MX2 Beamline
The specifications of the planned MX beamlines at PETRA-III will be largely governed by the challenges emerging from the research directions presented above. Biological crystallographic experiments require an intense and very stable X-ray beam tunable in energy with small, adjustable focus and low divergence. The end-station will be automated to a level that minimises (and eliminates wherever possible) the need for user intervention. The X-ray beam has to be conditioned by various sets of slits and attenuators and observed by a series of viewers and beam position monitors.
The MX2 Beamline is designed for applications to supramolecular structures and very small crystal volumes. It will utilise radiaiton of 2m-long section of canted insertion device from the last straight section (section 9) of the Petra III storage ring. The beamline will cover the photon energy range from c.a. 6 to 18 keV with the focus size smaller than 10x10 µm2 at the sample position and divergence <0.6 mrad.
In addition, "pink beam" experimental option (ΔE/E~1%) is planned for ultra-high flux (1015 photon/second) operation and ultra-fast data collection.
Contact
Gleb Bourenkov
Project Leader
Tel: +49 (0) 40 89902-216
E-mail: gleb@embl-hamburg.de
Proposed Experimental Capabilities
- Tunable beam size 1-100 μm
- MAD/ optimised SAD experiments in the range of 6-18 keV absorption edges form Mn-K to U- LIII
- Fluorescence scan possibilities for the same energy range
- SAD experiments on sulphur, phosphorous and iodine at lowest possible energy
- Maximum cell axis resolvable (subject to the beam size and crystal mosaicity): 700-1000 Å
- Typical exposure times: ~50 milliseconds/degree