MCS

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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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2019-11-15
10:04
OpenAccess [PUBDB-2019-04235] Contribution to a conference proceedings

Improving Gesture Recognition with Machine Learning: A Comparison of Traditional Machine Learning and Deep Learning
17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems, ICALEPCS 2019, New YorkNew York, USA, 5 Oct 2019 - 11 Oct 20192019-10-052019-10-11 noch nicht bekannt () [10.3204/PUBDB-2019-04235]  GO
Meaningful gesturing is important for an intuitive human-machine communication. This paper deals with methods suitable for identifying different finger, hand and head movements using supervised machine learning algorithms. [...]
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2019-10-30
14:22
OpenAccess [PUBDB-2019-03823] Contribution to a conference proceedings
et al
Parallel Operation of SASE1 and SASE3 at the European XFEL
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 25-28 () [10.3204/PUBDB-2019-03823]  GO
At the European XFEL a hard X-Ray SASE FEL (SASE1) and a soft X-Ray SASE FEL (SASE3) share in series the same electron beamline. This configuration couples the operation conditions for both undulators and their subsequent user experiments in terms of SASE intensity and background. [...]
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2019-10-14
16:19
[PUBDB-2019-03672] Contribution to a conference proceedings
et al
Multi-Beamline Operation 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 4 pp. ()
The European XFEL uses a unique beam distribution scheme to direct electron bunches to its three undulator lines.The accelerator delivers up to 600 microsecond long bunchtrains, out of which parts or individual bunches can be selectedfor photon production in any of the FELs. This contribution gives a brief overview of the kicker-septum scheme facilitating this and highlights how even complex bunch patterns can easily be configured via the timing system..
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2019-10-11
17:13
[PUBDB-2019-03662] Contribution to a conference proceedings
et al
Status of the PETRA IV project
10th International Particle Accelerator Conference, IPAC 2019, MelbourneMelbourne, Australia, 19 May 2019 - 24 May 20192019-05-192019-05-24 JACoW Publishing, Geneva, Switzerland 1404-1407 () [10.18429/JACOW-IPAC2019-TUPGW011]  GO
Since 2016 DESY has been pursuing R towards upgrading its PETRA synchrotron light source to a fourth-generation machine, PETRA IV, which is expected to start operation in 2027. The conceptual design of a 6 GeV seven-bend-achromat-based lattice with an approx. [...]
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2019-09-16
14:00
[PUBDB-2019-03349] Preprint/Report
et al
Evidence for Parity Violation in Gravitational Fields
[DESY-18-171]
Discrete symmetries in gravity have only been tested for low energy, non-relativistic matter, confirm-ing the perfectly symmetric general relativity. A hint for high energy CP violation in gravitational fields has recently been found in the HERA Compton polarimeter’s two spectra, measured with electron and positron beams. [...]
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2019-09-16
13:44
[PUBDB-2019-03348] Preprint/Report

Web2cHMI: A Multi-Modal Native User Interface Implementation for AcceleratorOperations and Maintenance Applications
[DESY-17-006]
The advent of advanced mobile, gaming and virtual or augmented reality devices provides userswith novel interaction modalities. Speech, finger- and hand gesture recognition are commonly usedtechnologies, often enriched with data from embedded gyroscope-like motion sensors and 3D graphi-cal visualization features. [...]
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2018-11-27
18:12
OpenAccess [PUBDB-2018-04891] Contribution to a conference proceedings/Contribution to a book
et al
Status of the Hard X-Ray Self-Seeding Project at the European XFEL
[Ebook] FEL 2017 : 38th International Free Electron Laser Conference : 20th-25th August, 2017, Santa Fe Convention Center, Santa Fe, NM, USA / editors: Kip Bishofberger (LANL), Bruce Carlsten (LANL), Volker RW Schaa (GSI , [Genf] : [CERN], [2018],
38th International Free Electron Laser Conference, FEL 2017, Santa FeSanta Fe, USA, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25
Geneva, Switzerland : JACoW 42-45 () [10.18429/JACoW-FEL2017-MOP008]  GO
A Hard X-ray Self-Seeding setup is currently under realization at the European XFEL, and will be ready for installation in 2018. The setup consists of two single-crystal monochromators that will be installed at the SASE2 undulator line. [...]
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2018-11-13
14:29
OpenAccess [PUBDB-2018-04471] Preprint/Report
et al
Opportunities in Machine Learning for Particle Accelerators
[arXiv:1811.03172]
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Machine learning (ML) is a subfield of artificial intelligence. The term applies broadly to a collection of computational algorithms and techniques that train systems from raw data rather than a priori models. [...]
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2018-11-07
17:18
OpenAccess [PUBDB-2018-04302] Contribution to a conference proceedings

Further Improvements in Power Supply Controller Transient Recorders for Post-Mortem Analysis of BPM Orbit Dumps at PETRA-III
12th International Workshop on Personal Computers and Particle Accelerator Controls, PCaPAC 2018, HsinchuHsinchu, Taiwan, 16 Oct 2018 - 19 Oct 20182018-10-162018-10-19 JACoW 4 pp. () [10.3204/PUBDB-2018-04302]  GO
PETRA-III is a 3rd generation synchrotron light source dedicated to users with 14 beamlines beginning operations in 2010. The storage ring was modified in 2014 for an additional 12 beamlines in two extensions. [...]
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