Radiation for laser-driven rescattering near the ultimate high-energy cutoff: The single-atom response and bremsstrahlung limit

Jones, E. C.; Germain, Zach; Niessner, Jakob; Milliken, David; Scilla, Joey; Kelley, L. A.; MacDonald, J.; Walker, Barry

doi:10.1103/physreva.103.023113

Cited by 3 publications

(3 citation statements)

References 42 publications

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“…classical, numerical relativistic classical scattering, and relativistic quantum. For brevity, we will refer the reader to [7] for the full derivations and focus here on two essential findings.…”

Section: Ultimate Limit Of Rescattering Bremsstrahlung High Harmonic ...mentioning

confidence: 99%

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Ionization Dynamics for Atomic and Molecular Ions in Relativistic, Ultrastrong Laser Fields

Walker,

Jones,

Andreula

et al. 2023

J. Phys.: Conf. Ser.

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The discovery of laser-driven rescattering and high harmonic radiation out to a maximum photon energy of 3.17 times the ponderomotive energy (Up ) laid the groundwork for attosecond pulse generation and coherent X-rays. As the laser field drives the interaction to higher energies, relativity and the Lorentz force from the laser magnetic field enter into the dynamics. We present the results of recent studies of laser rescattering, including these effects, to give a quantitative description of rescattering dynamics in the high-energy limit, ie, recollision energies of order 1,000 hartree (27 keV). The processes investigated include inner K- and L-shell excitation and the ultimate limit of high harmonic generation via rescattering bremsstrahlung. The results indicate the path to the frontier area of x-ray strong field processes.

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Section: Ultimate Limit Of Rescattering Bremsstrahlung High Harmonic ...mentioning

confidence: 99%

“…Recently, an ultimate energy limit of rescattering [5] was discovered. This energy maximum for laser-driven rescattering is approximately one-thousand Hartree (27 keV), which means laser-driven rescattering can excite atomic systems across the periodic table from hydrogen to uranium [6,7].…”

Section: Introductionmentioning

confidence: 99%

Ionization Dynamics for Atomic and Molecular Ions in Relativistic, Ultrastrong Laser Fields

Walker,

Jones,

Andreula

et al. 2023

J. Phys.: Conf. Ser.

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“…Interesting dynamical properties arise due to the interplay between Coulomb effects of the atomic core and the nondipole effects [4][5][6][20][21][22][23][24][25][26]. The nondipole theory has been developed for the interpretation of experimental results, including the strong field approximation (SFA) [14,18,19,[27][28][29][30][31][32][33][34][35][36][37], the numerical solution of the timedependent Schrödinger equation (TDSE) [30,38,39], as well as the classical trajectory Monte Carlo (CTMC) simulations [12,[40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Relativistic analytical R-matrix (ARM) theory for strong-field ionization

Klaiber¹,

Hatsagortsyan²,

Keitel³

2023

Preprint

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The analytical R-matrix (ARM) theory has been known for an efficient description of the Coulomb effects of the atomic core in strong-field ionization in the nonrelativistic regime. We generalize the ARM theory into the relativistic domain aiming at the application to strong-field ionization of highly-charged ions in ultrastrong laser fields. Comparison with the relativistic Coulomb-corrected strong field approximations (SFA) is provided, highlighting the advantages and disadvantages. The weakly relativistic asymptotics and its accordance with the nondipole Coulomb-corrected SFA are examined. As an example of a physical application of the relativistic ARM, the Coulomb enhancement of tunneling ionization probability for highly-charged ions at the cutoff of the direct channel is discussed.

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