P07 HEMS
The High Energy Materials Science Beamline (HEMS)
Setup of an experiment at HEMS Copyright: Hereon/Christian Schmid
The High Energy Materials Science Beamline HEMS at PETRA III has a main energy of 100 keV, tunable in the range 30 to 200 keV, and is optimized for micrometer focusing with Compound Refractive Lenses (CRLs).
Design, construction, operation and main funding are the responsibility of the Helmholtz-Zentrum Hereon. Approximately 70 % of the beamtime is dedicated to Materials Research, the rest reserved for "general physics” experiments supported by DESY.
The materials science and general physics activities are threefold:
1) Fundamental research encompasses metallurgy, physics, chemistry, biology etc. which are more and more merging. Experiments had been done for the investigation of the relation between macroscopic and micro-structural properties of polycrystalline materials, grain-grain-interactions, recrystallisation processes, the development of new & smart materials or processes, and in situ catalysis mechanisms. Generally, all kinds of matter can be studied with high precision, high stability and low background: surfaces, interfaces, bulk single crystals, powders as well as amorphous materials in a large reciprocal space.
2) Applied research for manufacturing process optimization benefits from high flux in combination with fast detector systems allowing complex and highly dynamic in-situ studies of microstructural transformations, e.g. during welding and loading processes. The beamline infrastructure allows easy accommodation of large user provided equipment, such as an in-situ friction stir welding device which has been built at Helmholtz-Zentrum Hereon.
The HEMS beamline
3) Experiments targeting the industrial user community are based on well established techniques with standardised evaluation, allowing "full service" measurements. Environments for strain mapping on large structural components up to 1 t will be provided as well as automated investigations of large sample numbers, e.g. tomography and texture determination.
The beamline (P07 in sector 5 of the PETRA III Max von Laue Hall), consists of an undulator source, the main optics hutch OH1, an in-house test facility EH1 (Hereon) and three independent experimental hutches EH2 (DESY), EH3 (Hereon) and EH4 (Hereon) working alternatively, plus additional focussing optics hutches OH2 (DESY) and OH3 (Hereon) with set-up and storage space for long-term experiments.
The experimental hutches EH2 and EH3 have been available for reviewed user experiments since 2011. EH4 with its micro-tomography set-up was commissioned in 2012 (absorption) and 2013 (phase contrast), and its mapper set-up in the second half of 2013. The Test Facility EH1 is not available for external users.