MFL

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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
ICFA mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22 10 pp. (2017) [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
ddc:540
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
ICFA mini-workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22 13 pp. (2017) [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
Nonlinear dynamics and Collective Effects in particle beam physics, NOCE2017, Meeting locationArcidosso, 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
ICFA mini-workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22 12 pp. (2017) [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
ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, I, 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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2017-12-18
12:52
OpenAccess [PUBDB-2017-13627] Poster
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Arbitrary Order Perturbation Theory for Time--Discrete Vlasov Systems with Drift Maps and Poisson Type Collective Kick Maps
ICFA Mini-Workshop on Nonlinear Dynamics and Collective Effects in Particle Beam Physics, NOCE2017, Meeting locationArcidosso, Italy, 19 Sep 2017 - 22 Sep 20172017-09-192017-09-22  GO
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). [...]
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2017-12-18
11:00
OpenAccess [PUBDB-2017-13615] Contribution to a conference proceedings
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Status of the Soft X-Ray Free Electron Laser FLASH
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19 3 pp. (2017) [10.3204/PUBDB-2017-13615]  GO
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. [...]
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2017-12-18
10:52
OpenAccess [PUBDB-2017-13612] Poster
; ; ; et al
Status of the Soft X-Ray Free Electron Laser FLASH
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19  GO
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. [...]
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2017-12-14
10:37
OpenAccess [PUBDB-2017-13463] Contribution to a conference proceedings
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X-Band TDS Project
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19 4 pp. (2017) [10.3204/PUBDB-2017-13463]  GO
Based on the success of the X-band Transverse Deflecting Structure (TDS) diagnostic at LCLS [1], a collaboration between DESY, PSI and CERN has formed with the aim of developing and building an advanced modular X-band TDS system. The designed TDS has the new feature of providing variable polarization of the deflecting field [2]. [...]
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