# M

 2020-01-2113:59 [PUBDB-2020-00441] Journal Article et al Spatio-Temporal Structure of a Petawatt Femtosecond Laser Beam JPhys photonics 1(3), 035001 - (2019) [10.1088/2515-7647/ab250d]   The development of optical metrology suited to ultrafast lasers has played a key role in the progress of these light sources in the last few decades. Measurement techniques providing the complete $E$-field of ultrashort laser beams in both time and space are now being developed. [...] OpenAccess: PDF PDF (PDFA); 2020-01-2014:19 [PUBDB-2020-00426] Journal Article et al Ion Acceleration in Laser Generated Mega Tesla Magnetic Vortex Physics of plasmas 26(10), 103108 - (2019) [10.1063/1.5094045]   Magnetic Vortex Acceleration (MVA) from near critical density targets is one of the promising schemes of laser-driven ion acceleration. 3D particle-in-cell simulations are used to explore a more extensive laser-target parameter space than previously reported in the literature as well as to study the laser pulse coupling to the target, the structure of the fields, and the properties of the accelerated ion beam in the MVA scheme. [...] OpenAccess: PDF PDF (PDFA); 2020-01-2013:56 [PUBDB-2020-00424] Journal Article et al Pulse Front Tilt Steering in Laser Plasma Accelerators   We report on the effect of laser spatiotemporal coupling in laser plasma accelerators. Pulse front tilt in the driving laser causes asymmetry in the wakefield, resulting in deflection of the electron beam from the laser axis. [...] OpenAccess: PDF PDF (PDFA); 2020-01-1514:48 [PUBDB-2020-00314] Journal Article et al THz-driven Surface Plasmon Undulator as a Compact Highly Directional Narrow Band Incoherent X-Ray Source   We propose a short period undulator which is based on the alternating electromagnetic field pattern of THz-driven surface plasmons in a thin conductive layer on a dielectric grating. An approximate analytical model allows to assess the key performance parameters of the undulator and to estimate the emitted radiation spectrum. [...] OpenAccess: PDF PDF (PDFA); 2018-12-0116:30 [PUBDB-2018-05136] Journal Article/Contribution to a conference proceedings et al Characterization of Self-Modulated Electron Bunches in an Argon Plasma 9th International Particle Accelerator Conference, VancouverVancouver, Germany, 29 Apr 2018 - 4 May 2018   The self-modulation instability is fundamental for the plasma wakefield acceleration experiment of the AWAKE (Advanced Wakefield Experiment) collaboration at CERN where this effect is used to generate proton bunches for the resonant excitation of high acceleration fields. Utilizing the availability of flexible electron beam shaping together with excellent diagnostics including an RF de-flector, a supporting experiment was set up at the electron accelerator PITZ (Photo Injector Test facility at DESY, Zeuthen site), given that the underlying physics is the same. [...] OpenAccess: PDF PDF (PDFA); 2018-12-0114:01 [PUBDB-2018-05122] Contribution to a conference proceedings/Contribution to a book et al Optimisation of High Transformer Ratio Plasma Wakefield Acceleration at PITZ 9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 2018 Geneva, Switzerland : JACoW Publishing 1648-1650 (2018) [10.18429/JACoW-IPAC2018-TUPML047]   The transformer ratio, the ratio between maximum accelerating field and maximum decelerating field in the driving bunch of a plasma wakefield accelerator (PWFA), is one of the key aspects of this acceleration scheme. It not only defines the maximum possible energy gain of the PWFA but it is also connected to the maximum percentage of energy that can be extracted from the driver, which is a limiting factor for the efficiency of the accelerator. [...] OpenAccess: PDF PDF (PDFA); 2018-12-0113:17 [PUBDB-2018-05117] Poster et al Optimisation of High Transformer Ratio Plasma Wakefield Acceleration at PITZ 4. Annual MT Meeting, BerlinBerlin, Germany, 12 Jun 2018 - 14 Jun 2018   OpenAccess: PDF PDF (PDFA); 2018-11-2809:43 [PUBDB-2018-04903] Conference Presentation et al Plasma acceleration experiments at DESY Zeuthen DPG - Frühjahrstagung 2018, WürzburgWürzburg, Germany, 19 Mar 2018 - 23 Mar 2018   Plasma acceleration has attracted a lot of attention in the past decade due to successful acceleration of electrons with gradients exceeding those of conventional accelerator technology by orders of magnitude. An experimental programme was started at the Photoinjector Test Facility, DESY Zeuthen (PITZ), to study aspects of the acceleration mechanisms in beam-driven plasma wakes. [...] OpenAccess: PDF PDF (PDFA); 2018-11-2808:44 [PUBDB-2018-04898] Journal Article/Contribution to a conference proceedings et al Photocathode laser based bunch shaping for high transformer ratio plasma wakefield acceleration 3rd European Advanced Accelerator Concepts workshop, EAAC 2017, ElbaElba, Italy, 24 Sep 2017 - 30 Sep 2017   Beam driven plasma acceleration is one of the most promising candidates for future compact particle accelerator technologies. In this scheme a particle bunch drives a wake in a plasma medium. [...] Published on 2018-02-16. Available in OpenAccess from 2019-02-16.: PDF PDF (PDFA); Restricted: PDF PDF (PDFA); External link: Fulltext 2018-01-2411:06 [PUBDB-2018-00780] Contribution to a conference proceedings/Contribution to a book et al External Injection Into a Laser-Driven Plasma Accelerator With Sub-Femtosecond Timing Jitter 8th International Particle Accelerator Conference, IPAC2017, CopenhagenCopenhagen, Denmark, 14 May 2017 - 19 May 2017 Geneva : JACoW 1699-1702 (2017) [10.18429/JACoW-IPAC2017-TUPIK009]   The use of external injection in plasma acceleration is attractive due to the high control over the electron beam parameters, which can be tailored to meet the plasma requirements and therefore preserve its quality during acceleration. However, using this technique requires an extremely fine synchronization between the driver and witness beams. [...] OpenAccess: Ferran Pousa_TUPIK009_author - PDF PDF (PDFA); Ferran Pousa_tupik009_JACoW - PDF PDF (PDFA);