Home > Publications database > Development of Beam Halo Monitors for the European XFEL using radiation hard sensors and demonstration of the technology at FLASH > print

001     192556
005     20211110125527.0
024 7 _ |a 10.3204/DESY-THESIS-2015-016
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037 _ _ |a PUBDB-2014-04146
041 _ _ |a English
088 1 _ |a DESY-THESIS-2015-016
088 _ _ |a DESY-THESIS-2015-016
|2 DESY
100 1 _ |a Ignatenko, Alexandr
|b 0
|e Corresponding Author
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245 _ _ |a Development of Beam Halo Monitors for the European XFEL using radiation hard sensors and demonstration of the technology at FLASH
|f 2010-07-01 - 2014-04-14
260 _ _ |c 2015
|b Verlag Deutsches Elektronen-Synchrotron
300 _ _ |a 109
336 7 _ |a Output Types/Dissertation
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336 7 _ |a DISSERTATION
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336 7 _ |a PHDTHESIS
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336 7 _ |a Thesis
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336 7 _ |a Report
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336 7 _ |a Dissertation / PhD Thesis
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490 0 _ |a DESY-THESIS
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502 _ _ |a Brandenburgische Technische Universität Cottbus-Senftenberg, Diss., 2015
|c Brandenburgische Technische Universität Cottbus-Senftenberg
|b Dr.
|d 2015
520 _ _ |a The European X-Ray Free-Electron Laser (E-XFEL), currently under construction in Hamburg, Germany, is intended to be an international linear accelerator (linac) based user facility. Its electron beam can carry maximal average power of 600 kW. A beam with such a high power needs to be carefully transmitted through the machine and safely dumped after utilization. This is supported by various diagnostics tools. A Beam Halo Monitor (BHM) based on synthetic diamond and sapphire sensors has been designed. Diamond sensors are developed by the company element6 for the detection of ionizing radiation and used previously elsewhere. Sapphire sensors are in this thesis applied for the first time. The BHM concept has been applied already at the Free-electron Laser in Hamburg (FLASH). A module with four diamond and four sapphire sensors was designed, installed inside the beam pipe, commissioned, calibrated and has been successfully operated for 4 years. The system contributed significantly to safe and efficient operation of FLASH. Both types of the sensors for the BHM were characterized. Measurements of radiation tolerance are done in a 10 MeV electron beam for polycrystalline CVD (pCVD) diamond sensors for the first time up to a dose of 10 MGy and for sapphire sensors up to 5 MGy. The charge collection efficiency (CCE) drops as a function of the absorbed dose, is however still sufficient for application as a BHM. To improve a main sensor characteristic, the charge collection efficiency, for sapphire sensors the impurity concentration was reduced and different growth techniques were compared. Finally, charge collection efficiency of about 5 % for a bias voltage of 500 V was reached. The BHM concept for the XFEL is designed and in the construction phase.
536 _ _ |a 632 - Detector technology and systems (POF3-632)
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650 _ 7 |a Dissertation
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693 _ _ |a FLASH
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693 _ _ |a XFEL
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773 _ _ |y 2015
856 4 _ |y Restricted
856 4 _ |y OpenAccess
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910 1 _ |a Deutsches Elektronen-Synchrotron
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913 0 _ |a DE-HGF
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913 0 _ |a DE-HGF
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|v DESY-participation in XFEL
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914 1 _ |y 2014
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