Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 72: Beschleunigerphysik XIII (Synchrotronstrahlung/THz)
HK 72.7: Talk
Thursday, March 7, 2013, 15:30–15:45, WIL-C207
Design of a transmission grating hard X-ray spectrometer for laser-driven undulator sources — •Christian Werle1, Nathaniel Kajumba2, Andreas Maier1, Benno Zeitler1, Niels Delbos1, and Florian Grüner1 — 1University of Hamburg / CFEL, Hamburg, Germany — 2Ludwig Maximilian University, Munich, Germany
State-of-the-art laser-driven undulator sources are already becoming very versatile and powerful light sources, especially due to their wavelength tunability and ultra-short pulses. However, being still in development, they suffer from instabilities, which can make the spectral characterization of their radiation rather challenging, especially in the few-nm range. The hard X-ray transmission grating spectrometer, presented in this talk, was specifically optimized to tackle these difficulties. Its simple base design and its fully motorized optical components grant a high degree of flexibility during operation, fitting nicely to the nature of this radiation source. During calibration the device has been proven to measure wavelengths from 18 nm to 5 nm, but was in general also designed to address the sub-nm range. Following these test runs, the spectrometer was installed during a undulator campaign and was successfully used to measure laser-driven undulator radiation from 100 eV up to 300 eV, being the highest energy photons ever demonstrated with such a source.