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Simulation of FEL pulse length calculation with THz streaking method
I Gorgisyan1, R Ischebeck1, E Prat1
1Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
Journal of Synchrotron Radiation
|May 4, 2016
Summary
Accurate measurement of X-ray free-electron laser (FEL) pulses is crucial. Simulations show a THz streak camera can precisely measure FEL pulse lengths with femtosecond accuracy, benefiting machine operators and experimental users.
Area of Science:
- Physics
- X-ray Science
- Particle Accelerators
Background:
- Accurate photon diagnostics are essential for free-electron laser (FEL) facilities.
- Measuring X-ray pulse length is vital for machine operation and pump-probe experiments.
Purpose of the Study:
- To simulate and validate the performance of a THz streak camera for measuring FEL X-ray pulse lengths.
- To assess the accuracy and precision of the THz streak camera method.
Main Methods:
- Simulated FEL pulses in hard and soft X-ray regions.
- Recreated photoelectron energy spectra and streaked them with a single-cycle THz pulse.
- Calculated pulse lengths from streaked spectra using the THz streak camera retrieval procedure.
Main Results:
- The THz streak camera method was validated for accuracy and precision.
- Simulations demonstrated the capability to measure FEL pulses with approximately femtosecond accuracy and precision.
Conclusions:
- The THz streak camera is a promising diagnostic tool for FEL facilities.
- This simulation validates the THz streak camera's potential for precise X-ray pulse length measurements.
