Subnanosecond-Resolved X-ray Diffraction at the SPring-8 High Flux Beamline BL40XU

Journal Article · Wed May 12 00:00:00 EDT 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1758059· OSTI ID:20652887

Adachi, Shin-ichi; Ishikawa, Tetsuya ^[1]; Inoue, Katsuaki; Oka, Toshihiko; Yagi, Naoto ^[2]; Tanaka, Yoshihito; Shiro, Yoshitsugu ^[1]

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1. SPring-8/RIKEN, Mikazuki, Hyogo 679-5148 (Japan)
2. SPring-8/JASRI, Mikazuki, Hyogo 679-5198 (Japan)

We present subnanosecond-resolved X-ray diffraction experiments at the SPring-8 high flux beamline BL40XU by use of time structure of synchrotron radiation. A phase-locked mechanical chopper (x-ray pulse selector), which is made by Forschungszentrum Juelich, has minimum opening time of 400 nanoseconds and generates single-bunch x-ray pulse trains with variable intervals of 1-2 millisecond (0.5-1 kHz) depending on the rotation speed and with the x-ray pulse duration of {approx} 30 picoseconds from the hybrid bunch mode (D-mode) of the SPring-8 ring operation. The interval of pulse trains is further expanded to more than 1 second by another slower shutter, if necessary. The pulse train is applicable to time-resolved diffraction experiments with both monochromatic and pink beams. An observed Laue data set from lysozyme crystal showed sufficient quality to refine the protein structure at 1.9 A resolution. A 10-nanosecond pulse from a Nd:YAG laser initiating photoreaction in a crystal can be synchronized with the X-ray pulse. Installation of a mode-locked Ti:sapphire laser/regenerative amplifier system which has a pulse duration of {approx} 2 picoseconds for further pump-probe experiments is also planed.

• OSTI ID: 20652887
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 705; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLIFIERS
BEAM BUNCHING
CRYSTALS
ELECTRON DENSITY
FORSCHUNGSZENTRUM JUELICH
HZ RANGE
LYSOZYME
MONOCHROMATIC RADIATION
NEODYMIUM LASERS
PROBES
PROTEIN STRUCTURE
PULSES
ROTATION
SAPPHIRE
SPRING-8 STORAGE RING
SYNCHROTRON RADIATION
TIME RESOLUTION
TIMING CIRCUITS
VELOCITY
X-RAY DIFFRACTION