# MFL

 2018-03-2913:22 [PUBDB-2018-01601] Contribution to a conference proceedings/Contribution to a book et al Operation of a seeded XUV free electron laser at DESY with high-gain harmonic generation seeding Conference on Lasers and Electro-Optics : [Proceedings] - OSA Washington, D.C., 2017. - ISBN 978-1-943580-27-9 - doi:10.1364/CLEO_AT.2017.JTu4L.5CLEO: Applications and Technology, CLEO 2017, Meeting locationSan Jose, California, 14 May 2017 - 19 May 2017 Washington, DC : OSA, OSA technical digest (online), JTu4L.5 (2017) [10.1364/CLEO_AT.2017.JTu4L.5]   The XUV free electron laser FLASH has been recently operated in the high-gain harmonic generation (HGHG) mode. We characterized the laser-induced energy modulation, as well as the temporal profile of the seeded FEL pulses. [...] 2017-12-2214:09 [PUBDB-2017-14061] Contribution to a conference proceedings Vogt, M. A Time-Discrete Vlasov Approach to LSC Driven Microbunching in FEL-like Beam Lines International ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 2017 10 pp. (2017) [10.3204/PUBDB-2017-14061]   Multi-stage bunch compression setups which are commonplace in Free-Electron Laser (FEL) beam lines have shown to be the source of a collective beam instability, the so-called microbunching instability. Collective forces can, in conjunction with the dispersive effect of the magnetic chicane present in such a compressor stage, lead to an amplification of inhomogeneities in the longitudinal charge density of an electron bunch. [...] OpenAccess: PDF PDF (PDFA); 2017-12-2214:02 [PUBDB-2017-14060] Journal Article et al Experimental study of EUV mirror radiation damage resistance under long-term free-electron laser exposures below the single-shot damage threshold Journal of synchrotron radiation 25(1), 77 - 84 (2018) [10.1107/S1600577517017362]   The durability of grazing- and normal-incidence optical coatings has been experimentally assessed under free-electron laser irradiation at various numbers of pulses up to 16 million shots and various fluence levels below 10% of the single-shot damage threshold. The experiment was performed at FLASH, the Free-electron LASer in Hamburg, using 13.5 nm extreme UV (EUV) radiation with 100 fs pulse duration. [...] OpenAccess: PDF PDF (PDFA); 2017-12-2213:56 [PUBDB-2017-14058] Contribution to a conference proceedings Amstutz, P. Arbitrary Order Perturbation Theory for Time-Discrete Vlasov Systems with Drift Maps and Poisson Type Collective Kick Maps International ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 2017 13 pp. (2017) [10.3204/PUBDB-2017-14058]   The well established model for studying the micro-bunching instability driven by longitudinal space charge in ultra-relativistic bunches in FEL-like beamlines can be identified as a time-discrete Vlasov model with general drift maps and Poisson type collective kick maps. This model can in principle be solved exactly using the method of characteristics (Perron-Frobenius operator method). [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-12-2213:55 [PUBDB-2017-14057] Conference Presentation (Invited) Vogt, M. A Time-Discrete Vlasov Approach to LSC Driven Microbunching in FEL-like Beam Lines International ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 2017   Multi-stage bunch compression setups which are commonplace in Free-Electron Laser (FEL) beam lines have shown to be the source of a collective beam instability, the so-called microbunching instability. Collective forces can, in conjunction with the dispersive effect of the magnetic chicane present in such a compressor stage, lead to an amplification of inhomogeneities in the longitudinal charge density of an electron bunch. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-12-2213:47 [PUBDB-2017-14055] Contribution to a conference proceedings Vogt, M. A Beam Dynamics View on a Generalized Formulation of Spin Dynamics, Based on Topological Algebra, with Examples International ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 2017 12 pp. (2017) [10.3204/PUBDB-2017-14055]   Here I rephrase some of the results of work performed in several collaborations with K.Heinemann and J.A.Ellison (University of New Mexico, Department of Mathematics, Albuquerque, NM, USA), D.P.Barber (DESY; also visiting staff member at the University of Liverpool, Liverpool, UK, EU), and A.Kling (University of Applied Sciences Osnabrueck, Lingen, Germany, EU) on a generalized look on spin dynamics and beam polarization in storage rings. It is done in a way that emphasizes the applicability of the concepts to real world polarized beams rather than presenting the results in their most general form. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-12-1813:22 [PUBDB-2017-13633] Poster Vogt, M. A Beam Dynamics View on a Generalized Formulation of Spin Dynamics, Based on Topological Algebra, with Examples International ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 2017   Here I rephrase the results of work performed in several collaborations with K.Heinemann, and J.A.Ellison (University of New Mexico, Department of Mathematics, Albuquerque, NM, USA), D.P.Barber (DESY; also visiting staff member at the University of Liverpool, Liverpool, UK, EU), and A.Kling (University of Applied Sciences Osnabr\"{u}ck, Lingen, Germany, EU) on a generalized look on spin dynamics and beam polarization in storage rings. It is done in a way that emphasizes the applicability of the concepts to real world polarized beams rather than presenting the results in their most general form. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-12-1812:52 [PUBDB-2017-13627] Poster Vogt, M. Arbitrary Order Perturbation Theory for Time--Discrete Vlasov Systems with Drift Maps and Poisson Type Collective Kick Maps International ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 2017   The well established model for studying the microbunching instability driven by longitudinal space charge in ultra-relativistic bunches in FEL-like beamlines can be identified as a time-discrete Vlasov model with general drift maps and Poisson type collective kick maps. This model can in principle be solved exactly using the method of characteristics (Perron-Frobenius operator method). [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-12-1811:00 [PUBDB-2017-13615] Contribution to a conference proceedings et al Status of the Soft X-Ray Free Electron Laser FLASH 8th International Particle Accelerator Conference, IPAC2017, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 2017 JACoW, Geneva, Switzerland, 3 pp. (2017) [10.18429/JACoW-IPAC2017-WEPAB025]   The superconducting free-electron laser user facility FLASH at DESY in Hamburg, routinely produces several thousand photon pulses per second. The operational parameters cover a wavelength range from 90 nm down to 4 nm with pulse energies from several $\mu$J up to 1 mJ and with pulse durations of several hundred fs down to a few fs. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-12-1810:52 [PUBDB-2017-13612] Poster et al Status of the Soft X-Ray Free Electron Laser FLASH 8th International Particle Accelerator Conference, IPAC2017, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 2017   The superconducting free-electron laser user facility FLASH at DESY in Hamburg, routinely produces several thousand photon pulses per second. The operational parameters cover a wavelength range from 90 nm down to 4 nm with pulse energies from several $\mu$J up to 1 mJ and with pulse durations of several hundred fs down to a few fs. [...] OpenAccess: PDF PDF (PDFA);