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2019-04-25
14:36
[PUBDB-2019-02075] Report/Internal Report
et al
RadCon a real-time Gamma Dosimeter for XFEL using PIN-Diode-Sensors
[DESY-Technical-Note-19-01]
13 pp. ()
A new little inexpensive real-time Gamma-Dosimeter is presented, which can monitor the gamma dose rate very acurately in the range of 0 – 2 mSv/d even for the pulsed time structure of the XFEL operation, and which can be readout remotely via a conventional USB connection. It is proposed to measure the dose and dose rates inside the electronic racks installed in the XFEL main linac tunnel. [...]
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2019-04-08
14:56
OpenAccess [PUBDB-2019-01904] Conference Presentation

Summary of the Maximum SCRF Voltage in XFEL
Tesla Technology Collaboration Meeting 2019, TTC Meeting, VancouverVancouver, Canada, 5 Feb 2019 - 8 Feb 20192019-02-052019-02-08  GO
In this presentation, we will provide an overview of the maximum obtained voltage performance of each RF station in the XFEL, quantifying the observed differences and limitations as compared to the expected performance based on single module tests at AMTF. We will also briefly discuss operations experience affecting maximum voltage and future study directions..
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2019-04-03
15:08
OpenAccess [PUBDB-2019-01849] Conference Presentation

TTC 2019 – WG1 summary
TESLA Technology Collaboration Meeting, TTC Meeting, VancouverVancouver, Canada, 5 Feb 2019 - 8 Feb 20192019-02-052019-02-08  GO
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2018-12-14
11:54
OpenAccess [PUBDB-2018-05472] Contribution to a conference proceedings
et al
Phase Drift Compensating RF Link for Femtosecond Synchronization of E-XFEL
21st IEEE Real Time Conference, RT2018, Colonial WilliamsburgColonial Williamsburg, USA, 9 Jun 2018 - 15 Jun 20182018-06-092018-06-15 6 pp. () [10.3204/PUBDB-2018-05472]  GO
Modern high-energy particle accelerators and Free-Electron Lasers incorporate large quantities of sensitive RF and microwave frequency devices distributed over kilometer distances. Such devices require extreme stable phase and time synchronization by means of high frequency signal distributed along the accelerator facility. [...]
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2018-12-14
10:45
[PUBDB-2018-05465] Journal Article
et al
Real-time Iterative Learning Control - Two Applications with Time Scales between Years and Nanoseconds
Iterative learning control (ILC) is a family of digital control concepts, which can be used for a large variety of different applications. Each application has its own properties like sampling time and storage needs. [...]
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ddc:510
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2018-12-11
12:23
OpenAccess [PUBDB-2018-05399] Contribution to a conference proceedings/Contribution to a book

Progress on Multibunch FEL Performance at FLASH
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Geneva, Switzerland : JACoW Publishing 1452-1455 () [10.18429/JACOW-IPAC2018-TUPMF080]  GO
At the SASE-FEL user facility FLASH, superconducting TESLA-type cavities are used for acceleration. The high achievable duty cycle allows for operating with long bunch-trains, hence considerably increasing the efficiency of the machine. [...]
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2018-12-11
12:12
OpenAccess [PUBDB-2018-05398] Contribution to a conference proceedings
et al
Anomaly Detection for Cavity Signals - Results from the European XFEL
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Geneva, Switzerland : JACoW Publishing 2502-2504 () [10.18429/JACOW-IPAC2018-WEPMF058]  GO
The data throughput of the European XFEL DAQ is about 1.5 Gb/s. Data depicting the cavity signal behavior is currently only saved manually. [...]
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2018-12-07
11:46
OpenAccess [PUBDB-2018-05296] Contribution to a conference proceedings
et al
Real-Time Redundancy for the 1.3 GHz Master Oscillator of the European-XFEL
21st IEEE Real Time Conference, RT2018, Colonial WilliamsburgColonial Williamsburg, USA, 9 Jun 2018 - 15 Jun 20182018-06-092018-06-15 18 pp. () [10.3204/PUBDB-2018-05296]  GO
Many modern large-scale facilities, like European X-ray Free Electron Laser (E-XFEL), require precise synchronisation, often down to femtosecond level. Even a very short interruption or an excessive glitch in the reference signal might break the precise time relations between subsystems. [...]
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2018-12-04
13:09
OpenAccess [PUBDB-2018-05183] Contribution to a conference proceedings/Contribution to a book
et al
Status of the Polarix-TDS Project
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Geneva, Switzerland : JACoW Publishing 3808-3811 () [10.18429/JACOW-IPAC2018-THPAL068]  GO
A collaboration between DESY, PSI and CERN has been established to develop and build an advanced modular X-band transverse deflection structure (TDS) system with the new feature of providing variable polarization of the deflecting force. This innovative CERN design requires very high manufacturing precision to guarantee highest azimuthal symmetry of the structure to avoid the deterioration of the polarization of the streaking field. [...]
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2018-12-04
12:57
OpenAccess [PUBDB-2018-05182] Contribution to a conference proceedings/Contribution to a book
et al
Design and Status of the MicroTCA.4 Based LLRF System for TARLA, Geneva, Switzerland
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Geneva, Switzerland : JACoW Publishing 2490-2492 () [10.18429/JACOW-IPAC2018-WEPMF054]  GO
The Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) is constructing a 40 MeV Free Electron Laser with continuous wave (CW) RF operation. In order to control and monitor the four superconducting (SC) TESLA type cavities as well as the two normal conducting (NC) buncher cavities, a MicroTCA.4 based LLRF system is foreseen. [...]
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