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Title: Probing ultra-fast processes with high dynamic range at 4th-generation light sources: Arrival time and intensity binning at unprecedented repetition rates

Journal Article · · Structural Dynamics
DOI:https://doi.org/10.1063/1.4978042· OSTI ID:1368582
 [1];  [1];  [2];  [3];  [2];  [4];  [3];  [1]
  1. Helmholz Zentrum Dresden Rossendorf, Dresden (Germany)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  3. Fritz-Haber-Institut der Max Planck Gesellschaft, Berlin (Germany)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)

Here, understanding dynamics on ultrafast timescales enables unique and new insights into important processes in the materials and life sciences. In this respect, the fundamental pump-probe approach based on ultra-short photon pulses aims at the creation of stroboscopic movies. Performing such experiments at one of the many recently established accelerator-based 4th-generation light sources such as free-electron lasers or superradiant THz sources allows an enormous widening of the accessible parameter space for the excitation and/or probing light pulses. Compared to table-top devices, critical issues of this type of experiment are fluctuations of the timing between the accelerator and external laser systems and intensity instabilities of the accelerator-based photon sources. Existing solutions have so far been only demonstrated at low repetition rates and/or achieved a limited dynamic range in comparison to table-top experiments, while the 4th generation of accelerator-based light sources is based on superconducting radio-frequency technology, which enables operation at MHz or even GHz repetition rates. In this article, we present the successful demonstration of ultra-fast accelerator-laser pump-probe experiments performed at an unprecedentedly high repetition rate in the few-hundred-kHz regime and with a currently achievable optimal time resolution of 13 fs (rms). Our scheme, based on the pulse-resolved detection of multiple beam parameters relevant for the experiment, allows us to achieve an excellent sensitivity in real-world ultra-fast experiments, as demonstrated for the example of THz-field-driven coherent spin precession.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1368582
Journal Information:
Structural Dynamics, Vol. 4, Issue 2; ISSN 2329-7778
Publisher:
American Crystallographic Association/AIPCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

References (19)

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  • Wesch, Stephan; Schmidt, Bernhard; Behrens, Christopher
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journal February 2011
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Cited By (10)

A THz Spectroscopy System Based on Coherent Radiation from Ultrashort Electron Bunches journal May 2018
Extremely efficient terahertz high-harmonic generation in graphene by hot Dirac fermions journal September 2018
Selective THz control of magnetic order: new opportunities from superradiant undulator sources journal February 2018
Compact and powerful THz source investigation on laser plasma wakefield injector and dielectric lined structure journal January 2020
On-chip THz spectrometer for bunch compression fingerprinting at fourth-generation light sources journal August 2018
Pulse- and field-resolved THz-diagnostics at 4 t h generation lightsources journal January 2019
Real-time observation of interfering crystal electrons in high-harmonic generation journal July 2015
Selective THz control of magnetic order: new opportunities from superradiant undulator sources text January 2018
Compact and powerful THz source investigation on laser plasma wakefield injector and dielectric lined structure text January 2020
Photon diagnostics at the FLASH THz beamline text January 2019

Figures / Tables (4)


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