Mr. Florian Perlick Profile

Florian Perlick

at DESY

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Proceedings Article | 3 May 2013 Paper

An electron beam detector for the FLASH II beam dump

J. Good, G. Kube, N. Leuschner, F. Perlick, M. Sachwitz, M. Schmitz, K. Wittenburg, T. Wohlenberg

Proceedings Volume 8778, 87781D (2013) https://doi.org/10.1117/12.2021392

KEYWORDS: Mirrors, Sensors, Optical fibers, Electron beams, Lenses, Cameras, Free electron lasers, CCD cameras, Zoom lenses, 3D modeling

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After the generation of the laser light, a dipole deflects the highly energetic electron beam of FLASH (Free Electron Laser Hamburg) into a dump. A detector is developed to monitor the position, dimensions and profile of the electron beam. Scintillation light is emitted due to the electrons hitting a luminescent screen located in front of the dump aperture. This light is guided by an optical system external to the vacuum to a CCD camera for optical analysis of the generated image. In this paper the layouts of two different optical systems are presented, both of which will be redundantly installed at FLASH II. The conventional lens-mirror-arrangement, consisting of three single collecting lenses, two mirrors and a zoom lens, is supposed to have a theoretical resolution of 0.25 mm. The second optical system is based on radiation-hard optical fibres. For the latter it is planned to test the impact of radiation on the optical qualities of the bundle by installing it into a “radioactive hot spot” at the bunch compressor in the FLASH accelerator. This test setup will also be presented.

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