MFL

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2018-07-11
17:56
OpenAccess [PUBDB-2018-02583] Conference Presentation
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PolariX TDS - Applications at DESY
High Gradient Workshop 2018, HG2018, SINAPShanghai, SINAP, China, 4 Jun 2018 - 8 Jun 20182018-06-042018-06-08  GO
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2018-05-29
11:22
OpenAccess [PUBDB-2018-02128] Poster
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Cs$_2$Te Photocathode Lifetime at FLASH and European XFEL
The 9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
The photoinjectors of FLASH and the European XFEL at DESY (Hamburg, Germany) use Cs$_2$ Te photocathodes. In this contribution we give an update on the lifetime and quantum efficiency of the cathodes operated in both facilities [...]
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2018-05-09
14:08
OpenAccess [PUBDB-2018-01937] Book/Report/Dissertation / PhD Thesis
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Generation of ultra-short low-charge electron bunches for single-spike SASE radiation at the Free-Electron Laser in Hamburg
[DESY-THESIS-2018-015]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 144 pp. () [10.3204/PUBDB-2018-01937] = Dissertation, Universität Hamburg, 2017  GO
High-gain Free-Electron Lasers (FEL) constitute a powerful source of intense, short radiation pulses in the XUV and X-ray range that are used in a wide variety of research fields. They typically work in the Self-Amplified Spontaneous Emission (SASE) Mode. [...]
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2018-03-29
13:22
[PUBDB-2018-01601] Contribution to a conference proceedings/Contribution to a book
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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.5
CLEO: Applications and Technology, CLEO 2017, San JoseSan Jose, California, 14 May 2017 - 19 May 20172017-05-142017-05-19
Washington, DC : OSA, OSA technical digest (online) JTu4L.5 () [10.1364/CLEO_AT.2017.JTu4L.5]  GO
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. [...]

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2017-12-22
14:09
OpenAccess [PUBDB-2017-14061] Contribution to a conference proceedings
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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, ArcidossoArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22 10 pp. () [10.3204/PUBDB-2017-14061]  GO
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. [...]
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2017-12-22
14:02
OpenAccess [PUBDB-2017-14060] Journal Article
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Experimental study of EUV mirror radiation damage resistance under long-term free-electron laser exposures below the single-shot damage threshold
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. [...]
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2017-12-22
13:56
OpenAccess [PUBDB-2017-14058] Contribution to a conference proceedings
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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, ArcidossoArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22 13 pp. () [10.3204/PUBDB-2017-14058]  GO
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). [...]
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2017-12-22
13:55
OpenAccess [PUBDB-2017-14057] Conference Presentation (Invited)
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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, ArcidossoArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22  GO
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. [...]
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2017-12-22
13:47
OpenAccess [PUBDB-2017-14055] Contribution to a conference proceedings

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, ArcidossoArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22 12 pp. () [10.3204/PUBDB-2017-14055]  GO
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. [...]
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2017-12-18
13:22
OpenAccess [PUBDB-2017-13633] Poster

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, ArcidossoArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22  GO
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. [...]
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