Poster

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2017-12-12
15:27
arXiv [PUBDB-2017-13362] Report/Poster
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Search for Heavy Higgs Bosons A / H Decaying to a Top Quark Pair in p p Collisions at s = 8     TeV with the ATLAS Detector
[CERN-EP-2017-134]
EPS-HEP 2017, EPS-HEP 2017, Meeting locationGeneva, Suisse, 9 Nov 2017 - 9 Nov 20172017-11-092017-11-09 (2017) [10.1103/PhysRevLett.119.191803]  GO
ddc:550
A search for heavy pseudoscalar ($A$) and scalar ($H$) Higgs bosons decaying into a top quark pair ($t\bar{t}$) has been performed with 20.3 fb$^{-1}$ of proton--proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy of $\sqrt{s} = 8$ TeV. Interference effects between the signal process and Standard Model $t\bar{t}$ production, which are expected to distort the signal shape from a single peak to a peak--dip structure, are taken into account. [...]
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2017-12-11
13:08
OpenAccess [PUBDB-2017-13234] Poster
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Studies of the Transverse Beam Coupling in the European XFEL Injector
38th International Free Electron Laser Conference, Meeting locationSanta Fe, USA, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25  GO
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2017-11-29
18:21
OpenAccess [PUBDB-2017-12558] Poster
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Double Pulse FEL Operation at FLASH
38th International Free Electron Laser Conference, FEL2017, Meeting locationSanta Fe, United States, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25  GO
The free-electron laser facility FLASH at DESY (Hamburg, Germany) is a user facility since 2005 providing high brilliance XUV and soft X-ray pulses. The facility runs 10 Hz bursts of hundreds of electron bunches, where the bunch distance in the burst is 1 us or more. [...]
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2017-11-29
18:17
OpenAccess [PUBDB-2017-12557] Poster
; ; ; et al
Update on the Lifetime of Cs$_2$Te Cathodes Operated at the FLASH Facility
38th International Free Electron Laser Conference, FEL2017, Meeting locationSanta Fe, United States, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25  GO
The photoinjector of the free-electron laser facilityFLASH at DESY (Hamburg, Germany) uses Cs2Te photocathodes.We give an update on lifetime and quantumefficiency of cathodes operated at FLASH during the lastyears. At the time of the conference, cathode 73.3 has beenoperated with a record of 933 days with a stable quantumefficiency of in average 8.8 %..
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2017-11-23
16:17
OpenAccess [PUBDB-2017-12256] Poster
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Quadrupole Scan Measurements in the Beam Transport Line between DESY II and PETRA III
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19  GO
PETRA III is a 6 GeV third generation synchrotron light source in Hamburg, Germany. The storage ring is operated with a typical beam current of 100 mA and is running in top-up mode. [...]
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2017-11-16
17:02
OpenAccess [PUBDB-2017-12070] Poster
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RF Heat Load Compensation for the European XFEL
16th International Conference on Accelerator and Large Experimental Control Systems, ICALEPCS2017, Meeting locationBarcelona, DESY, Spain, 8 Oct 2017 - 13 Oct 20172017-10-082017-10-13  GO
The European XFEL is a 3.4km long X-ray Free Elec-tron Laser. The accelerating structure consists of 96 cryo modules running at 1.3 GHz with 10 Hz repetition rate. [...]
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2017-11-16
15:02
OpenAccess [PUBDB-2017-12064] Poster
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Experience on In-Situ Module Repair and Set up of Non XFEL Cavity Strings at DESY
18th International Conference on RF Superconductivity, SRF2017, Meeting locationLanzhou, China, 17 Jul 2017 - 21 Jul 20172017-07-172017-07-21  GO
All components installed to the European XFEL cavity string modules underwent an intensive inspection and quality control before acceptance for installation to cavities or modules. Even though some RF feed throughs for HOM coupler- and Pick Up antennas showed leaks at the ceramic insulation after module test at 2 K. [...]
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2017-11-16
14:41
OpenAccess [PUBDB-2017-12062] Poster
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A New High Resolution Optical System for Inspection of Gun – and Multi-Cell Resonators in ISO-4 Cleanrooms
18th International Conference on RF Superconductivity, SRF2017, Meeting locationLanzhou, China, 17 Jul 2017 - 21 Jul 20172017-07-172017-07-21  GO
Optical inspection of the inner surface of superconducting resonators was established during European XFEL cavity production by usage of the so called OBACHT optical inspection. In addition to the surface inspection by OBACHT a new optical inspection system with integrated high resolution camera is set up at DESY. [...]
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2017-11-14
13:20
[PUBDB-2017-11964] Poster
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Time resolved measurement of fluorescence kinetics from Adenine excited by soft X-rays
Workshop on Science of “From Matter to Materials and Life”, Meeting locationHamburg, Germany, 14 Dec 2016 - 16 Dec 20162016-12-142016-12-16

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2017-11-14
11:37
OpenAccess [PUBDB-2017-11947] Poster

Calibration of light-flavour jet b-tagging rateson ATLAS data at $\sqrt{s} =$ 13 TeV
EPS Conference on High Energy Physics, HEP2017, Meeting locationVenice, Italy, 5 Jul 2017 - 12 Jul 20172017-07-052017-07-12  GO
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