Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser

We experimentally demonstrate a single-shot arrival time monitor for short picosecond infrared free-electron laser (IR FEL) pulses based on balanced optical cross-correlation with a synchronized fs table-top laser. Employing this timing tool at the Fritz Haber Institute IR FEL, we observe a shot-to-...

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Main Authors: R. Kiessling, W. B. Colson, S. Gewinner, W. Schöllkopf, M. Wolf, A. Paarmann
Format: Article
Language:English
Published: American Physical Society 2018-08-01
Series:Physical Review Accelerators and Beams
Online Access:http://doi.org/10.1103/PhysRevAccelBeams.21.080702
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spelling doaj-3c6f37c819b444b58dcb47175885a3202020-11-24T21:32:23ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882018-08-0121808070210.1103/PhysRevAccelBeams.21.080702Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laserR. KiesslingW. B. ColsonS. GewinnerW. SchöllkopfM. WolfA. PaarmannWe experimentally demonstrate a single-shot arrival time monitor for short picosecond infrared free-electron laser (IR FEL) pulses based on balanced optical cross-correlation with a synchronized fs table-top laser. Employing this timing tool at the Fritz Haber Institute IR FEL, we observe a shot-to-shot timing jitter of only 100 fs and minute-scale timing drifts of a few picoseconds, the latter being strictly correlated with the electron beam energy of the accelerator. We acquire sum-frequency cross-correlation data with micropulse resolution, providing full access to the IR FEL pulse shape evolution within the macropulse. These measurements provide unprecedented insights into the occurrence of limit-cycle oscillations of the FEL intensity as a consequence of subpulse formation. Our experimental results are complemented by four-dimensional simulations of the nonlinear pulse dynamics in a low-gain FEL oscillator based on Maxwell-Lorentz theory.http://doi.org/10.1103/PhysRevAccelBeams.21.080702
collection DOAJ
language English
format Article
sources DOAJ
author R. Kiessling
W. B. Colson
S. Gewinner
W. Schöllkopf
M. Wolf
A. Paarmann
spellingShingle R. Kiessling
W. B. Colson
S. Gewinner
W. Schöllkopf
M. Wolf
A. Paarmann
Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser
Physical Review Accelerators and Beams
author_facet R. Kiessling
W. B. Colson
S. Gewinner
W. Schöllkopf
M. Wolf
A. Paarmann
author_sort R. Kiessling
title Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser
title_short Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser
title_full Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser
title_fullStr Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser
title_full_unstemmed Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser
title_sort femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser
publisher American Physical Society
series Physical Review Accelerators and Beams
issn 2469-9888
publishDate 2018-08-01
description We experimentally demonstrate a single-shot arrival time monitor for short picosecond infrared free-electron laser (IR FEL) pulses based on balanced optical cross-correlation with a synchronized fs table-top laser. Employing this timing tool at the Fritz Haber Institute IR FEL, we observe a shot-to-shot timing jitter of only 100 fs and minute-scale timing drifts of a few picoseconds, the latter being strictly correlated with the electron beam energy of the accelerator. We acquire sum-frequency cross-correlation data with micropulse resolution, providing full access to the IR FEL pulse shape evolution within the macropulse. These measurements provide unprecedented insights into the occurrence of limit-cycle oscillations of the FEL intensity as a consequence of subpulse formation. Our experimental results are complemented by four-dimensional simulations of the nonlinear pulse dynamics in a low-gain FEL oscillator based on Maxwell-Lorentz theory.
url http://doi.org/10.1103/PhysRevAccelBeams.21.080702
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