Filters (3 )
Download Results
19 research outcomes, page 1 of 2
  • publication . Article . 2013
    Open Access English
    Authors:
    J.M. Dias; Gregor H Welsh; Matthias Hoek; David J Hamilton;
    Project: FCT | SFRH/BD/37838/2007 (SFRH/BD/37838/2007), EC | LASERLAB-EUROPE (284464), EC | EUCARD-2 (312453)

    Compton side-scattering has been used to simultaneously downshift the energy of keV to MeV energy range photons while attenuating their flux to enable single-shot, spectrally resolved, measurements of high flux X-ray sources to be undertaken. To demonstrate the techniqu...

  • publication . Conference object . Part of book or chapter of book . 2015
    Open Access
    Authors:
    Gregor H Welsh; Paul McKenna;
    Publisher: SPIE
    Project: EC | EUCARD-2 (312453), EC | LASERLAB-EUROPE (284464)

    X-ray phase contrast imaging (X-PCi) is a very promising method of dramatically enhancing the contrast of X-ray images of microscopic weakly absorbing objects and soft tissue, which may lead to significant advancement in medical imaging with high-resolution and low-dose...

  • publication . Article . 2014
    Open Access English
    Authors:
    Xiaolong Zhu;
    Publisher: ELSEVIER SCIENCE BV
    Project: EC | LASERLAB-EUROPE (284464), EC | EUCARD-2 (312453)

    The stability of accelerated electron beams produced by self injection of plasma electrons into the wakefield driven by a laser pulse guided inside capillary tubes is analyzed statistically in relation to laser and plasma parameters, and compared to results obtained in ...

  • publication . Conference object . Preprint . 2015
    Open Access English
    Authors:
    Adam Noble;
    Project: EC | LASERLAB-EUROPE (284464), EC | EUCARD-2 (312453)

    Comment: 8 pages, 3 figures. Invited paper: SPIE Optics + Optoelectronics: Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources. Prague, CZ (April 2015)

  • publication . Article . Other literature type . 2015
    Open Access
    Authors:
    Cho, M-H; Kim, Y-K; Suk, H; Ersfeld, B; Jaroszynski, D A; Hur, M S;
    Publisher: IOP Publishing
    Project: EC | EUCARD-2 (312453), EC | LASERLAB-EUROPE (284464)

    A new mechanism for electromagnetic emission in the terahertz (THz) frequency regime from laser-plasma interactions is described. A localized and long-lasting transverse current is produced by two counter-propagating short laser pulses in weakly magnetized plasma. We sh...

  • publication . Article . Other literature type . Preprint . Conference object . 2016
    Open Access English
    Authors:
    David Burton; Adam Noble; Timothy Walton;
    Project: EC | LASERLAB-EUROPE (284464), EC | EUCARD-2 (312453)

    Contemporary attempts to explain the existence of ultra-high energy cosmic rays using plasma-based wakefield acceleration deliberately avoid non-Standard Model particle physics. However, such proposals exploit some of the most extreme environments in the Universe and it...

  • publication . Article . 2014
    Open Access English
    Authors:
    Gregor H Welsh; Richard Shanks; Anna Subiel;
    Project: EC | LASERLAB-EUROPE (284464), EC | LASERLAB-EUROPE (228334), RCUK | CRITICAL MASS: Collective... (EP/J018171/1), EC | EUCARD-2 (312453)

    Electron beams from laser-plasma wakefield accelerators have low transverse emittance, comparable to those from conventional radio frequency accelerators, which highlights their potential for applications, many of which will require the use of quadrupole magnets for opt...

  • publication . Preprint . Article . 2019
    Open Access English
    Authors:
    Knetsch, Alexander; Karger, Oliver; Wittig, Georg; Groth, Henning; Xi, Yunfeng; Deng, Aihua; Rosenzweig, James Benjamin; Bruhwiler, David Leslie; Smith, Johnathan; Jaroszynski, Dino Anthony; ...
    Project: EC | LASERLAB-EUROPE (284464), EC | EUCARD-2 (312453)

    It is shown that the requirements for high quality electron bunch generation and trapping from an underdense photocathode in plasma wakefield accelerators can be substantially relaxed through localizing it on a plasma density downramp. This depresses the phase velocity ...

  • publication . Conference object . Part of book or chapter of book . 2015
    Open Access
    Authors:
    Ersfeld, B.; Bonifacio, R.; Chen, S.; Islam, M. R.; Jaroszynski, D. A.;
    Publisher: SPIE
    Project: EC | LASERLAB-EUROPE (284464), EC | EUCARD-2 (312453)

    The ion-channel laser (ICL) has been proposed as an alternative to the free-electron laser (FEL), replacing the deflection of electrons by the periodic magnetic field of an undulator with the periodic betatron motion in an ion channel. Ion channels can be generated by p...

  • publication . Article . Other literature type . 2016
    Open Access English
    Authors:
    Georg Wittig; Oliver S. Karger; Alexander Knetsch; Yunfeng Xi; Aihua Deng; James B. Rosenzweig; David L. Bruhwiler; Jonathan Smith; Zheng-Ming Sheng; Dino A. Jaroszynski; ...
    Project: EC | EUCARD-2 (312453), EC | LASERLAB-EUROPE (284464)

    Abstract We discuss considerations regarding a novel and robust scheme for optically triggered electron bunch generation in plasma wakefield accelerators [1] . In this technique, a transversely propagating focused laser pulse ignites a quasi-stationary plasma column bef...

19 research outcomes, page 1 of 2
Last index information