CFEL-ACC

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2019-12-31
17:22
OpenAccess [PUBDB-2019-05693] Contribution to a conference proceedings
et al
Experimental Test of Longitudinal Space-Charge Amplifier in Optical Range
10th International Particle Accelerator Conference, IPAC 2019, MelbourneMelbourne, Australia, 19 May 2019 - 24 May 20192019-05-192019-05-24 JACoW Publishing, Geneva, Switzerland 3267-3270 () [10.18429/JACOW-IPAC2019-WEPTS061]  GO
Longitudinal space-charge effects can act as a driver for short wavelength radiation production in a longitudinal space-charge amplifier (LSCA) *. A single cascade of an LSCA was tested using the hardware of the sFLASH experiment installed at the FEL user facility FLASH (at DESY, Hamburg). [...]
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2019-12-31
17:14
OpenAccess [PUBDB-2019-05692] Contribution to a conference proceedings
et al
Simulation Studies for a EEHG seeded FEL in the XUV
10th International Particle Accelerator Conference, IPAC 2019, MelbourneMelbourne, Australia, 19 May 2019 - 24 May 20192019-05-192019-05-24 JACoW Publishing, Geneva, Switzerland 1705-1708 () [10.18429/JACOW-IPAC2019-TUPRB013]  GO
Echo-enabled harmonic generation (EEHG) is a promising technique for seeded free electron lasers (FELs) not only to go down to wavelengths of 4 nm, but also to simplify the schemes that are currently used to achieve a similar wavelength range (double cascade HGHG). Thus a study optimizing the EEHG performance in the wavelength range from 60 to §I{4}{nm} has been performed. [...]
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2019-12-31
16:58
OpenAccess [PUBDB-2019-05691] Contribution to a conference proceedings
et al
High-Repetition-Rate Seeding Schemes Using a Resonator-Amplifier Setup
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 222-225 () [10.18429/JACOW-FEL2019-TUP073]  GO
The spectral and temporal properties of Free-Electron Lasers (FEL) operating on the basis of self-amplified spontaneous emission (SASE) suffer from the stochastic behavior of the start-up process. Several so-called 'seeding'-techniques using external radiation fields to overcome this limitation have been proposed and demonstrated. [...]
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2019-12-31
16:49
OpenAccess [PUBDB-2019-05690] Contribution to a conference proceedings
et al
Impact of Electron Beam Energy Chirp on Seeded FELs
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 238-241 () [10.18429/JACOW-FEL2019-TUP078]  GO
Seeded FELs enable the generation of fully coherent, transform-limited and high brightness FEL pulses, as the start-up process is driven by an external coherent light pulse. During the design process of such FELs, it is important to choose carefully the electron beam parameters to guarantee high performance. [...]
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2019-12-31
16:44
OpenAccess [PUBDB-2019-05689] Contribution to a conference proceedings
et al
Study of a Seeded Oscillator-Amplifier FEL
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 234-237 () [10.18429/JACOW-FEL2019-TUP077]  GO
In recent years, there is interest of the Free-Electron Laser (FEL) community in external-seeding techniques such as the Echo-Enabled Harmonic Generation (EEHG) and the High-Gain Harmonic Generation (HGHG). With these techniques, pulses of an improved temporal coherence are generated, but at the same time, they are limited by the repetition rates that seed lasers can currently offer with the required pulse energies. [...]
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2019-11-27
16:53
OpenAccess [PUBDB-2019-04550] Contribution to a conference proceedings/Contribution to a book
et al
Nitrogen Infusion Sample R at DESY
19th International Conference on RF Superconductivity, DresdenDresden, Germany, 30 Jun 2019 - 5 Jul 20192019-06-302019-07-05 JACoW Publishing, Geneva, Switzerland 77-82 () [10.18429/JACOW-SRF2019-MOP023]  GO
The European XFEL continuous wave upgrade requires cavities with reduced surface resistance (high Q-values) for high duty cycle while maintaining high accelerating gradient for short-pulse operation. A possible way to meet the requirements is the so-called nitrogen infusion procedure. [...]
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2019-10-30
14:08
[PUBDB-2019-03819] Contribution to a conference proceedings
et al
FLASH Upgrad for Seeding
39th International Free-Electron Laser Conference, FEL2019, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 Hamburg 1-3 ()
An upgrade for FLASH, the SASE FEL in Hamburg, is planned after 2020 aiming at fulfilling user requirements like fully coherent, variable polarization, and multi-colour pulses. In this proceeding, we focus on the FLASH1 beamline that will be operated in seeded mode at a high repetition rate. [...]
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2019-03-13
19:56
[PUBDB-2019-01513] Bachelor Thesis
et al
Untersuchung der Magnetoptik für Harmonisches Seeding am Freien-Elektronen-Laser FLASH bei sFLASH
37 pp. () = Bachelorarbeit, University of Hamburg, 2019

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2018-12-10
15:36
[PUBDB-2018-05362] Book/Report/Internal Report

Positron source considerations for TESLA
[TESLA Report 1993-21]
TESLA Reports 12 pp. ()
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2018-12-10
09:02
[PUBDB-2018-05305] Book/Report/Internal Report

On the upper limit of the RMS energy width due to beamstrahlung and its numerical simulation
[TESLA Report 1994-06]
TESLA Reports 5 pp. ()
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