Margaret Island Symposium 2022 on Vacuum Structure, Particles, and Plasmas

Session

Strong Fields

3

17 May 2022, 09:00

Conveners

Strong Fields

• András Patkós (Eötvös University)

Strong Fields

• Leonid Glozman (University of Graz)

Description

Physics of strong fields, including pair creation.

39. Strong Field Physics

Prof. Johann Rafelski (Department of Physics, University of Arizona)

17/05/2022, 09:00

Strong fields create strong acceleration and thus a strong radiation reaction (RR) force. We demonstrate within the Eliezer-Ford-O'Connell (EFO) RR model for many externally applied field configurations D,H a Lorentz-invariant upper bound to the acceleration of a particle. A limit to the strength of acceleration implies a limit to the strength of EM force fields E,B reminiscent of the...

40. Current conserving theory of collisional relativistic plasmas

Martin Formanek (ELI Beamlines )

17/05/2022, 09:40

There is a renewed interest in extending relativistic description of plasma response in external electromagnetic fields from Vlasov equation to a form including Boltzmann collision term [1–4]. In this work we incorporate the relaxation rate approximation of collisions [2] in a manifestly covariant way assuring explicitly current and energy-momentum conservation for two-component...

64. Dynamic Response of Viscous QGP to Strong Electromagnetic Fields

Christopher Grayson (Department of Physics, The University of Arizona)

17/05/2022, 10:00

We investigate the electromagnetic response of quark-gluon plasma starting from the Boltzmann
equation in the limit of linear response. We model the quark-gluon plasma as an infinite medium
of ultra-relativistic quarks and anti-quarks which collide with a momentum averaged damping rate
in the BGK approximation. This medium is then perturbed electromagnetically by colliding heavy
ions and...

56. Magnetic moment in quantum electrodynamics: Vacuum structure and particle production

Stefan Evans (Department of Physics, University of Arizona)

17/05/2022, 10:20

We study the QED effective action in strong electric fields. Employing the Weisskopf (1936) and
Nikishov (1969) summation methods, novel analytical properties of the QED strong field effective
action are discovered, inaccessible to Schwinger proper time method. Using these rediscovered
tools we incorporate anomalous magnetic moment as a correction to the Euler-Heisenberg, and
Sauter...

69. Multiphoton processes in the field of a ‘pedestal’

Dr Sándor Varró (Wigner RCP)

17/05/2022, 11:00

The high-intensity light pulses used in mutiphoton experiments come from amplifiers,
and these pulses contain quite strong (unwanted) ‘pre-pulses’, or ‘pedestals’. The main source of
the pedestal is said to be the amplified spontaneous emission (ASE) of the amplifying medium.
Since the photon statistics of the ASE is differe nt from that of the main pulse, the study of
multiphoton...

58. Investigating the properties of a plasma channel via Schlieren imaging and machine learning methods

Mr Mihály András Pocsai (Wigner RCP)

17/05/2022, 11:30

We investigate the usage of a Schlieren imaging setup to measure the geometrical dimensions of a plasma channel in atomic vapor. Near resonant probe light is used to image the plasma channel in a tenuous vapor and machine learning techniques are tested for extracting quantitative information
from the images. By building a database of simulated signals with a range of plasma parameters for...

77. New, Spherical Solutions of Non-Relativistic, Dissipative Hydrodynamics

Prof. Tamás Csörgő (Wigner RCP and EKE KRC, Budapest and Gyöngyös)

17/05/2022, 11:50

We present a new family of exact solutions of dissipative fireball hydrodynamics for arbitrary bulk and shear viscosities. The main property of these solutions is a spherically symmetric, Hubble flow field. The motivation of this paper is mostly academic: we apply non-relativistic kinematics for simplicity and clarity. In this limiting case, the theory is particularly clear: the...

51. Toward large THz fields at the European XFEL

Francois Lemery (XFEL), Oleksandr Borysov (DESY)

17/05/2022, 12:10

The European XFEL produces up to 20 GeV electron bunches with a repetition of up to 27 kHz to ultimately provide a large range of coherent X-rays to users with individual pulse energies on the order of 1 mJ. We discuss the development of a new experimental program, Superradiant THz radiation at the European XFEL (STERN), to produce large THz fields by passing the electron beam through...