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Presently large efforts are conducted towards the development of highly brilliant gamma beams via Compton back scattering of photons from a high-brilliance electron beam, either on the basis of a normal-conducting electron linac or a…

Nuclear Experiment · Physics 2015-05-27 C. Hugenschmidt , K. Schreckenbach , D. Habs , P. G. Thirolf

This document describes the technical design concept of a compact high intensity, multi-GeV photon source. Capable of producing 10^12 equivalent photons per second this novel device will provide unprecedented access to physics processes…

Instrumentation and Detectors · Physics 2020-03-18 D. Day , P. Degtiarenko , S. Dobbs , R. Ent , D. J. Hamilton , T. Horn , D. Keller , C. Keppel , G. Niculescu , P. Reid , I. Strakovsky , B. Wojtsekhowski , J. Zhang

The observations of gamma-ray emission from pulsars with the Fermi-LAT detector and the detection of the Crab pulsar with the VERITAS array of Cherenkov telescopes at energies above 100 GeV make it unlikely that curvature radiation is the…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Maxim Lyutikov , Nepomuk Otte , Andrew McCann

The necessity for compact table-top x-ray sources with higher brightness, shorter wavelength and shorter pulse duration has led to the development of complementary sources based on laser-plasma accelerators, in contrast to conventional…

We present a new paradigm for computation of radiation spectra in the non-linear regime of operation of inverse Compton sources characterized by high laser intensities. The resulting simulations show an unprecedented level of agreement with…

We have detected significant X-ray emission from the direction of the young radio pulsar PSR J1105-6107 using the ASCA Observatory. The 11 sigma detection includes 460 background-subtracted source counts derived using data from all four…

Astrophysics · Physics 2009-10-30 E. V. Gotthelf , V. M. Kaspi

Inelastic X-ray scattering (IXS) is an important tool for studies of equilibrium dynamics in condensed matter. A new spectrometer recently proposed for ultra-high-resolution IXS (UHRIX) has achieved 0.6~meV and 0.25~nm$^{-1}$ spectral and…

Liquid-metal jet X-ray sources promise to deliver high photon fluxes, which are unprecedented for laboratory based X-ray sources, because the regenerating liquid-metal anode is less sensitive to damage caused by an increased electron beam…

Instrumentation and Detectors · Physics 2019-05-24 Malte Wansleben , Claudia Zech , Cornelia Streeck , Jan Weser , Christoph Genzel , Burkhard Beckhoff , Roland Mainz

We report on an XMM-Newton observation of the accreting millisecond pulsar, IGR J17511-3057. Pulsations at 244.8339512(1) Hz are observed with an RMS pulsed fraction of 14.4(3)%. A precise solution for the P_orb=12487.51(2)s binary system…

High Energy Astrophysical Phenomena · Physics 2015-05-19 A. Papitto , A. Riggio , T. Di Salvo , L. Burderi , A. D'Aì , R. Iaria , E. Bozzo , M. T. Menna

We study a broad-band X-ray observation by BeppoSAX of the broad-line radio galaxy 3C 120. The primary X-ray continuum is well described by a power law with the photon index of Gamma=1.85+-0.05 and a high-energy break or a cutoff. The…

Astrophysics · Physics 2009-10-31 A. A. Zdziarski , P. Grandi

We present a model for the broadband radio-to-$\gamma$-ray spectral energy distribution of the compact radio source, PKS 1718-649. Because of its young age (100 years) and proximity ($z=0.014$), PKS 1718-649 offers a unique opportunity to…

High Energy Astrophysical Phenomena · Physics 2023-01-19 Małgosia Sobolewska , Giulia Migliori , Luisa Ostorero , Aneta Siemiginowska , Łukasz Stawarz , Matteo Guainazzi , Martin Hardcastle

Unraveling and controlling chemical dynamics requires techniques to image structural changes of molecules with femtosecond temporal and picometer spatial resolution. Ultrashort-pulse x-ray free-electron lasers have significantly advanced…

This paper presents the design of a travelling wave RF photogun operating at the European X-band frequency of 11.994 GHz. The design is based on a CLIC prototype structure milled from copper halves and uses the unique gap introduced in the…

Accelerator Physics · Physics 2020-09-02 Thomas Geoffrey Lucas , Peter Mutsaers , Jom Luiten

Betatron X-ray radiation in laser-plasma accelerators is produced when electrons are accelerated and wiggled in the laser-wakefield cavity. This femtosecond source, producing intense X-ray beams in the multi kiloelectronvolt range has been…

For the interpretation of X-ray radiation from kiloparsec jets of quasars, the inverse Compton scattering of the cosmic microwave background has been widely used for almost 20 years. A recent analysis of the Fermi-LAT observational data…

High Energy Astrophysical Phenomena · Physics 2020-12-10 M. S. Butuzova , A. B. Pushkarev , E. S. Shablovinskaya , S. V. Nazarov

A compact damping ring with limited circumference of about 160 m is proposed for producing kilowatt-level coherent EUV radiation. The electron bunch in the ring is modulated by a 257nm wavelength laser with the help of the angular…

We report on the discovery of a new pulsating X-ray source during Rossi X-ray Timing Explorer observations of a low galactic latitude field centered at RA (J2000) = 19 hr 05 m 43 s and Dec (J2000) = +08 deg 58 arcmin 48 arcsec. Significant…

Astrophysics · Physics 2009-10-30 D. Marsden , D. E. Gruber , W. A. Heindl , M. R. Pelling , R. E. Rothschild

In the field of beam physics, two frontier topics have taken center stage due to their potential to enable new approaches to discovery in a wide swath of science. These areas are: advanced, high gradient acceleration techniques, and x-ray…

The nature of ultraluminous X-ray sources (ULXs) -- off-nuclear extra-galactic sources with luminosity, assumed isotropic, $\gtrsim 10^{39}$ erg s$^{-1}$ -- is still debated. One possibility is that ULXs are stellar black holes accreting…

High Energy Astrophysical Phenomena · Physics 2017-05-31 Davide Fiacconi , Ciro Pinto , Dominic J. Walton , Andrew C. Fabian

Aims: The low persistent X-ray burster source SLX 1737-282 is classified as an ultra-compact binary candidate. We compare the data on SLX 1737-282 with the other similar objects and attempt to derive constraints on the physical processes…

Astrophysics · Physics 2009-11-13 M. Falanga , J. Chenevez , A. Cumming , E. Kuulkers , G. Trap , A. Goldwurm