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2017-06-06
14:48
OpenAccess [PUBDB-2017-04356] Contribution to a conference proceedings
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Linear and Nonlinear Optics Analysis from Multiturn Data at PETRA III
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19
4 p. (2017) [10.3204/PUBDB-2017-04356]  GO
At Petra III measuring multiturn beam response to pulsed and continuous excitations allows linear and nonlinear (e.g. frequency maps) optics parameter determination. [...]
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2017-05-01
22:44
OpenAccess [PUBDB-2017-02117] Book/Report/Dissertation / PhD Thesis
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Laser-to-RF Phase Detection with Femtosecond Precision for Remote Reference Phase Stabilization in Particle Accelerators
[DESY-THESIS-2017-016]
DESY-THESIS 174 pp. (2017) [10.3204/PUBDB-2017-02117] = Technische Universität Hamburg Harburg, Diss., 2016  GO
The invention of a femtosecond stable Laser-to-RF phase detector allows to measure with femtosecond precision the relative phase between a phase stable optical reference and an RF signal. Thereby one can stabilize RF reference signals in modern FELs on a femtosecond scale. [...]
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2017-04-12
10:21
OpenAccess [PUBDB-2017-01661] Journal Article
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Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser
ddc:530
In pump-probe experiments employing a free-electron laser (FEL) in combination with a synchronized optical femtosecond laser, the arrival-time jitter between the FEL pulse and the optical laser pulse often severely limits the temporal resolution that can be achieved. Here, we present a pump-probe experiment on the UV-induced dissociation of 2,6-difluoroiodobenzene $(C_{6}H_{3}F_{2}I)$ molecules performed at the FLASH FEL that takes advantage of recent upgrades of the FLASH timing and synchronization system to obtain high-quality data that are not limited by the FEL arrival-time jitter. [...]
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2017-01-02
10:35
OpenAccess [PUBDB-2017-00011] Conference Presentation
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High Voltage Power Module Pluggable to NAT RTM Power Supply Carrier
5th MicroTCA workshop for industry and research, Meeting locationHamburg, Germany, 7 Dec 2016 - 8 Dec 20162016-12-072016-12-08
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In the paper we want to present High Voltage Power Module (HVPM) pluggable to Micro Telecommunication Computing Architecture generation four (MTCA.4) based Rear Transition Module (RTM) Power Supply Carrier (PSC) and its possible applications. The idea is to have a possiblity to power supply RTM cards that demands specific voltages above 12VDC. [...]
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2016-12-20
15:54
OpenAccess [PUBDB-2016-06461] Poster
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ChimeraTK: A Toolkit for Modular Control Applications
11th International Workshop on Personal Computers and Particle Accelerator Controls, PCaPAC 2016, Meeting locationCampinas, Brazil, 25 Oct 2016 - 28 Oct 20162016-10-252016-10-28
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The DESY ChimeraTK (formerly called MTCA4U) is a collection of C++ libraries which facilitate the development of control applications. Special importance has been placed on abstraction from communication layers to simplify writing applications in heterogenous environments or reusing applications in a different facility. [...]
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2016-12-15
17:04
OpenAccess [PUBDB-2016-06264] Conference Presentation
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Model Based Fast Protection System for High Power RF Tube Amplifiers Used at European XFEL Accelerator
20th IEEE-NPSS Real Time Conference, RT2016, Meeting locationPadua, Italy, 5 Jun 2016 - 10 Jun 20162016-06-052016-06-10
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The driving engine of the superconducting accelerator of the European X-ray Free-Electron Laser (XFEL) are 27 Radio Frequency (RF) stations. Each of an underground RF station consists from multi-beam horizontal klystron which can provide up to 10MW of power at 1.3GHz. [...]
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2016-12-14
13:50
OpenAccess [PUBDB-2016-06156] Conference Presentation

LLRF System Installation for the European XFEL
5th MicroTCA workshop for industry and research, Meeting locationHamburg, Germany, 7 Dec 2016 - 8 Dec 20162016-12-072016-12-08
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This contribution presents an overview of the complete low level radio frequency system (LLRF) installation in the European x-ray free electron laser (E-XFEL). The focus is on the MicroTCA.4-based LLRF system architecture, testing and preliminary results. [...]
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2016-12-09
10:59
OpenAccess [PUBDB-2016-06055] Contribution to a conference proceedings

MicroTCA.4 Usage in the Femtosecond-Synchronization System at European XFEL - Enabling the XFEL for Femtosecond Precision User Experiments
5th MicroTCA workshop for industry and research, Meeting locationHamburg, Germany, 7 Dec 2016 - 8 Dec 20162016-12-072016-12-08
1-42 (2016) [10.3204/PUBDB-2016-06055]  GO
The optical synchronization system at the European XFEL serves as femtosecond-stable reference throughout the 3.5 km long facility. Its signal is essential for the pump-probe experiments, first by enabling the LLRF system to stabilize the the electron bunch arrival time and thereby the FEL X-ray pulse timing, and second by synchronizing the experimental laser to fs precision. [...]
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2016-12-08
12:03
OpenAccess [PUBDB-2016-06014] Contribution to a conference proceedings
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Self-Organzied Critical Control for the European XFEL Using Black Box Parameter Identification for the Quench Detection System
3rd Conference on Control and Fault-Tolerant Systems, SysTol’16, Meeting locationBarcelona, Spain, 7 Sep 2016 - 9 Sep 20162016-09-072016-09-09
196-201 (2016) [10.3204/PUBDB-2016-06014]  GO
The European Free Electron Laser (XFEL) consists of a large and complex plant, with many cost intensive and technological high-end components. It is therefore important that the XFEL can be operated reliably and safely using exception handling and fault detection systems. [...]
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2016-12-05
15:09
OpenAccess [PUBDB-2016-05889] Contribution to a conference proceedings
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Implementing a ReboT Server on a Microblaze
20th IEEE-NPSS Real Time Conference, RT2016, Meeting locationPadua, Italy, 5 Jun 2016 - 10 Jun 20162016-06-052016-06-10
1-3 (2016) [10.3204/PUBDB-2016-05889]  GO
Data acquisition over an IP network is convenient for diagnostics, monitoring and control applications. The ReboT protocol (Register Based Access Over TCP) extends the MTCA4U deviceaccess framework, letting it access supported hardware over TCP/IP. [...]
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