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We explain the algorithm employed in SHADOW4 to generate bending magnet sources. We provide an overview of the fundamental equations used to calculate the spectral and angular distributions of synchrotron emission from bending magnets. We…

Accelerator Physics · Physics 2024-06-25 Manuel Sanchez del Rio , Howard A. Padmore

We analyse observational signatures of magnetic fields for simulations of a Milky-Way like disc with supernova-driven interstellar turbulence and self-consistent chemical processes. In particular, we post-process two simulations data sets…

Astrophysics of Galaxies · Physics 2022-03-29 Yoan Rappaz , Jennifer Schober , Philipp Girichidis

Understanding the role of magnetic fields in star-forming regions is of fundamental importance. In the near future, the exceptional sensitivity of SKA will offer a unique opportunity to evaluate the magnetic field strength in molecular…

High Energy Astrophysical Phenomena · Physics 2018-12-12 Marco Padovani , Daniele Galli

Exact solutions are given for the Maxwell equations driven by a gyrating ultrarelativistic electron inside a reflecting cylindrical boundary. The axis of the electrons's trajectory and the axis of the surrounding cylinder are supposed to…

Accelerator Physics · Physics 2011-02-01 Sandor Varro

Electron and positron beams in storage-rings self-polarize by emitting spin-flipping synchrotron radiation. If new ultralight particles couple to $e^\pm$, their emission in synchrotron-like radiation would modify the characteristic…

High Energy Physics - Phenomenology · Physics 2020-08-28 Iftah Galon

On the basis of the modern understanding of MHD turbulence, we propose a new way of using synchrotron radiation, namely using synchrotron intensity gradients for tracing astrophysical magnetic fields. We successfully test the new technique…

Astrophysics of Galaxies · Physics 2018-03-21 A. Lazarian , Ka Ho Yuen , Hyeseung Lee , Jungyeon Cho

We present the first time resolved OTR angular distribution measurements of an intense pulsed electron beam (1.7 kA, 60 ns). These initial experiments on the first axis of the Dual Axis Radiographic Hydro-Testing (DARHT) facility and…

Accelerator Physics · Physics 2007-05-23 C. Vermare , D. C. Moir , G. J. Seitz

The interpretation of Galactic synchrotron observations is complicated by the degeneracy between the strength of the magnetic field perpendicular to the line of sight (LOS), $B_\perp$, and the cosmic-ray electron (CRe) spectrum. Depending…

High Energy Astrophysical Phenomena · Physics 2021-07-28 Marco Padovani , Andrea Bracco , Vibor Jelić , Daniele Galli , Elena Bellomi

Synchrotron diffuse radiation (SDR) emission is one of the major Galactic components, in the 100 MHz up to 100 GHz frequency range. Its spectrum and sky map provide valuable measure of the galactic cosmic ray electrons (GCRE) in the…

High Energy Astrophysical Phenomena · Physics 2018-11-08 Giuseppe Di Bernardo , Dario Grasso , Carmelo Evoli , Daniele Gaggero

Modern synchrotron light sources are often characterized with high-brightness synchrotron radiation from insertion devices. Inevitably, insertion devices introduce nonlinear distortion to the beam motion. Symplectic tracking is crucial to…

Accelerator Physics · Physics 2022-10-12 Ji Li , Jörg Feikes , Tom Mertens , Edward Rial , Markus Ries , Andreas Schälicke , Luis Vera Ramirez

The initial demonstrations over the last several years of the use of optical diffraction radiation (ODR) as non-intercepting electron-beam-parameter monitors are reviewed. Developments in both far-field imaging and near-field imaging are…

Accelerator Physics · Physics 2012-07-20 Alex H. Lumpkin

Here we report our recent study on the spectral energy distribution (SED) of the high frequency BL Lac object Mrk 421 in different luminosity states. We used a full-fledged chi2-minimization procedure instead of more commonly used "eyeball"…

High Energy Astrophysical Phenomena · Physics 2011-11-02 Nijil Mankuzhiyil , Stefano Ansoldi , Massimo Persic , Fabrizio Tavechhio

In inhomogeneous optically thick synchrotron sources a substantial part of the electron population at low energies can be hidden by self-absorption and overpowered by high energy electrons in optically thin emission. These invisible…

Astrophysics · Physics 2009-11-07 Thomas Beckert , Heino Falcke

Resonant angle scanned x-ray photoelectron diffraction (RXPD) allows the determination of the atomic and magnetic structure of surfaces and interfaces. For the case of magnetized nickel the resonant L2 excitation with circularly polarized…

Other Condensed Matter · Physics 2015-05-27 M. Morscher , F. Nolting , T. Brugger , T. Greber

By means of particle-in-cell numerical simulations, we investigate the emission of high-energy photons in laser-plasma interactions under ultrahigh-intensity conditions relevant to multi-petawatt laser systems. We first examine the…

Plasma Physics · Physics 2021-01-04 Bertrand Martinez , Emmanuel d'Humières , Laurent Gremillet

The electromagnetic radiation of a rotating relativistic electron layers is studied numerically using particle-in-cell simulation. The results of the simulation confirm all relevant scaling properties predicted by theoretical models. These…

Astrophysics · Physics 2007-05-23 Bjoern S. Schmekel

High brightness electron accelerators, such as energy recovery linacs (ERL), often have complex particle distributions that can create difficulties in beam transport as well as matching to devices such as wigglers used to generate radiation…

The Emittace growth induced by Coherent Synchrotron Radiation(CSR) is an important issue when electron bunches with short bunch length and high peak current are transported in a bending magnet. In this paper, a single kick method is…

Accelerator Physics · Physics 2013-12-31 Cui Xiao-Hao , Jiao Yi , Xu Gang , Huang Xi-Yang

Although the surface of a magnetar is a source of bright thermal X-rays, its spectrum contains substantial non-thermal components. The X-ray emission is pulsed, with pulsed fractions that can be as high as ~ 70%. Several properties of…

Astrophysics · Physics 2011-02-11 Rodrigo Fernandez , Christopher Thompson

Synchrotron radiation facilities provide highly polarized X-ray beams across a wide energy range. However, the exact type and degree of polarization varies according to the beamline and experimental setup. To accurately determine the angle…

Instrumentation and Detectors · Physics 2024-05-31 L. Manzanillas , J. M. Ablett , M. Choukroun , F. J. Iguaz , J. P. Rueff