IBIC2017 - List of Authors (Yan, M.)

Paper	Title	Page
TUPCC03	Online Longitudinal Bunch Profile and Slice Emittance Diagnostics at the European XFEL	153
	C. Gerth, B. Beutner, O. Hensler, F. Obier, M. Scholz, M. Yan DESY, Hamburg, Germany
	The longitudinal current profile and slice emittance are important bunch parameters for the operation of an X-ray free-electron laser. At the European XFEL, dedicated diagnostic sections equipped with transverse deflecting RF structures (TDS) have been installed for the control and optimisation of these parameters. Travelling-wave TDS in combination with fast kicker magnets and off-axis screens allow for the study of individual bunches without affecting the other bunches in the super-conducting linear accelerator which can generate bunch trains of up to 2700 bunches at 4.5 MHz within 600 microsecond RF pulses at a repetition rate of 10 Hz. The measurement of the slice emittance is realised in a static F0D0 lattice equipped with four individual screen stations. Variations of the longitudinal bunch profile or slice emittance along the bunch train may lead to degraded FEL performance for parts of the train which reduces the effective available number of bunches for FEL operation. By gradually adjusting the timing, individual bunches along the bunch train can be measured in order to optimise the overall beam parameters for all bunches in the train.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCC03
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TU2AB3	Single-Shot Longitudinal Beam Profile and Terahertz Diagnostics at MHz - Towards GHz-Rates with High-Throughput Electronics	136
	M. Caselle, B.M. Balzer, M. Brosi, E. Bründermann, S. Funkner, B. Kehrer, A.-S. Müller, M.J. Nasse, G. Niehues, M.M. Patil, L. Rota, M. Schuh, P. Schönfeldt, J.L. Steinmann, M. Weber, M. Yan KIT, Eggenstein-Leopoldshafen, Germany G. BORGHI,, M. Boscardin, S. Ronchin FBK, Trento, Italy
	Accelerators with high bunch-repetition rates mandate high-throughput detector electronics to diagnose each individual bunch. KALYPSO with a 256-pixel detector line-array integrated in an fs laser-based electro-optical set-up allows longitudinal bunch profiling with sub-ps resolution as demonstrated at the storage ring ANKA for single-bunch mode operation at 2.7 MHz and also at the Eu-XFEL with a 4.5-MHz micro-bunch train. Improvements will enhance fs-time accuracy, reduce noise, and increase frame-rate. A custom front-end with an application-specific integrated circuit (ASIC) has been developed to operate with 10-MHz frame-rates at low noise. Several linear arrays with up to 1024 pixel and smaller pixel pitch were submitted for production. The development of a low-gain avalanche diode (LGAD) sensor will further improve the time resolution. Detector data is transmitted in the DAQ framework to external GPU-based clusters and processed in real-time at 7 Gbytes/s with a few μs latency. For beam dynamics studies we also develop KAPTURE capable to analyze terahertz detector pulses at GHz-repetition rates. These developments open new windows in beam diagnostics of modern accelerators.
	Slides TU2AB3 [1.906 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TU2AB3
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TUPCC16	Status of the THz Streaking Experiment with Split Ring Resonators at FLUTE	186
	V. Schlott, M.M. Dehler, R. Ischebeck, M. Moser PSI, Villigen PSI, Switzerland E. Bründermann, S. Funkner, A.-S. Müller, M.J. Nasse, G. Niehues, R. Ruprecht, T. Schmelzer, M. Schuh, M. Schwarz, M. Yan KIT, Karlsruhe, Germany T. Feurer, M. Hayati, Z. Ollmann, R. Tarkeshian Universität Bern, Institute of Applied Physics, Bern, Switzerland
	THz streaking with split ring resonators (SRR) promise ultra-high (sub-femtosecond) temporal resolution even for relativistic electron bunches. A proof-of-principle experiment in collaboration between the University of Bern, the Paul Scherrer Institute (PSI) and the Karlsruhe Institute of Technology (KIT) is currently prepared at the FLUTE facility (Ferninfrarot Linac und Test Experiment) at KIT. Most of the critical components have been designed, tested and set-up in the 7 MeV diagnostics part of FLUTE. In this contribution we will present an update on the experimental set-up and report on SRR configurations which have been optimized for highest THz deflection, while simultaneously accounting for the restrictions of the manufacturing process. Test measurements characterizing the SRR samples and the THz source, which has been matched to the FLUTE gun laser, will also be presented.
	Poster TUPCC16 [0.539 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCC16
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Paper

Title

Page

Online Longitudinal Bunch Profile and Slice Emittance Diagnostics at the European XFEL

153

C. Gerth, B. Beutner, O. Hensler, F. Obier, M. Scholz, M. Yan
DESY, Hamburg, Germany

The longitudinal current profile and slice emittance are important bunch parameters for the operation of an X-ray free-electron laser. At the European XFEL, dedicated diagnostic sections equipped with transverse deflecting RF structures (TDS) have been installed for the control and optimisation of these parameters. Travelling-wave TDS in combination with fast kicker magnets and off-axis screens allow for the study of individual bunches without affecting the other bunches in the super-conducting linear accelerator which can generate bunch trains of up to 2700 bunches at 4.5 MHz within 600 microsecond RF pulses at a repetition rate of 10 Hz. The measurement of the slice emittance is realised in a static F0D0 lattice equipped with four individual screen stations. Variations of the longitudinal bunch profile or slice emittance along the bunch train may lead to degraded FEL performance for parts of the train which reduces the effective available number of bunches for FEL operation. By gradually adjusting the timing, individual bunches along the bunch train can be measured in order to optimise the overall beam parameters for all bunches in the train.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCC03

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TU2AB3

Single-Shot Longitudinal Beam Profile and Terahertz Diagnostics at MHz - Towards GHz-Rates with High-Throughput Electronics

136

M. Caselle, B.M. Balzer, M. Brosi, E. Bründermann, S. Funkner, B. Kehrer, A.-S. Müller, M.J. Nasse, G. Niehues, M.M. Patil, L. Rota, M. Schuh, P. Schönfeldt, J.L. Steinmann, M. Weber, M. Yan
KIT, Eggenstein-Leopoldshafen, Germany
G. BORGHI,, M. Boscardin, S. Ronchin
FBK, Trento, Italy

Accelerators with high bunch-repetition rates mandate high-throughput detector electronics to diagnose each individual bunch. KALYPSO with a 256-pixel detector line-array integrated in an fs laser-based electro-optical set-up allows longitudinal bunch profiling with sub-ps resolution as demonstrated at the storage ring ANKA for single-bunch mode operation at 2.7 MHz and also at the Eu-XFEL with a 4.5-MHz micro-bunch train. Improvements will enhance fs-time accuracy, reduce noise, and increase frame-rate. A custom front-end with an application-specific integrated circuit (ASIC) has been developed to operate with 10-MHz frame-rates at low noise. Several linear arrays with up to 1024 pixel and smaller pixel pitch were submitted for production. The development of a low-gain avalanche diode (LGAD) sensor will further improve the time resolution. Detector data is transmitted in the DAQ framework to external GPU-based clusters and processed in real-time at 7 Gbytes/s with a few μs latency. For beam dynamics studies we also develop KAPTURE capable to analyze terahertz detector pulses at GHz-repetition rates. These developments open new windows in beam diagnostics of modern accelerators.

Slides TU2AB3 [1.906 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TU2AB3

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPCC16

Status of the THz Streaking Experiment with Split Ring Resonators at FLUTE

186

V. Schlott, M.M. Dehler, R. Ischebeck, M. Moser
PSI, Villigen PSI, Switzerland
E. Bründermann, S. Funkner, A.-S. Müller, M.J. Nasse, G. Niehues, R. Ruprecht, T. Schmelzer, M. Schuh, M. Schwarz, M. Yan
KIT, Karlsruhe, Germany
T. Feurer, M. Hayati, Z. Ollmann, R. Tarkeshian
Universität Bern, Institute of Applied Physics, Bern, Switzerland

THz streaking with split ring resonators (SRR) promise ultra-high (sub-femtosecond) temporal resolution even for relativistic electron bunches. A proof-of-principle experiment in collaboration between the University of Bern, the Paul Scherrer Institute (PSI) and the Karlsruhe Institute of Technology (KIT) is currently prepared at the FLUTE facility (Ferninfrarot Linac und Test Experiment) at KIT. Most of the critical components have been designed, tested and set-up in the 7 MeV diagnostics part of FLUTE. In this contribution we will present an update on the experimental set-up and report on SRR configurations which have been optimized for highest THz deflection, while simultaneously accounting for the restrictions of the manufacturing process. Test measurements characterizing the SRR samples and the THz source, which has been matched to the FLUTE gun laser, will also be presented.

Poster TUPCC16 [0.539 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCC16

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)