Recoil-Ion Momentum Distributions for Single and Double Ionization of Helium in Strong Laser Fields

Weber, Thorsten; Weckenbrock, M.; Staudte, A.; Spielberger, L.; Jagutzki, O.; Mergel, V.; Afaneh, F.; Urbasch, G.; Vollmer, Martin K.; Gießen, Harald; Dørner, R.

doi:10.1103/physrevlett.84.443

Cited by 300 publications

(90 citation statements)

References 23 publications

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“…Similar data have been published for He by Weber et al (2000) and Ar by Weber et al (2000a) and Feuerstein et al (2001). Note, in disagreement with Figures 15,16 , the momentum distribution for single ionisation displays a maximum at zero momentum.…”

Section: Double Ionisation: Non-sequential and Sequentialsupporting

confidence: 77%

“…This structure automatically ruled out "shake-off" (Fittinghoff et al 1992) or "collective tunnelling" (Eichmann et al 2000) as dominant NS double ionisation mechanisms terminating a ten years discussion. At the same time, the peaks were found to be compatible with the "antenna" (Kuchiev 1987) or the "recollision" mechanism (Corkum 1993) as was first shown within classical considerations Moshammer et al 2000;Weber et al 2000). Subsequently, a variety of theoretical predictions (see the detailed discussion and references in Dörner et al (2002)) based on S-matrix theory, on the numerical solution of the time dependent Schrödinger equation (TDSE) as well as on the classical or semi-classical approximations essentially established the double peakstructure and recollision as the dominant NS double ionisation mechanism (see also earlier measurements with circularly polarized light by Fittinghoff et al (1994) and Dietrich et al (1994)).…”

Section: Double Ionisation: Non-sequential and Sequentialsupporting

confidence: 57%

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Recoil-ion and electron momentum spectroscopy: reaction-microscopes

et al. 2003

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Recoil-ion and electron momentum spectroscopy is a rapidly developing technique that allows one to measure the vector momenta of several ions and electrons resulting from atomic or molecular fragmentation. In a unique combination, large solid angles close to π Microccopes -the "bubble chambers of atomic physics" -mark the decisive step forward to investigate many-particle quantum-dynamics occurring when atomic and molecular systems or even surfaces and solids are exposed to time-dependent external electromagnetic fields.The present review concentrates on just these latest technical developments and on at least four new classes of fragmentation experiments that have emerged within about the last five years. First, multi-dimensional images in momentum space brought unprecedented information on the dynamics of single-photon induced fragmentation of fixed-in-space molecules and on their structure. Second, a break-through in the investigation of highintensity short-pulse laser induced fragmentation of atoms and molecules has been achieved by using Reaction Microccopes. Third, for electron and ion-impact, the investigation of twoelectron reactions has matured to a state such that first fully differential cross sections (FDCS) are reported. Forth, comprehensive sets of FDCS for single ionisation of atoms by ion-impact, the most basic atomic fragmentation reaction, brought new insight, a couple of surprises and unexpected challenges to theory at keV to GeV collision energies. In addition, a brief summary on the kinematics is provided at the beginning. Finally, the rich future potential of the method is shortly envisaged.2

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Section: Double Ionisation: Non-sequential and Sequentialsupporting

confidence: 77%

Section: Double Ionisation: Non-sequential and Sequentialsupporting

confidence: 57%

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

et al. 2003

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“…The precise mechanism responsible for delayed double ionization, is still a subject of study from the theoretical and experimental points of view [9]. Experimentally, the signature of RESI can be found in momentum distributions: The two lateral peaks in the bimodal distribution are attributed to direct impact ionization whereas RESI contributes to the central part around zero ion momentum [4,5,[10][11][12]. It also turns out that direct impact ionization is expected to be triggered when the electric field is close to zero whereas RESI is expected when the electric field is maximum.…”

Section: Introductionmentioning

confidence: 99%

Delayed double ionization as a signature of Hamiltonian chaos

et al. 2012

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We analyze the dynamical processes behind delayed double ionization of atoms subjected to strong laser pulses. Using reduced models, we show that these processes are a signature of Hamiltonian chaos which results from the competition between the laser field and the Coulomb attraction to the nucleus. In particular, we exhibit the paramount role of the unstable manifold of selected periodic orbits which lead to a delay in these double ionizations. Among delayed double ionizations, we consider the case of "Recollision Excitation with Subsequent Ionization" (RESI) and, as a hallmark of this mechanism, we predict oscillations in the ratio of RESI to double ionization yields versus laser intensity. We discuss the significance of the dimensionality of the reduced models for the analysis of the dynamical processes behind delayed double ionization.

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“…The first is nonsequential double ionization, which can be observed for close-to-linearly polarized laser fields. In this process, a field-driven recollision of a tunnel ionizing electron is responsible for the knockout of the second electron [2][3][4]. This process can be efficiently controlled by manipulating the shape of a few-cycle laser field, using, e.g., the duration or carrier-envelope phase (CEP) of the pulse [5].…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the sequential-double-ionization dynamics of helium in different few-cycle-laser-field shapes

et al. 2017

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We investigate sequential double ionization of helium by intense near-circularly polarized few-cycle laser pulses using a semiclassical ionization model with two independent electrons. Simulated He (2016)]. We study the influence of a number of pulse parameters such as peak intensity, carrier-envelope phase, pulse duration, and second-and third-order spectral phase on the shape of the ion momentum distributions. Good agreement is found in the main features of these distributions and of their dependence on the laser pulse duration, peak intensity, and carrier-envelope phase. Furthermore, we find that for explaining certain fine-scale features observed in the experiments, it becomes important to consider subtle timing variations in the two-electron emissions introduced by small values of chirp. This result highlights the possibility of measuring and controlling multielectron dynamics on the attosecond time scale by fine tuning the field evolution of intense close-to-single-cycle laser pulses.

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Recoil-Ion Momentum Distributions for Single and Double Ionization of Helium in Strong Laser Fields

Cited by 300 publications

References 23 publications

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Recoil-ion and electron momentum spectroscopy: reaction-microscopes

Delayed double ionization as a signature of Hamiltonian chaos

Numerical investigation of the sequential-double-ionization dynamics of helium in different few-cycle-laser-field shapes

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