MXL

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2019-12-30
12:47
OpenAccess [PUBDB-2019-05679] Contribution to a conference proceedings/Contribution to a book
et al
Steffen Hard-Edge Model for Quadrupoles with Extended Fringe-Fields at the European XFEL
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 588-591 () [10.18429/JACOW-FEL2019-THP001]  GO
For modeling of linear focusing properties of quadrupole magnets the conventional rectangular model is commonly used for the design and calculations of the linear beam optics for accelerators. At the European XFEL the quadrupole magnets are described using a more accurate Steffen hard-edge model. [...]
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2019-12-18
14:51
OpenAccess [PUBDB-2019-05406] Journal Article
et al
Model-Independent Tuning for Maximizing Free Electron Laser Pulse Energy
The output power of a free electron laser (FEL) has extremely high variance even when all FEL parameter set points are held constant because of the stochastic nature of the self-amplified spontaneous emission (SASE) FEL process, drift of thousands of coupled parameters, such as thermal drifts, and uncertainty and time variation of the electron distribution coming off of the photo cathode and entering the accelerator. In this work, we demonstrate the application of automatic, model-independent feedback for the maximization of average pulse energy of the light produced by free electron lasers. [...]
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ddc:530
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2019-12-02
13:59
[PUBDB-2019-04657] Journal Article
et al
Design of Hard X-Ray Self-Seeding Monochromator for European XFEL
13th International Conference on Synchrotron Radiation Instrumentation, SRI2018, TaipeiTaipei, Taiwan, AIP conference proceedings 2054(1), 030016-1-[10] J. Gruenert, M. Planas Carbonell, F. Dietrich, W. Freund, A. Koch, N. Kujala, J. Laksman, J. Liu, and T. Maltezopoulos, This proceedings (2018). [11] M. Altarelli and et al, Technical Report ( 2006), preprint DESY 2006-097. [12] T. Limberg and W. Decking, Technical Note ( 2013), xFEL.EU TN-2013-004. [13] D. Shu, Y. Shvyd’ko, J. Amann, P. Emma, S. Stoupin, and Quintana, J. Phys.: Conf. Ser. p. 603 (2013). 030016-6 () [10.1063/1.5084579]  GO
Self-amplified spontaneous emission (SASE) XFELs are unique sources producing extremely powerful, ultra-short X-ray pulses. However, they rely on the amplification of the electron beam shot-noise, resulting in a relatively broad, spiky radiation spectrum. [...]
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ddc:530
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2019-12-02
13:53
OpenAccess [PUBDB-2019-04656] Journal Article
et al
Preparing for High-Repetition Rate Hard X-Ray Self-Seeding at the European X-Ray Free Electron Laser: Challenges and opportunities
A hard x-ray self-seeding (HXRSS) setup will soon be available at the European X-ray Free Electron Laser (XFEL). The availability of high repetition rate x-ray pulses poses novel challenges in the setup development, compared to the choices made at other facilities, mainly crystal heat-load and radiation-damage issues. [...]
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ddc:530
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2019-11-22
14:28
OpenAccess [PUBDB-2019-04436] Contribution to a conference proceedings
et al
Frequency-Detuning Dependent Transient Coaxial RF Coupler Kick
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 599-602 () [10.18429/JACOW-FEL2019-THP007]  GO
We model and characterize a transverse kick which results from the coaxial RF coupler in the L-band RF gun at the Photo Injector Test Facility at DESY in Zeuthen (PITZ). The RF pulse is typically 600 µs long and used to produce a train of up to 2700 electron bunches. [...]
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2019-11-19
14:34
[PUBDB-2019-04307] Contribution to a conference proceedings

Status of Automated Optimization Procedures at the European XFEL Accelerator
10th International Particle Accelerator Conference, IPAC 2019, MelbourneMelbourne, Australia, 19 May 2019 - 24 May 20192019-05-192019-05-24 JACoW Publishing, Geneva, Switzerland 1212–1215 () [10.18429/JACOW-IPAC2019-TUZZPLM2]  GO
The European XFEL is in the operational stage since fall 2017. Since then, tuning of the FEL performance (e.g. [...]

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2019-11-19
09:50
[PUBDB-2019-04295] Contribution to a conference proceedings
et al
Long Pulse Kicker for European XFEL Beam Distribution
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 3 pp. () [doi.org/10.18429/JACoW-FEL2019-WEP014]  GO
A special feature of the European XFEL X-ray laser is the possibility to distribute the electron bunches of one beam pulse to different free-electron laser (FEL) beam-lines. This is achieved through a combination of kickers and a Lambertson DC septum. [...]
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2019-11-19
09:39
[PUBDB-2019-04294] Contribution to a conference proceedings
et al
Fast Kicker System for European XFEL Beam Distribution
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 4 pp. () [doi.org/10.18429/JACoW-FEL2019-WEP013]  GO
A special feature of the European XFEL X-ray laser is the possibility to distribute the electron bunches of one beam pulse to different free-electron laser (FEL) beam-lines. This is achieved through a combination of kickers and a Lambertson DC septum. [...]
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2019-11-18
16:13
[PUBDB-2019-04282] Contribution to a conference proceedings
et al
Two Colors at the SASE3 Line of the European XFEL: Project Scope and First Measurements
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 195-198 () [10.18429/JACOW-FEL2019-TUP062]  GO
The European XFEL is a high-repetition rate facility that generates high-power SASE radiation pulses in three beamlines. A joint upgrade project, with Finnish universities, to equip the SASE3 beamline with a chicane has been recently approved to generate two SASE pulses with different photon energies and temporal separation. [...]
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2019-11-18
16:06
[PUBDB-2019-04281] Contribution to a conference proceedings
et al
First Characterization of the Photon Beam at the European XFEL in July, 2017
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 180–183 () [10.18429/JACoW-FEL2019-TUP058]  GO
North branch of the European XFEL, SASE1, produced first light on May 3rd, 2017, and XFEL operation has been gradually improved then. First characterization of the photon beam has been performed in July / August 2017, just before an official starting date of user experiments (September 1st, 2017). [...]
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