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2016-12-07
10:20
OpenAccess [PUBDB-2016-05971] Report/Conference Presentation (Plenary/Keynote)
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Commissioning of the European XFEL Injector
[TUOCA03]
7th International Particle Accelerator Conference, IPAC16, Meeting locationBusan, Korea, 8 May 2016 - 13 May 20162016-05-082016-05-13
 GO
The European XFEL Injector consists of an L-Band RF photoinjector, a TESLA type 1.3 GHz module, a 3rd har-monic RF section, a laser heater and an extensive diag-nostic section to determine projected and slice properties of the beam. The commissioning of the complete system has been started in December 2015 after several years of construction. [...]
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2016-08-10
13:50
OpenAccess [PUBDB-2016-02922] Journal Article
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Simultaneous Operation of Two Soft X-Ray Free-Electron Lasers Driven by One Linear Accelerator
ddc:530
Extreme-ultraviolet to x-ray free-electron lasers (FELs) in operation for scientific applications are up to now single-user facilities. While most FELs generate around 100 photon pulses per second, FLASH at DESY can deliver almost two orders of magnitude more pulses in this time span due to its superconducting accelerator technology. [...]
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2015-12-23
15:00
OpenAccess [PUBDB-2015-06240] Poster
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Lifetime of Cs2Te Cathodes Operated at the FLASH Facility
37th International Free Electron Laser Conference, FEL 2015, Meeting locationDaejeon, South Korea, 23 Aug 2015 - 28 Aug 20152015-08-232015-08-28
The injector of the free-electron laser facility FLASH at DESY (Hamburg, Germany) uses Cs2Te photocathodes.We report on the lifetime, quantum efficiency (QE), and darkcurrent of photocathodes operated at FLASH during the last year. Cathode 618.3 has been operated for a record of 439 days with a stable QE in the order of 3%. [...]

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2015-12-23
14:55
OpenAccess [PUBDB-2015-06238] Contribution to a conference proceedings
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Lifetime of Cs2Te Cathodes Operated at the FLASH Facility
Proceedings of FEL2015
37th International Free Electron Laser Conference, FEL 2015, Meeting locationDaejeon, South Korea, 23 Aug 2015 - 28 Aug 20152015-08-232015-08-28
1 pp. (2015)
The injector of the free-electron laser facility FLASH at DESY (Hamburg, Germany) uses Cs2Te photocathodes.We report on the lifetime, quantum efficiency (QE), and darkcurrent of photocathodes operated at FLASH during the last year. Cathode 618.3 has been operated for a recordof 439 days with a stable QE in the order of 3%. [...]
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2015-12-23
10:51
OpenAccess [PUBDB-2015-06207] Contribution to a conference proceedings
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Horizontal RF Test of a Fully Equipped 3.9 GHz Cavity for the European XFEL in the DESY AMTF
17th International Conference on RF Superconductivity, SRF2015, Meeting locationWhistler, Canada, 13 Sep 2015 - 18 Sep 20152015-09-132015-09-18
1-5 (2015)
In order to validate the cavity package concept before the module preparation for the European XFEL Injector, one 3.9 GHz cavity, complete with magnetic shielding, power coupler and frequency tuner was tested in a specially designed single cavity cryomodule in one of the caves of the DESY Accelerator Module Test Facility (AMTF). The cavity was tested in high power pulsed operation up to the quench limit of 24 MV/m, above the vertical test qualifications and all subsystems under test (coupler, tuner, waveguide tuners, LLRF system) were qualified to design performances..
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2015-11-05
15:08
OpenAccess [PUBDB-2015-04562] Contribution to a conference proceedings
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Connection of EU-XFEL Cryomodules, Caps and Boxes in the EU-XFEL Main LINAC And Injector: Welding of Cryo-Pipes and Assembly of Beamline Absorbers under the Requirements of the PED Regulation
17th International Conference on RF Superconductivity, SRF2015, Meeting locationWhistler, Canada, 13 Sep 2015 - 18 Sep 20152015-09-132015-09-18
5 pp. (2015)
The European X-ray Free Electron Laser (EU-XFEL) [1] cold linac [2] consists of 100 assembled cryomodules, 6 feed/end boxes and 6 string connection boxes fixed to the ceiling of the accelerator tunnel; the injector consists of a radio frequency gun, one 1.3 GHz and one 3.9 GHz cryomodule, one feed and one end cap lying on ground supports. The components are connected together in the tunnel, after cold testing, transport, final positioning and alignment. [...]
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2015-05-07
11:21
OpenAccess [PUBDB-2015-02054] Conference Presentation

European XFEL In-Kind Contributions: A Look Into the Main Features of the Designed Vacuum Systems
Associazione Italiana del Vuoto, AIV XXII Conference, Meeting locationGenova, Italy, 20 Apr 2015 - 22 Apr 20152015-04-202015-04-22
The European X-ray Free-Electron Laser (XFEL) is being built starting from the DESY Hamburg campus. The European XFEL will adopt the Self-Amplified Spontaneous Emission (SASE) process to generate extremely brilliant and ultrashort pulses of spatially coherent X-rays with tunable wavelengths down to 0.1 nm. [...]

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2015-01-16
09:23
OpenAccess [PUBDB-2015-00672] Contribution to a conference proceedings
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Statistic to Eddy-Current Scanning of Niobium Sheets for the European XFEL
International Conference on RF Superconductivity, Meeting locationParis, France, 23 Sep 2013 - 27 Sep 20132013-09-232013-09-27
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2014-03-13
13:39
OpenAccess [DESY-2014-02369] Patent
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Verfahren zur metallischen Innenbeschichtung von Hohlkörpern, insbesondere von Strahlrohrelementen
 GO
This paper will give an overview of the various steps of the commissioning of large vacuum systems for accelerators. Following some introductory remarks the pump down, leak check, bake out as well as component, interlock and safety checks will be covered in detail. [...]
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2013-11-20
16:40
OpenAccess [DESY-2013-01157] Poster
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Statistic to Eddy-Current Scanning of Niobium Sheets for FOR the European XFEL
16th International Conference on RF Superconductivity, SRF2013, Meeting locationParis, France, 23 Sep 2013 - 27 Sep 20132013-09-232013-09-27
The fabrication experiences of superconducting cavities for FLASH have shown that eddy-current scanning of the Nb-sheets foreseen for half-cells reduces the cavity failures. New Eddy-Current devices have been developed and build together with the industry for the production of 800 pieces 1.3 GHz superconducting niobium cavities for European XFEL. [...]
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