peak current of 5 kA) are required at the undulator entrance. In this paper, we present the conceptual design of the photoinjector system for the TESLA X-FEL including Beam Dynamics studies performed with the codes ASTRA and HOMDYN. The proposed injector can generate 1 nC bunches with mm-mrd transverse emittances and longitudinal emittance of 60 keV-mm at an energy of 140 MeV.

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Available abstract

The high-brightness beams demanded to drive future short-wavelength SASE FEL-based light sources result in stringent demands on the electron beam source. In the foreseen TESLA X-FEL, a slice emittance (over the cooperation length) of less than 1.6 mm-mrd and a rms bunch length of /spl sim/25 /spl mu/m (corresponding to a peak current of 5 kA) are required at the undulator entrance. In this paper, we present the conceptual design of the photoinjector system for the TESLA X-FEL including Beam Dynamics studies performed with the codes ASTRA and HOMDYN. The proposed injector can generate 1 nC bunches with mm-mrd transverse emittances and longitudinal emittance of 60 keV-mm at an energy of 140 MeV.

Key concepts: Physics, Undulator, Thermal emittance, Bunches, Injector, Optics, Brightness, Beam (structure)

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