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Conference Paper

Design and Performance of the Wedged Pole Hybrid Undulator for the Fritz-Haber-Institut IR FEL

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons21548

Gewinner,  Sandy
Molecular Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21684

Junkes,  Heinz
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21859

Meijer,  Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22079

Schöllkopf,  Wieland
Molecular Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22295

Zhang,  Weiqing
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

FEL2012_Nara_3SG.pdf
(Publisher version), 689KB

Supplementary Material (public)
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Citation

Gottschalk, S., DeHart, T., Kelly, R., Offenbacker, M., Valla, A., Bluem, H., et al. (2013). Design and Performance of the Wedged Pole Hybrid Undulator for the Fritz-Haber-Institut IR FEL. In Proceedings of FEL 2012, Nara, Japan (pp. 575-578). Retrieved from http://accelconf.web.cern.ch/AccelConf/FEL2012/papers/thpd13.pdf.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-6600-4
Abstract
An IR and THz FEL with a design wavelength range from 4 to 500 μm has been commissioned at the Fritz- Haber-Institut (FHI) in Berlin, Germany. Lasing at 28 MeV and a wavelength of 16 μm was achieved in February 2012 [1]. We describe the performance of the undulator built and installed at FHI by STI Optronics for use in the mid-IR range (<50 μm) and 15- to 50-MeV beam energy. The undulator was a high-field-strength wedged-pole hybrid (WPH) with 40-mm period, 2.0-m long, and minimum gap 16.5 mm. A new improvement was including radiation resistance in the magnetic design. We will discuss the measured magnetic and mechanical performance, central and zero steering/offset end-field magnetic designs, key features of the mechanical design and gap adjustment system, genetic shimming algorithms, and control system.