Solving the jitter problem in microwave compressed ultrafast electron diffraction instruments: Robust sub-50 fs cavity-laser phase stabilization
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- M. R. Otto
- Department of Physics, Center for the Physics of Materials, McGill University 1 , 3600 University Street, Montreal, Quebec H3A 2T8, Canada
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- L. P. René de Cotret
- Department of Physics, Center for the Physics of Materials, McGill University 1 , 3600 University Street, Montreal, Quebec H3A 2T8, Canada
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- M. J. Stern
- Department of Physics, Center for the Physics of Materials, McGill University 1 , 3600 University Street, Montreal, Quebec H3A 2T8, Canada
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- B. J. Siwick
- Department of Physics, Center for the Physics of Materials, McGill University 1 , 3600 University Street, Montreal, Quebec H3A 2T8, Canada
抄録
<jats:p>We demonstrate the compression of electron pulses in a high-brightness ultrafast electron diffraction instrument using phase-locked microwave signals directly generated from a mode-locked femtosecond oscillator. Additionally, a continuous-wave phase stabilization system that accurately corrects for phase fluctuations arising in the compression cavity from both power amplification and thermal drift induced detuning was designed and implemented. An improvement in the microwave timing stability from 100 fs to 5 fs RMS is measured electronically, and the long-term arrival time stability (>10 h) of the electron pulses improves to below our measurement resolution of 50 fs. These results demonstrate sub-relativistic ultrafast electron diffraction with compressed pulses that is no longer limited by laser-microwave synchronization.</jats:p>
収録刊行物
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- Structural Dynamics
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Structural Dynamics 4 (5), 051101-, 2017-08-02
AIP Publishing