Kilohertz Macromolecular Crystallography Using an EIGER Detector at Low X-ray Fluxes

Krishna P. Khakurel, Shirly Espinoza, Martin Savko, Vitaly Polovinkin, Jan Dohnalek, William Shepard, Angelina Angelova, Janos Hajdu, Jakob Andreasson, Borislav Angelov
2020 Crystals  
Time-resolved in-house macromolecular crystallography is primarily limited by the capabilities of the in-house X-ray sources. These sources can only provide a time-averaged structure of the macromolecules. A significant effort has been made in the development of in-house laser-driven ultrafast X-ray sources, with one of the goals as realizing the visualization of the structural dynamics of macromolecules at a very short timescale within the laboratory-scale infrastructure. Most of such in-house
more » ... ultrafast X-ray sources are operated at high repetition rates and usually deliver very low flux. Therefore, the necessity of a detector that can operate at the repetition rate of the laser and perform extremely well under low flux conditions is essential. Here, we present experimental results demonstrating the usability of the hybrid-pixel detectors, such as Eiger X 1M, and provide experimental proof that they can be successfully operated to collect macromolecular crystallographic data up to a detector frame rate of 3 kHz from synchrotron sources. Our results also show that the data reduction and structural analysis are successful at such high frame rates and fluxes as low as 108 photons/sec, which is comparable to the values expected from a typical laser-driven X-ray source.
doi:10.3390/cryst10121146 fatcat:h3zomr5d4nhrfaspfsw7fpreoi