Dr. Michael Abo-Bakr Profile

Dr. Michael Abo-Bakr

at Bessy GmbH

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Proceedings Article | 30 August 2005 Paper

Status of the BESSY-FEL project

M. Abo-Bakr

Proceedings Volume 5917, 591702 (2005) https://doi.org/10.1117/12.624507

KEYWORDS: Free electron lasers, Magnetism, Mirrors, Electron beams, Cryogenics, Pulsed laser operation, Superconductors, X-rays, Modulators

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The Berliner Elektronenspeicherring-Gesellschaft fuer Synchrotronstrahlung (BESSY) proposes a 2^nd generation FEL Soft X-ray user facility (BESSY FEL) in addition to the currently operating 3^rd generation light source BESSY II. The BESSY FEL will deliver photon pulses in the wavelength range of 51nm ≤ λ ≤ 1.2nm with pulse durations of a few tens of femtoseconds. To produce these short pulses and to ensure a high shot-to-shot stability a cascaded HGHG FEL scheme is proposed, where the wavelength and pulse duration is determined by an external seeding laser. It is expected to achieve a peak-brilliance of 10³¹ photons/(s mm² mrad² 0.1%BW), with GW peak power over the full spectral range. The main components of the BESSY FEL are a photo-cathode injector, a superconducting 2.3 GeV CW-Linac and three independently operating HGHG FEL sections, serving a total of 9 beamlines. A status report is given, including a detailed description of the layout and of the numerical simulations, performed to optimize the machine.

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