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Software defined photon counting system for time resolved x-ray experiments.

Y Acremann1, V Chembrolu, J P Strachan

  • 1PULSE Center, Stanford Linear Accelerator Center, Menlo Park, California 94025, USA.

The Review of Scientific Instruments
|May 17, 2007
PubMed
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This study introduces a new photon counting system for time-resolved experiments. It enables efficient pump-probe studies at full synchrotron repetition rates, improving experimental throughput.

Area of Science:

  • X-ray science
  • Spectroscopy
  • Materials science

Background:

  • Synchrotron radiation enables time-resolved experiments with sub-100 ps resolution using pump-probe methods.
  • Sample relaxation times can necessitate lower pump pulse repetition rates than available synchrotron X-ray pulse rates.
  • Current methods using only the immediate X-ray pulse after the pump pulse are inefficient and require specialized synchrotron operations.

Purpose of the Study:

  • To develop a novel software-defined photon counting system for flexible pump-probe schemes.
  • To enable time-resolved experiments at the full repetition rate of synchrotron X-ray pulses.
  • To enhance experimental efficiency by simultaneously detecting sample responses at multiple time delays.

Main Methods:

  • Design and implementation of a software-defined photon counting system.

Related Experiment Videos

  • Utilizing a high number of photon counters for simultaneous data acquisition.
  • Application of the system to time-resolved scanning transmission X-ray microscopy.

    • Main Results:

    • The developed system allows for various pump-probe schemes at the full synchrotron repetition rate.
    • Simultaneous detection of sample responses at multiple time delays significantly improves experimental efficiency.
    • Successful application demonstrated in time-resolved scanning transmission X-ray microscopy.

    Conclusions:

    • The novel photon counting system offers a more efficient approach to time-resolved pump-probe experiments.
    • The technique is versatile and applicable to a broader range of scientific investigations beyond scanning transmission X-ray microscopy.