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Synchrotron radiation from accelerated electrons above the photosphere of a relativistic ejecta is a natural candidate for the dominant process for the prompt GRB emission. There is however a tension between the predicted low-energy…

High Energy Astrophysical Phenomena · Physics 2025-01-29 Frédéric Daigne , Željka Bošnjak

We investigate the radiation from a charged particle rotating around a dielectric cylinder with a negative real part of dielectric permittivity. For the general case of frequency dispersion in dielectric permittivity, expressions are…

Relativistic electrons moving into a highly tangled magnetic field emit jitter radiation. We present a detailed computation of the jitter radiation spectrum, including self-absorption, for electrons inside Weibel-like shock generated…

Astrophysics · Physics 2009-11-13 Jared Workman , Brian Morsony , Davide Lazzati , Mikhail Medvedev

Analysis of the effects of decoherence on the radiative and squeezing properties of a coherently driven two-level atom trapped in a resonant cavity applying the corresponding master equation is presented. The atomic dynamics as well as the…

Quantum Physics · Physics 2009-11-13 Sintayehu Tesfa

We performed a time-resolved spectral analysis of 53 bright gamma-ray bursts (GRBs) observed by \textit{Fermi}/GBM. Our sample consists of 908 individual spectra extracted from the finest time slices in each GRB. We fitted them with the…

High Energy Astrophysical Phenomena · Physics 2022-03-02 Dao-Zhou Wang , Xiao-Hong Zhao , Zhao Zhang , Bin-Bin Zhang , Zhao-Yang Peng

Space charge is typically one of the performance limitations for the operation of high intensity and high brightness beams in circular accelerators. In the Proton Synchrotron (PS) at CERN, losses are observed for vertical tunes above…

We calculate equilibrium emittances and damping times due to the emission of synchrotron radiation for coupled storage ring lattices by evaluating the projections of the commonly used synchrotron radiation integrals onto the normal modes of…

Accelerator Physics · Physics 2022-05-24 Volker Ziemann , Andreas Streun

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

Galaxy clusters accrete mass through large scale, strong, structure-formation shocks. Such a virial shock is thought to deposit fractions $\xi_e$ and $\xi_B$ of the thermal energy in cosmic-ray electrons (CREs) and magnetic fields,…

High Energy Astrophysical Phenomena · Physics 2023-05-31 Kuan-Chou Hou , Gregg Hallinan , Uri Keshet

As a consequence of motions driven by external forces, self-fields originate within an electron bunch, which are different from the static case. In the case of magnetic external forces acting on an ultrarelativistic beam, the longitudinal…

Accelerator Physics · Physics 2007-05-23 G. Geloni , E. Saldin , E. Schneidmiller , M. Yurkov

We report preliminary results from a synchrotron radiation study of Te inclusions in a large volume single crystal CdZnTe (CZT) coplanar-grid detector. The experiment was carried out by probing individual inclusions with highly collimated…

Instrumentation and Detectors · Physics 2015-05-30 Conny C. T. Hansson , Alan Owens , Francesco Quarati , Alexander Kozorezov , Vladimir Gostilo , David Lumb

We performed an analysis of coherence properties of the 4-th generation high-energy storage rings with emittance values of 10 pmrad. It is presently expected that a storage ring with these low emittance values will reach diffraction limit…

Optics · Physics 2019-11-12 R. Khubbutdinov , A. P. Menushenkov , I. A. Vartanyants

In the aspect of longitudinal beam bunching, the bunching strength can be controlled by the RF cavity phase and voltage. However, these machine parameters are different from those that interact with the beam itself. In order to gain control…

Accelerator Physics · Physics 2023-06-16 K. Shih , I. Petrushina , V. N. Litvinenko , I. Pinayev , J. Ma , G. Wang , Y. Jing , Y. Wu

In the framework of the "LHC Injectors Upgrade" (LIU) project, the CERN Proton Synchrotron (PS) is being prepared as a pre-injector for the Large Hadron Collider at high luminosity (HL-LHC). RF systems at 20 MHz, 40 MHz and 80 MHz are…

Accelerator Physics · Physics 2019-10-16 Florian Bertin , Ylenia Brischetto , Heiko Damerau , Azeddine Jibar , Damien Perrelet

Coherent Synchrotron Radiation has been studied effectively using a 1-dimensional model for the charge distribution in the realm of small angle approximations and high energies. Here we use Jefimenko's form of Maxwell's equations, without…

Accelerator Physics · Physics 2009-03-12 Christopher Mayes , Georg Hoffstaetter

The class of Double-Double Radio Galaxies (DDRGs) relates to episodic jet outbursts. How various regions and components add to the total intensity in radio images is less well known. In this paper we synthesize synchrotron images for DDRGs…

High Energy Astrophysical Phenomena · Physics 2020-07-30 S. Walg , A. Achterberg , S. Markoff , R. Keppens , O. Porth

The basic mechanism responsible for radio emission in radio-loud active galactic nuclei (AGNs) is assumed to be synchrotron radiation. We suggest here that radio emission in radio-quiet objects is also due to synchrotron radiation of…

High Energy Astrophysical Phenomena · Physics 2015-05-20 W. Ishibashi , T. J. -L. Courvoisier

Relativistic electrons accelerated by both the first-order and the second-order Fermi accelerations in some synchrotron sources have a hybrid shape of thermal and nonthermal energy distribution. This particle acceleration result is…

High Energy Astrophysical Phenomena · Physics 2018-03-14 Jirong Mao , Jiancheng Wang

High peak current electron beams are essential for x-ray free-electron lasers (FELs), and generally realized through multi-stage compression with symmetric C-shape four-bend chicanes. However, the coherent synchrotron radiations (CSR),…

Accelerator Physics · Physics 2024-07-03 Fancong Zeng , Yi Jiao , Weihang Liu , Cheng-Ying Tsai

The coherent radiation of the electron beam with account of particle position correlations because of strong Coulomb interaction is considered. For the first time it is shown that the coherency of the radiation of the bunch with account of…

Accelerator Physics · Physics 2007-05-23 R. V. Tumanian , L. A. Gevorgian