Publications (42)
Scattering of twisted relativistic electrons by atoms
V. Serbo, I. P. Ivanov, S. Fritzsche +2
The Mott scattering of high-energetic twisted electrons by atoms is investigated within the framework of the first Born approximation and Dirac's relativistic equation. Special emp…
Do we know eventually p(e)?
B. Kampfer, M. Bluhm, H. Schade +2
A quasi-particle model is employed to derive from available lattice QCD calculations an equation of state useable in hydrodynamical simulations of the expansion stage of strongly i…
Beam-Shape Effects in Nonlinear Compton and Thomson Scattering
T. Heinzl, D. Seipt, B. Kampfer
We discuss intensity effects in collisions between beams of optical photons from a high-power laser and relativistic electrons. Our main focus are the modifications of the emission…
Non-Linear Compton Scattering of Ultrashort and Ultraintense Laser Pulses
D. Seipt, B. Kampfer
The scattering of temporally shaped intense laser pulses off electrons is discussed by means of manifestly covariant quantum electrodynamics. We employ a framework based on Volkov…
A Family of Equations of State Based on Lattice QCD: Impact on Flow in Ultrarelativistic Heavy-Ion Collisions
M. Bluhm, B. Kampfer, R. Schulze +2
We construct a family of equations of state within a quasiparticle model by relating pressure, energy density, baryon density and susceptibilities adjusted to first-principles latt…
Advances in QED with intense background fields
A. Fedotov, A. Ilderton, F. Karbstein +4
Upcoming and planned experiments combining increasingly intense lasers and energetic particle beams will access new regimes of nonlinear, relativistic, quantum effects. This improv…
An extended locally constant field approximation for nonlinear Compton scattering
A. Ilderton, B. King, D. Seipt
The locally constant field approximation (LCFA) has to date underpinned the numerical simulation of quantum processes in laser-plasma physics and astrophysics, but its validity has…
Caustic structures in the spectrum of x-ray Compton scattering off electrons driven by a short intense laser pulse
D. Seipt, A. Surzhykov, S. Fritzsche +1
We study the Compton scattering of x-rays off electrons that are driven by a relativistically intense short optical laser pulse. The frequency spectrum of the laser-assisted Compto…
A Fully Spin and Polarization Resolved Strong Field QED Algorithm for Particle-in-Cell Codes
Q. Qian, D. Seipt, M. Vranic +3
Modern ultra-intense laser facilities can generate electromagnetic fields strong enough to accelerate particles to near-light speeds over micron-scale distances and also approach t…
Spin polarization of electrons by ultraintense lasers
D. Del Sorbo, D. Seipt, T. G. Blackburn +4
In a strong magnetic field, ultra-relativistic electrons or positrons undergo spin flip transitions as they radiate, preferentially spin polarizing in one direction -- the Sokolov-…
Two-color above threshold ionization of atoms and ions in XUV Bessel beams and combined with intense laser light
D. Seipt, R. A. Müller, A. Surzhykov +1
The two-color above-threshold ionization (ATI) of atoms and ions is investigated for a vortex Bessel beam in the presence of a strong near-infrared (NIR) light field. While the pho…
Spectral caustics in laser assisted Breit-Wheeler process
T. Nousch, D. Seipt, B. Kämpfer +1
Electron-positron pair production by the Breit-Wheeler process embedded in a strong laser pulse is analyzed. The transverse momentum spectrum displays prominent peaks which are int…
Benchmarking semiclassical approaches to strong-field QED: nonlinear Compton scattering in intense laser pulses
T. G. Blackburn, D. Seipt, S. S. Bulanov +1
The recoil associated with photon emission is key to the dynamics of ultrarelativistic electrons in strong electromagnetic fields, as are found in high-intensity laser-matter inter…
Laser assisted Compton scattering of X-ray photons
D. Seipt, B. Kampfer
The Compton scattering of X-ray photons, assisted by a short intense optical laser pulse, is discussed. The differential scattering cross section reveals the interesting feature th…
Letter of Intent: Towards a Vacuum Birefringence Experiment at the Helmholtz International Beamline for Extreme Fields
N. Ahmadiniaz, C. Bähtz, A. Benediktovitch +49
Quantum field theory predicts a nonlinear response of the vacuum to strong electromagnetic fields of macroscopic extent. This fundamental tenet has remained experimentally challeng…
Quark mass dependence of thermal excitations in QCD in one-loop approximation
D. Seipt, M. Bluhm, B. Kampfer
A comprehensive determination of the quark mass dependence in the dispersion relations of thermal excitations of gluons and quarks in non-Abelian gauge theory (QCD) is presented fo…
Input to the ESPPU: The LUXE Experiment
H. Abramowicz, M. Almanza Soto, M. Altarelli +130
This document presents an overview of LUXE (Laser Und XFEL Experiment), an experiment that will combine the high-quality and high-energy electron beam of the European XFEL with a h…
Radiation beaming in the quantum regime
T. G. Blackburn, D. Seipt, S. S. Bulanov +1
Classical theories of radiation reaction predict that the electron motion is confined to the plane defined by the electron's instantaneous momentum and the force exerted by the ext…
Technical Design Report for the LUXE Experiment
H. Abramowicz, M. Almanza Soto, M. Altarelli +131
This Technical Design Report presents a detailed description of all aspects of the LUXE (Laser Und XFEL Experiment), an experiment that will combine the high-quality and high-energ…
All-optical source size and emittance measurements of laser-accelerated electron beams
F. C. Salgado, A. Kozan, D. Seipt +8
Novel schemes for generating ultra-low emittance electron beams have been developed in past years and promise compact particle sources with excellent beam quality suitable for futu…
QCD equation of state: Physical quark masses and asymptotic temperatures
M. Bluhm, B. Kampfer, R. Schulze +1
Within a phenomenological quasiparticle model, the quark mass and temperature dependence of the QCD equation of state is discussed and compared with lattice QCD results. Different…
Two-photon Compton process in pulsed intense laser fields
D. Seipt, B. Kampfer
Based on strong-field QED in the Furry picture we use the Dirac-Volkov propagator to derive a compact expression for the differential emission probability of the two-photon Compton…
Elastic scattering of vortex electrons provides direct access to the Coulomb phase
I. P. Ivanov, D. Seipt, A. Surzhykov +1
Vortex electron beams are freely propagating electron waves carrying adjustable orbital angular momentum with respect to the propagation direction. Such beams were experimentally r…
Structured x-ray beams from twisted electrons by inverse Compton scattering of laser light
D. Seipt, A. Surzhykov, S. Fritzsche
The inverse Compton scattering of laser light on high-energetic twisted electrons is investigated with the aim to construct spatially structured x-ray beams. In particular, we anal…
Relativistic Plasma Physics in Supercritical Fields
P. Zhang, S. S. Bulanov, D. Seipt +2
Since the invention of chirped pulse amplification, which was recognized by a Nobel prize in physics in 2018, there has been a continuing increase in available laser intensity. Com…
Depletion of intense fields
D. Seipt, T. Heinzl, M. Marklund +1
The interaction of charged particles and photons with intense electromagnetic fields gives rise to multi-photon Compton and Breit-Wheeler processes. These are usually described in…
A Frenet-Serret Interpretation of Particle Dynamics in High-Intensity Laser Fields
D. Seipt, A. G. R. Thomas
In this paper we discuss the dynamics of charged particles in high-intensity laser fields in the context of the Frenet-Serret formalism, which describes the intrinsic geometry of p…
QCD matter within a quasi-particle model and the critical end point
B. Kampfer, M. Bluhm, R. Schulze +2
We compare our quasi-particle model with recent lattice QCD results for the equation of state at finite temperature and baryo-chemical potential. The inclusion of the QCD critical…
Bright polarised x-ray flashes from dense plasmas
Q. Qian, C. P. Ridgers, S. V. Bulanov +5
Creating a plasma dominated by strong-field QED (SFQED) effects is a major goal of new multi-PW laser facilities. This is motivated by the fact that the fundamental dynamics of suc…
Compton scattering of twisted light: angular distribution and polarization of scattered photons
S. Stock, A. Surzhykov, S. Fritzsche +1
Compton scattering of twisted photons is investigated within a non-relativistic framework using first-order perturbation theory. We formulate the problem in the density matrix theo…
Input to the European Strategy for Particle Physics: Strong-Field Quantum Electrodynamics
G. Sarri, B. King, T. Blackburn +21
This document sets out the intention of the strong-field QED community to carry out, both experimentally and numerically, high-statistics parametric studies of quantum electrodynam…
Theory of Radiative Electron Polarization in Strong Laser Fields
D. Seipt, D. Del Sorbo, C. P. Ridgers +1
Radiative polarization of electrons and positrons through the Sokolov-Ternov effect is important for applications in high-energy physics. Radiative spin-polarization is a manifesta…
Non-linear Compton scattering of ultrahigh-intensity laser pulses
D. Seipt, B. Kampfer
We present results for the photon spectrum emitted in non-linear Compton scattering of pulsed ultra-strong laser fields off relativistic electrons for intensities up to $a_0\gtrsim…
Limitations of emittance and source size measurement of laser-accelerated electron beams using the pepper-pot mask method
F. C. Salgado, A. Kozan, D. Seipt +8
The pepper-pot method is a widely used technique, originally proposed for measuring the emittance of space-charge-dominated electron beams from radio-frequency photoinjectors. With…
Polarization dependent beam pointing jitter in laser wake field accelerators
A. Seidel, B. Lei, C. Zepter +4
We present experimental results, which show a laser polarization dependent contribution to electron beam pointing jitter in laser wakefield accelerators (LWFA). We develop a theore…
Spin and polarisation dependent LCFA rates for nonlinear Compton and Breit-Wheeler processes
D. Seipt, B. King
In this paper we derive and discuss the completely spin- and photon-polarisation dependent probability rates for nonlinear Compton scattering and nonlinear Breit-Wheeler pair produ…
Asymmetries of azimuthal photon distributions in non-linear Compton scattering in ultra-short intense laser pulses
D. Seipt, B. Kampfer
Non-linear Compton scattering in ultra-short intense laser pulses is discussed with the focus on angular distributions of the emitted photon energy. This is an observable which is…
Subthreshold pair production in short laser pulses
T. Nousch, D. Seipt, B. Kampfer +1
The pair production by a probe photon traversing a linearly polarized laser pulse is treated as generalized nonlinear Breit-Wheeler process. For short laser pulses with ve…
Double-slit experiment in momentum space
I. P. Ivanov, D. Seipt, A. Surzhykov +1
Young's classic double-slit experiment demonstrates the reality of interference when waves and particles travel simultaneously along two different spatial paths. Here, we propose a…
Narrowband inverse Compton scattering x-ray sources at high laser intensities
D. Seipt, S. G. Rykovanov, A. Surzhykov +1
Narrowband x- and gamma-ray sources based on the inverse Compton scattering of laser pulses suffer from a limitation of the allowed laser intensity due to the onset of nonlinear ef…
Towards high photon density for Compton Scattering by spectral chirp
M. A. Valialshchikov, D. Seipt, V. Yu. Kharin +1
Scattering of intense laser pulses on high-energy electron beams allows one to produce a large number of X and gamma rays. For temporally pulsed lasers the resulting spectra is bro…
Laser assisted Breit-Wheeler and Schwinger processes
T. Nousch, A. Otto, D. Seipt +5
The assistance of an intense optical laser pulse on electron-positron pair production by the Breit-Wheeler and Schwinger processes in XFEL fields is analyzed. The impact of a laser…