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2018-08-17
11:22
[PUBDB-2018-02999] Book/Report
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Analysis of RF results of recent Nine-Cell cavities at DESY
[TTC-Report 2009-01]
TESLA Reports 5 pp. ()
About 50 nine-cell cavities of the recent fine-grain niobium cavity productions have been analysed with respect to maximum and usable gradient in the first and last vertical RF acceptance test, respectively. Parameters of the analysis were the manufacturer of the cavities, the location of the Main EP (=> industry or in-house), the final surface treatment (=> final 40 μm EP or short 10 μm “Flash BCP) and the cavity preparation strategy (=> vertical acceptance test with or without He-tank welded) [...]
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2018-08-17
11:22
[PUBDB-2018-02997] Book/Report
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Fertigungsablauf des einzelligen Standard DESY 1.3 GHz Resonators aus Niob
[TTC-Report 2010‐01]
TESLA Reports 11 pp. ()
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2018-04-23
10:42
OpenAccess [PUBDB-2018-01803] Journal Article
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Influence of Tests Results on Serial Production of EXFEL Superconducting Cavities
III International Conference on Laser and Plasma Researches and Technologies, LaPlas-2017, MoscowMoscow, Russia, 24 Jan 2017 - 27 Jan 20172017-01-242017-01-27 Journal of physics / Conference Series 941, 012103 () [10.1088/1742-6596/941/1/012103]  GO
The European XFEL (EXFEL) 1.3 GHz cavities were produced without any final cold RF performance guarantee for characteristics like accelerating gradient, quality factor or field emission. In the case of low-performance, DESY provided all re-treatment procedures in order to improve these characteristics getting closer to specification levels. [...]
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2018-01-11
13:36
DBCoverage [PUBDB-2018-00489] Journal Article
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Validation of the superconducting 3.9 GHz cavity package for the European X-ray Free Electron Laser
A full test of the cavity package concept under realistic operating condition was a necessary step before the assembly of the European XFEL (EXFEL) 3.9 GHz superconducting system and its installation in the accelerator. One cavity, equipped with magnetic shielding, power coupler and frequency tuner has been tested in a specially designed single cavity cryostat in one of the test benches of the DESY Accelerator Module Test Facility (AMTF). [...]
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2017-12-21
16:03
OpenAccess [PUBDB-2017-13971] Contribution to a conference proceedings/Contribution to a book
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Limits for the Operation of the European XFEL 3.9 GHz System in CW Mode
8th International Particle Accelerator Conference, IPAC2017, CopenhagenCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19 JACoW 1023-1026 () [10.3204/PUBDB-2017-13971]  GO
Future upgrades of the European XFEL (EXFEL) facility may require driving the linac at higher duty factor, possibly extending to CW mode at reduced gradients. A preliminary analysis for the accelerator modules has been presented in the EXFEL TDR, but no precise assessment has been performed so far for the present 3.9 GHz system design. [...]
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2017-12-18
16:19
OpenAccess [PUBDB-2017-13659] Talk (non-conference) (Invited)
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European XFEL Procurement Strategy – Lessons Learned
TTC Meeting February 2017, Michigan State UniversityEast Lansing, Michigan State University, USA, 21 Feb 2017 - 24 Feb 20172017-02-212017-02-24  GO
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2017-12-18
15:27
OpenAccess [PUBDB-2017-13655] Conference Presentation
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The Commissioning of the European-XFEL Linac and its Performance
18th International Conference on RF Superconductivity, SRF2017, LanzhouLanzhou, China, 17 Jul 2017 - 21 Jul 20172017-07-172017-07-21  GO
The main linac of the superconducting accelerator of the European XFEL presently consists of 96 accelerator modules, each housing eight 1.3 GHz TESLA-type cavities, with an average design gradient of 23.6 MV/m. The performance of each individual module has been tested after module assembly in the Accelerator Module Test Facility (AMTF) at DESY. [...]
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2017-12-18
15:13
OpenAccess [PUBDB-2017-13653] Contribution to a conference proceedings
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The Commissioning of the European-XFEL Linac and its Performance
18th International Conference on RF Superconductivity, SRF2017, LanzhouLanzhou, China, 17 Jul 2017 - 21 Jul 20172017-07-172017-07-21 Geneva : JACoW 100-105 () [10.3204/PUBDB-2017-13653]  GO
The main linac of the superconducting accelerator of the European XFEL presently consists of 96 accelerator modules, each housing eight 1.3 GHz TESLA-type cavities, with an average design gradient of 23.6 MV/m. The performance of each individual module has been tested after module assembly in the Accelerator Module Test Facility (AMTF) at DESY. [...]
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2017-12-14
11:29
OpenAccess [PUBDB-2017-13474] Journal Article
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Fabrication and Vertical Test Experience of the European X-ray Free Electron Laser 3.9 GHz Superconducting Cavities
We report the experience of the production, processing and qualification testing of the superconducting radio frequency cavities at 3.9 GHz for the third harmonic system at the European XFEL (EXFEL) injector. The rf structure concept, originally developed for the FLASH FEL facility, was adapted to the new interfaces provided by the EXFEL design and the cavities were procured from a qualified vendor, delivered ready for the testing at the INFN infrastructure [...]
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2017-11-28
06:00
OpenAccess [PUBDB-2017-12412] Contribution to a conference proceedings/Contribution to a book
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Commissioning of the European XFEL Accelerator
8th International Particle Accelerator Conference, IPAC2017, CopenhagenCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19 Geneva : JACoW 6 pp. () [10.18429/JACoW-IPAC2017-MOXAA1]  GO
The European XFEL uses the world's largest superconducting RF installation to drive three independent SASE FELs. After eight years of construction the facility is now brought into operation. [...]
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