FLA

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2018-05-17
14:42
OpenAccess [PUBDB-2018-01987] Contribution to a conference proceedings
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Simulations of 3D Charge Density Measurements for Commissioning of the PolariX-TDS
9th International Particle Accelerator Conference, IPAC’18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 , 4 pp. () [10.3204/PUBDB-2018-01987]  GO
The prototype of a novel X-band transverse deflection structure, the Polarizable X-band (PolariX) TDS, is currently being prepared for installation in the FLASHForward beamline at DESY in early 2019. This structure will have the novel feature of variable polarization of the deflecting mode, allowing bunches to be streaked at any transverse angle, rather than at just one angle as in a conventional cavity. [...]
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2018-05-17
14:31
OpenAccess [PUBDB-2018-01985] Poster
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Simulations of 3D Charge Density Measurements for Commissioning of the PolariX-TDS
9th International Particle Accelerator Conference, IPAC’18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
The prototype of a novel X-band transverse deflection structure, the Polarizable X-band (PolariX) TDS, is currently being prepared for installation in the FLASHForward beamline at DESY in early 2019. This structure will have the novel feature of variable polarization of the deflecting mode, allowing bunches to be streaked at any transverse angle, rather than at just one angle as in a conventional cavity. [...]
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2018-05-02
08:40
OpenAccess [PUBDB-2018-01880] Conference Presentation
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FLASHForward: DOOCS CONTROL System for a Beam-Driven Plasma-Wakefield Acceleration Experiment
9th International Particle Accelerator Conference, IPAC 2018, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
The FLASHForward project at DESY is an innovative beam-driven plasma-wakefield acceleration experiment in-tegrated in the FLASH facility, aiming to accelerate elec-tron beams to GeV energies over a few centimetersof ion-ised gas. These acceleratedbeams are tested for their capa-bility to demonstrate exponential free-electron laser gain; achievable only through rigorous analysis of both the driver and witness beam's phase space.The thematic priority covered in here the control system part of FLASHForward.To be able to control, read out and save data from the diagnostics into DAQ, the DOOCS control system has been integrated into FLASH Forward. [...]
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2018-05-02
08:32
OpenAccess [PUBDB-2018-01879] Poster
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Controlling a beam-driven plasma-wakefieldacceleration experiment
9th International Particle Accelerator Conference, IPAC 2018, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
The FLASHForward project at DESY is an innovative beam-driven plasma-wakefield acceleration experi-ment integrated in the FLASH facility, aiming to accelerate electron beams to GeV energies over a few centi-metres of ionised gas. These accelerated beams are tested for their capability to demonstrate exponential free-electron laser gain; achievable only through rigorous analysis of both the driver and witness beam's phase space.The thematic priority covered in here the control system part of FLASHForward.To be able to control, read out and save data from the diagnostics into DAQ, the DOOCS control system has been integrated into FLASH Forward. [...]
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2018-03-12
11:24
OpenAccess [PUBDB-2018-01448] Journal Article
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Observation of the Self-Modulation Instability via Time-Resolved Measurements
Self-modulation of an electron beam in a plasma has been observed. The propagation of a long (several plasma wavelengths) electron bunch in an overdense plasma resulted in the production of multiple bunches via the self-modulation instability. [...]
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2018-03-06
14:12
OpenAccess [PUBDB-2018-01381] Book/Report/Dissertation / PhD Thesis
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Acceleration of laser-injected electron beams in an electron-beam driven plasma wakefield accelerator
[DESY-THESIS-2018-006]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY THESIS , 135 pp. () [10.3204/PUBDB-2018-01381] = Dissertation, Universität Hamburg, 2018  GO
Plasma wakefields deliver accelerating fields that are approximately a 100 times higher thanthose in conventional radiofrequency or even superconducting radiofrequency cavities. Thisopens a transformative path towards novel, compact and potentially ubiquitous accelerators.These prospects, and the increasing demand for electron accelerator beamtime for various applicationsin natural, material and life sciences, motivate the research and development on novelplasma-based accelerator concepts. [...]
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2018-03-05
11:32
OpenAccess [PUBDB-2018-01372] Report
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Longitudinal Bunch Diagnostics using Coherent Transition Radiation Spectroscopy
[DESY-18-027; arXiv:1803.00608]
, 60 pp. () [10.3204/PUBDB-2018-01372]  GO
The generation and properties of transition radiation (TR) are thoroughly treated. The spectral energy density, as described by the Ginzburg-Frank formula, is computed analytically, and the modifications caused by the finite size of the TR screen and by near-field diffraction effects are carefully analyzed. [...]
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2018-01-24
15:28
OpenAccess [PUBDB-2018-00788] Book/Report/Master Thesis
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Hollow Core Plasma Channel Generation
[DESY-THESIS-2018-005]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY THESIS , 77 pp. () [10.3204/PUBDB-2018-00788] = Masterarbeit, Universität Hamburg, 2018  GO
The use of a hollow plasma channel in plasma-based acceleration has ben-eficial properties for the acceleration of electron and positron bunches. Inthe scope of the FLASHForward facility at DESY, the generation of sucha plasma structure is examined. [...]
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2018-01-10
14:03
Embargoed OpenAccess [PUBDB-2018-00359] Journal Article

Optical surface properties and their RF limitations of European XFEL cavities
The inner surface of superconducting cavities plays a crucial role to achieve highest accelerating fields and low losses. The industrial fabrication of cavities for the European X-ray Free Electron Laser and the International Linear Collider HiGrade Research Project allowed for an investigation of this interplay. [...]
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2017-12-30
21:33
OpenAccess [PUBDB-2017-14152] Poster
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Spectroscopic characterisation of plasma targets with absolute calibration
3rd European Advanced Accelerator Concepts Workshop, EAAC 2017, La Biodola, Isola d'ElbaLa Biodola, Isola d'Elba, Italy, 24 Sep 2017 - 30 Sep 20172017-09-242017-09-30  GO
One of the key issues for generation of stable and reproducible beams in plasma particle accelerators is control of the initial plasma density distribution. Not only the longitudinal but also the transverse density profile, the species distribution as well as fragmentation and ionisation dynamics can have significant impact on the generated beams [...]
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