FS-CFEL-2

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2018-09-12
11:24
OpenAccess [PUBDB-2018-03456] Journal Article
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Design strategies for single-cycle ultrafast electron guns
After the first introduction of ultrafast electron guns for acceleration of particles using single-cycle electro-magnetic pulses, the basic structure has gained increasing interest as promising solutions for high gradient compact electron guns. The significant benefit of using transient ultrashort pulses in this acceleration scheme opens a realistic path towards gigavolt-per-meter acceleration gradients. [...]
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2018-09-11
14:55
[PUBDB-2018-03449] Contribution to a conference proceedings/Contribution to a book

THz Driven Accelerators
The 9th International Symposium on Ultrafast Phenomena and Terahertz Waves : [Proceedings] - OSA Washington, D.C., 2018. - ISBN 978-0-9600380-8-4 - doi:10.1364/ISUPTW.2018.ThC1
International Symposium on Ultrafast Phenomena and Terahertz Waves, ISUPTW, Changsha, HunanChangsha, Hunan, China, 23 Apr 2018 - 26 Apr 20182018-04-232018-04-26
Washington, D.C. : OSA ThC1 () [10.1364/ISUPTW.2018.ThC1]  GO
High-energy THz pulse generation and approaches towards linear THz accelerators are discussed and demonstrated. First results from THz guns and accelerators are shown and concepts for compact X-ray sources based on these devices are presented..
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2018-09-11
08:59
[PUBDB-2018-03426] Master Thesis
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Characterization of laser to RF ynthesis and synchronization techniques
Hamburg 100 pp. () = Masterarbeit, Technische Universität Hamburg-Harburg, 2018
High-precision and low noise time transfer between a master clock and slave sources has become essential for numerous scientific applications in the latest decades. This is, from the comparison of different optical clocks around the world, to high sensitivity imaging of astronomical objects using multi-telescope arrays and to next generation photon science facilities such as X-ray free-electron lasers (FELs). [...]

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2018-09-05
13:26
OpenAccess [PUBDB-2018-03392] Conference Presentation
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Cascaded regime of optical parametric amplification for efficient terahertz generation
82. Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion Atome, Moleküle, Quantenoptik und Plasmen, DPG-SAMOP, ErlangenErlangen, Germany, 4 Mar 2018 - 9 Mar 20182018-03-042018-03-09  GO
The efficient generation of multi-cycle coherent THz radiation is ofprimary importance to drive novel table-top FELs. We explore thecascaded OPA, a new regime of OPA. [...]
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2018-09-05
13:21
OpenAccess [PUBDB-2018-03391] Conference Presentation
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Optimized pulse characterization from UV to IR by twodimensional spectral shearing interferometry (2DSI)
82. Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion Atome, Moleküle, Quantenoptik und Plasmen, DPG-SAMOP, ErlangenErlangen, Germany, 4 Mar 2018 - 9 Mar 20182018-03-042018-03-09  GO
To manipulate electronic dynamics in their inherent time scale, ultrashortlaser sources delivering pulse durations below one optical cycleare being developed. Pulse characterization methods have to keeppace with the ultrabroad bandwidth of sub-cycle pulses. [...]
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2018-09-05
13:16
OpenAccess [PUBDB-2018-03390] Conference Presentation
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Sub-Cycle Optical Parametric Synthesizer
82. Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion Atome, Moleküle, Quantenoptik und Plasmen, DPG-SAMOP, ErlangenErlangen, Germany, 4 Mar 2018 - 9 Mar 20182018-03-042018-03-09  GO
Coherent light-field synthesis is a promising route to scale the bandwidthof optical parametric amplifiers beyond one octave. Our visionis to create custom-tailored sub-cycle optical waveforms opening upunprecedented prospects for precision control of strong-field interactions,for the generation of intense isolated attosecond pulses and forattosecond pump-probe spectroscopy. [...]
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2018-08-30
14:03
[PUBDB-2018-03281] Contribution to a conference proceedings/Contribution to a book
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Segmented Terahertz Driven Device for Electron Acceleration
9th International Particle Accelerator Conference, IPAC 2018, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Geneva : JACoW Publishing 1642-1644 () [10.18429/JACOW-IPAC2018-TUPML045]  GO
We present a segmented THz based device (STEAM) capable of performing multiple high-field operations on the 6D-phase-space of ultrashort electron bunches. Using only a few microjoules of single-cycle THz radiation, we have shown record THz-based acceleration of >30 keV of an incoming 55keV electron beam, with a peak acceleration field gradient of around 70 MV/m that is comparable with that from a conventional RF accelerator. [...]
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2018-08-30
13:53
OpenAccess [PUBDB-2018-03279] Contribution to a conference proceedings/Contribution to a book
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Characterization of Polarization-Dependent Emittance From an Array of Au Nanorods using Velocity Map Imaging Spectrometer
9th International Particle Accelerator Conference, IPAC 2018, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Geneva : JACoW Publishing 1612-1614 () [10.18429/JACOW-IPAC2018-TUPML031]  GO
Electron beams of high quality, e.g., low emittance, are of crucial importance for cutting-edge scientific instruments, such as x-ray free electron lasers (XFELs) and ultrafast electron diffraction (UED) setups. A velocity-map-imaging (VMI) spectrometer was implemented to characterize the intrinsic root-mean-square (rms) normalized emittance from photocathodes. [...]
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2018-08-30
13:45
OpenAccess [PUBDB-2018-03278] Contribution to a conference proceedings/Contribution to a book
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Commissioning and Long-Term Results of a Fully-Automated Pulse-Based Optical Timing Distribution System at Dalian Coherent Light Source
9th International Particle Accelerator Conference, IPAC 2018, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 Geneva : JACoW Publishing 1909-1911 () [10.18429/JACOW-IPAC2018-WEPAF043]  GO
New generation light sources such as X-ray free-electron lasers* and attoscience centers** require high demand for timing synchronization, on the order of few femtoseconds or below, to generate ultrashort X-ray pulses that enables attosecond temporal and subatomic spatial resolution. The challenge in achieving this scientific dream lies in part in a reliable, high-precision timing distribution system that can synchronize various optical and microwave sources across multi-km distances with good long-term stability. [...]
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2018-08-16
14:02
OpenAccess [PUBDB-2018-02981] Journal Article
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Tunable, Ultrafast Fiber-Laser Between 1.15 and 1.35 $\mu$m for Harmonic Generation Microscopy in Human Skin
We demonstrate a fiber-optic ultrafast tunable source for harmonic generation microscopy (HGM) in human skin. The source is based on a 31-MHz Er-fiber laser followed byself-phase modulation enabled spectral selection (SESS). [...]
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