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Open AccessArticle

Cross-Correlation of THz Pulses from the Electron Storage Ring BESSY II

1
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
2
Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Korea
3
Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
4
Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Roma, Italy
*
Author to whom correspondence should be addressed.
Condens. Matter 2020, 5(2), 24; https://doi.org/10.3390/condmat5020024
Received: 17 February 2020 / Revised: 24 March 2020 / Accepted: 25 March 2020 / Published: 27 March 2020
Coherent synchrotron radiation from an electron storage ring is observed in the THz spectral range when the bunch length is shortened down to the sub-mm-range. With increasing stored current, the bunch becomes longitudinally unstable and modulates the THz emission in the time domain. These micro-instabilities are investigated at the electron storage ring BESSY II by means of cross-correlation of the THz fields from successive bunches. The investigations allow deriving the longitudinal length scale of the micro bunch fluctuations and show that it grows faster than the current-dependent bunch length. Our findings will help to set the limits for the possible time resolution for pump-probe experiments achieved with coherent THz synchrotron radiation from a storage ring. View Full-Text
Keywords: THz; coherent synchrotron radiation; low alpha; cross-correlation; pump-probe THz; coherent synchrotron radiation; low alpha; cross-correlation; pump-probe
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Schade, U.; Kuske, P.; Lee, J.; Marchetti, B.; Ortolani, M. Cross-Correlation of THz Pulses from the Electron Storage Ring BESSY II. Condens. Matter 2020, 5, 24.

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