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2017-11-29
18:27
OpenAccess [PUBDB-2017-12559] Talk (non-conference)

FLASH Status and Plans
Machine Advisory Committee, MAC, Meeting locationHamburg, DESY, Germany, 7 Nov 2017 - 8 Nov 20172017-11-072017-11-08  GO
FLASH status and plans are reported..
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2017-11-29
18:21
OpenAccess [PUBDB-2017-12558] Poster
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Double Pulse FEL Operation at FLASH
38th International Free Electron Laser Conference, FEL2017, Meeting locationSanta Fe, United States, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25  GO
The free-electron laser facility FLASH at DESY (Hamburg, Germany) is a user facility since 2005 providing high brilliance XUV and soft X-ray pulses. The facility runs 10 Hz bursts of hundreds of electron bunches, where the bunch distance in the burst is 1 us or more. [...]
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2017-11-29
18:17
[PUBDB-2017-12557] Poster
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Update on the Lifetime of Cs2Te Cathodes Operated at the FLASH Facility
38th International Free Electron Laser Conference, FEL2017, Meeting locationSanta Fe, United States, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25
The photoinjector of the free-electron laser facilityFLASH at DESY (Hamburg, Germany) uses Cs2Te photocathodes.We give an update on lifetime and quantumefficiency of cathodes operated at FLASH during the lastyears. At the time of the conference, cathode 73.3 has beenoperated with a record of 933 days with a stable quantumefficiency of in average 8.8 %..
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2017-11-29
18:03
[PUBDB-2017-12554] Contribution to a conference proceedings/Contribution to a book
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Update on the lifetime of Cs2Te cathodes operated at the FLASH facility
38th International Free Electron Laser Conference, FEL2017, Meeting locationSanta Fe, United States, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25 1 pp. (2017)
The photoinjector of the free-electron laser facility FLASH at DESY (Hamburg, Germany) uses Cs2Te photocathodes.We give an update on lifetime and quantumefficiency of cathodes operated at FLASH during the lastyears. At the time of the conference, cathode 73.3 has been operated with a record of 933 days with a stable quantum efficiency of in average 8.8 %..
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2017-11-29
17:52
OpenAccess [PUBDB-2017-12553] Conference Presentation (Invited)
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Recent FEL Experiments at FLASH
38th International Free Electron Laser Conference, FEL2017, Meeting locationSanta Fe, United States, 20 Aug 2017 - 25 Aug 20172017-08-202017-08-25  GO
The FLASH free-electron laser user facility at DESY(Hamburg, Germany) provides high brilliance SASE FEL radiation in the XUV and soft X-ray wavelength range.With the recent installation of a second undulator beamline(FLASH2), variable gap undulators are now available.They now allow various experiments not possible with theFLASH1 fixed gap undulators. We report on experiments on tapering, harmonic lasing, reverse tapering, frequency doubling at FLASH2 and experiments using double pulses for specific SASE and THz experiments at FLASH1..
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2017-11-29
17:42
[PUBDB-2017-12552] Contribution to a conference proceedings/Contribution to a book
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Experience with Multi-Beam and Multi-Beamline FEL-Operation
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19 2615-2617 (2017)
DESY’s free-electron laser FLASH provides soft X-raypulses for scientific users at wavelengths down to 4 nm simultaneously in two undulator beamlines. They are driven by a common linear superconducting accelerator with a beamenergy of up to 1.25 GeV. [...]
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2017-11-29
17:27
OpenAccess [PUBDB-2017-12551] Journal Article
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Experience with Multi-Beam and Multi-Beamline FEL-Operation
ddc:530
DESY’s free-electron laser FLASH provides soft X-ray pulses for scientific usersat wavelengths down to 4 nm simultaneously in two undulator beamlines. They are drivenby a common linear superconducting accelerator with a beam energy of up to 1.25 GeV. [...]
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2017-11-27
15:56
OpenAccess [PUBDB-2017-12401] Contribution to a conference proceedings
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Compton scattering techniques for the measurement of the transverse beam size of particle beams at future linear colliders
21st Beam Dynamics Workshop on Laser-Beam Interactions, Meeting locationState University of New York, Stony Brook, NY, USA, 11 Jun 2001 - 15 Jun 20012001-06-112001-06-15 6 pp. (2001) [10.3204/PUBDB-2017-12401]  GO
At several locations of the beam delivery system (BDS) of a future linear collider (FLC),beam spot sizes ranging from several hundreds to a fewmicrometers have to be measured.The large demagnification of the beam in the BDS and the high beam power puts extremeconditions on any measuring device. With conventional techniques at their operational limit inFLC scenarios, newmetho ds for the detection of the transverse beam size have to be developed.Laser based techniques are capable of measuring high power beams with sizes in the micrometerrange. [...]
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2017-11-16
08:35
OpenAccess [PUBDB-2017-12036] Conference Presentation
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FLASHForward P-9: An X-band transverse deflection cavity for femtosecond-scale longitudinal phase space diagnostics
3rd European Advanced Accelerator Concepts Workshop, EAAC 2017, Meeting locationLa Biodola, Isola d'Elba, Italy, 24 Sep 2017 - 30 Sep 20172017-09-242017-09-30  GO
The FLASHForward project at DESY is an innovative beam-driven plasma-wakefield acceleration experiment, aiming to accelerate electron beams to GeV energies over a few centimetres of ionised gas. These accelerated beams must be of sufficient quality to demonstrate exponential free-electron laser gain; achievable only through rigorous analysis of both the driver and witness beam's longitudinal phase space. [...]
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2017-11-13
14:41
OpenAccess [PUBDB-2017-11900] Poster
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Generation of Ultra-Short Electron Bunches and FEL Pulses and Characterization of their Longitudinal Properties at FLASH2
8th International Particle Accelerator Conference, IPAC17, Meeting locationCopenhagen, Denmark, 15 May 2017 - 19 May 20172017-05-152017-05-19  GO
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