Bunch fill pattern at BESSY monitored by time-correlated single photon counting

Holldack, K.; Hartrott, M. v.; Hoeft, Frank; Neitzke, Oliver; Bauch, Erik; Wahl, Michael

doi:10.1117/12.734226

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…This beam consists of individual packets, with a typical temporal width of few tens of ps in the laboratory system. 242 …”

Section: Experimental Methodsmentioning

confidence: 99%

“…They are determined by the electron or positron beam producing the radiation. This beam consists of individual packets, with a typical temporal width of few tens of ps in the laboratory system …”

Section: Experimental Methodsmentioning

confidence: 99%

“…This beam consists of individual packets, with a typical temporal width of few tens of ps in the laboratory system. 242 Although the intensity available at synchrotron radiation sources revolutionized X-ray physics, it is by far not sufficient to carry out multiphoton experiments. Research on ICD-like decays involving multiple excited states, such as collective ICD, 51 has mostly used sources of much higher peak intensity.…”

Section: Excitation Mechanismsmentioning

confidence: 99%

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Interatomic and Intermolecular Coulombic Decay

et al. 2020

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Interatomic or intermolecular Coulombic decay (ICD) is a nonlocal electronic decay mechanism occurring in weakly bound matter. In an ICD process, energy released by electronic relaxation of an excited atom or molecule leads to ionization of a neighboring one via Coulombic electron interactions. ICD has been predicted theoretically in the mid nineties of the last century, and its existence has been confirmed experimentally approximately ten years later. Since then, a number of fundamental and applied aspects have been studied in this quickly growing field of research. This review provides an introduction to ICD and draws the connection to related energy transfer and ionization processes. The theoretical approaches for the description of ICD as well as the experimental techniques developed and employed for its investigation are described. The existing body of literature on experimental and theoretical studies of ICD processes in different atomic and molecular systems is reviewed.

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“…This beam consists of individual packets, with a typical temporal width of few tens of ps in the laboratory system. 242 …”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Excitation Mechanismsmentioning

confidence: 99%

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Interatomic and Intermolecular Coulombic Decay

et al. 2020

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“…Under these conditions, synchrotron radiation is delivered in pulses of 20-30 ps length with a spacing of 2 ns [40]. A train of 350 electron bunches is followed by a dark gap of 100 ns length, in the middle of which a single electron bunch is injected, resulting in the so-called hybrid peak [41].…”

Section: B Data Acquisitionmentioning

confidence: 99%

Photoelectron–Auger electron coincidence spectroscopy of free molecules: New experiments

Ulrich

Barth

Lischke

et al. 2011

Journal of Electron Spectroscopy and Related Phenomena

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Photoelectron-Auger electron coincidence spectroscopy probes the dicationic states produced by Auger decay following the photoionization of core or inner valence levels in atoms, molecules or clusters. Moreover, the technique provides valuable insight into the dynamics of core hole decay. This paper serves the dual purpose of demonstrating the additional information obtained by this technique compared to Auger spectroscopy alone as well as of describing the new IPP/FHI apparatus at the BESSY II synchrotron radiation source. The distinguishing feature of the latter is the capability to record both the photoelectron and Auger electron with good energy and angle resolution, for which purpose a large hemispherical electrostatic analyser is combined with several linear time-of-flight spectrometers. New results are reported for the K-shell photoionization of oxygen (O 2 ) and the subsequent K-VV Auger decay. Calculations in the literature for non-coincident O 2 Auger spectra are found to be in moderately good agreement with the new data.

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Synchrotron-based ultrafast x-ray diffraction at high repetition rates

Navirian

Shayduk

Leitenberger

et al. 2012

Review of Scientific Instruments

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We present a setup for ultrafast x-ray diffraction (UXRD) based at the storage ring BESSY II, in particular, a pump laser that excites the sample using 250 fs laser-pulses at repetition rates ranging from 208 kHz to 1.25 MHz. We discuss issues connected to the high heat-load and spatio-temporal alignment strategies in the context of a UXRD experiment at high repetition rates. The spatial overlap between laser pump and x-ray probe pulse is obtained with 10 μm precision and transient lattice changes can be recorded with an accuracy of δa/a(0) = 10(-6). We also compare time-resolved x-ray diffraction signals from a laser excited LSMO/STO superlattice with phonon dynamics simulations. From the analysis we determine the x-ray pulse duration to 120 ps in standard operation mode and below 10 ps in low-α mode.

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Bunch fill pattern at BESSY monitored by time-correlated single photon counting

Cited by 6 publications

References 1 publication

Interatomic and Intermolecular Coulombic Decay

Interatomic and Intermolecular Coulombic Decay

Photoelectron–Auger electron coincidence spectroscopy of free molecules: New experiments

Synchrotron-based ultrafast x-ray diffraction at high repetition rates

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