Pulse- and field-resolved THz-diagnostics at 4 generation lightsources.

Area of Science:

• Physics
• Ultrafast Science
• Accelerator Physics

Background:

• Modern accelerator-based light sources, like X-ray free electron lasers and superradiant THz facilities, are crucial for advanced pump-probe experiments.
• Precise characterization of light pulses is essential for achieving high sensitivity and temporal resolution in these experiments.

Purpose of the Study:

• To demonstrate the utility of pulse- and field-resolved detection for enhancing THz pump-femtosecond laser probe experiments.
• To improve the precision of experiments conducted at superradiant THz facilities and other 4th generation light sources.

Main Methods:

• Development and application of a diagnostic scheme for real-time, pulse-resolved detection of superradiant THz pulses.
• Utilizing correlations between amplitude and phase of emitted pulses from multiple THz sources.

Main Results:

• The diagnostic scheme provides real-time information on individual THz pulse properties from multiple sources.
• Achieved sub-femtosecond timing precision for pump-probe experiments.
• Established correlations between pulse amplitude and phase, offering insights into driving electron bunch properties.

Conclusions:

• Pulse- and field-resolved detection significantly improves the precision of THz pump-femtosecond laser probe experiments.
• This method offers robust sub-femtosecond timing and valuable insights into electron bunch dynamics.
• The developed diagnostic is broadly applicable to ultrafast diagnostics at 4th generation light sources.