Abstracts

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2022-12-15
14:26
[PUBDB-2022-07683] Abstract
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A bright future for new innovative and excellent opportunities for science at FLASH
14th International Particle Accelerator Conference, IPAC'23, VeniceVenice, Italy, 7 May 2023 - 12 May 20232023-05-072023-05-12  GO
The FLASH2020+ project will open up new excellent opportunities for science on the highest level. The FLASH facility will not only produce soft x-ray SASE photon beams at full MHz repetition rate in a burst mode in FLASH2, but will also provide in FLASH1 several thousand fully coherent pulses per second using the HGHG and EEHG external seeding schemes. [...]

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2022-12-13
16:33
[PUBDB-2022-07585] Abstract
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Virtual Photon Pulse Characterisation Using Machine Learning Methods
14th International Particle Accelerator Conference, IPAC'23, VeniceVenice, Italy, 7 May 2023 - 12 May 20232023-05-072023-05-12  GO
The use of fast computational tools is important in the operation of X-ray free electron lasers, in order to predict the output of diagnostics when they are either destructive or unavailable. Physics-based simulations can be computationally intensive to provide estimates on a real-time basis. [...]

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2022-12-07
10:38
[PUBDB-2022-07378] Abstract
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Surface Characterization of Mid-T Treated Nb Samples to Investigate the Origin of Residual Resistance
14th International Particle Accelerator Conference, IPAC'23, VeniceVenice, Italy, 7 May 2023 - 12 May 20232023-05-072023-05-12  GO
Annealing of niobium (Nb) cavities in UHV is crucial for the performance in the later cryogenic tests and operation. Recently, a so-called “mid-T bake” treatment has exhibited very high-quality factors for Nb cavities. [...]

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2022-12-02
17:17
[PUBDB-2022-07288] Abstract
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Optimization of Klystron Drive Signal and HV Shape to Reduce Energy Consumption during Operation of the European XFEL
14th International Particle Accelerator Conference, IPAC'23, VeniceVenice, Italy, 7 May 2023 - 12 May 20232023-05-072023-05-12  GO
Currently 26 RF stations are in operation at the European X-ray Free Electron Laser (XFEL) and all RF stations can deliver sufficient power to support 600 µs beam pulse with an energy up to 17 GeV. These beam parameters require a power consumption of about 4.9 MW for high-power RF. [...]

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2022-11-16
10:11
[PUBDB-2022-06737] Abstract
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Tunable isolated attosecond pulse generation by sub-cycle synthesized waveforms
European Conference on the Dynamics of Molecular Systems, MOLEC 2022, HamburgHamburg, Germany, 21 Aug 2022 - 26 Aug 20222022-08-212022-08-26  GO
The future development of attosecond science will largely depend on the availability of better attosecond pulsesources. In particular, the current generation of laser-based attosecond sources suffers from a low photon-flux,especially in the soft X-ray region, and a limited tunability of attosecond pulse parameters, such as its centralenergy, bandwidth and consequently pulse duration, from a single source. [...]

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2022-09-15
17:33
[PUBDB-2022-04795] Abstract
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Status of Data-Driven Beam Trajectory Anomaly Detection at European XFEL
3rd ICFA Beam Dynamics Mini-Workshop on Machine Learning Applications for Particle Accelerators, ChicagoChicago, USA, 1 Nov 2022 - 4 Nov 20222022-11-012022-11-04  GO
An accurate assessment of beam orbits is a reliable characteristic of operations at SASE beamlines at European XFEL. The current availability of hardware for data-driven models like GPUs enabled to deploy models which are capable of handling enormous throughput of data provide tools for more sophisticated analysis of current operations with state-of-the-art machine learning models. [...]

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2022-07-01
14:36
[PUBDB-2022-03237] Abstract
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Controller Latency Improvements at REGAE
Low Level RF Workshop 2022, WindischWindisch, Switzerland, 9 Oct 2022 - 13 Oct 20222022-10-092022-10-13  GO
REGAE is a facility for ultrafast electron diffraction (UED) experiments based on a normal conducting S-band gun and buncher cavity. Their RF regulation is performed by a single cavity controller, implemented by an FPGA firmware and operating at 125 MHz. [...]
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2022-05-07
20:59
[PUBDB-2022-02515] Abstract
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Machine Learning for Detection of Anomalies on Klystrons at the European XFEL
31st Linear Accelerator Conference, LINAC2022, LiverpoolLiverpool, UK, 29 Aug 2022 - 2 Sep 20222022-08-292022-09-02  GO
High-power multi-beam klystrons represent a key component to amplify the acceleration field of the radio frequency superconducting (SRF) cavities at European XFEL. Exchanging these high-power components takes time and effort, thus it is necessary to minimize maintenance and down times and at the same time maximize the device operation. [...]

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2020-08-10
13:13
[PUBDB-2020-02965] Abstract
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Giant supramolecules as molecular containers
European Crystallographic Meeting 2019, ECM 2019, ViennaVienna, Austria, 18 Aug 2019 - 23 Aug 20192019-08-182019-08-23 () [10.1107/S2053273319090259]  GO
One of the most outstanding areas in the modern coordination chemistry is the rational design of giantsupramolecules built up from metal ions connected to each other via polytopic ligands resulting in large hollowcages. The systematic approach to the synthesis of hollow supramolecules developed in our group is thecoordination of Cu+ and Ag+ cations to phosphorus atoms of the pentaphosphaferrocenes, [CpRFe(hapta5-P5)] (CpR=hapta5-C5R5, R=Me (Cp*), CH2Ph (CpBn), etc.) [1-3]. [...]
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2020-08-10
13:07
[PUBDB-2020-02964] Abstract
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Phosphorus can do more: $\pi–\pi$ stacking of planar aromatic P5-rings
European Crystallographic Meeting 2019, ECM 2019, ViennaVienna, Austria, 18 Aug 2019 - 23 Aug 20192019-08-182019-08-23 () [10.1107/S205327331909065X]  GO
The directed non-bonding interactions play an important role in modern supramolecular chemistry. Concerningphosphorus, so-called pnictogen bonding is usually mentioned in this context [1] [...]
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