000640186 001__ 640186
000640186 005__ 20251111210856.0
000640186 0247_ $$2URN$$aurn:nbn:de:gbv:18-ediss-131847
000640186 037__ $$aPUBDB-2025-04736
000640186 041__ $$aEnglish
000640186 1001_ $$0P:(DE-H253)PIP1023364$$aHuebner, Lars$$b0$$eCorresponding author$$gmale$$udesy
000640186 245__ $$aBeam Transport for a Laser-Plasma Driven Free-Electron Laser at the LUX Experiment$$f2019-01-01 - 2025-05-12
000640186 260__ $$c2025
000640186 300__ $$a145 
000640186 3367_ $$2DataCite$$aOutput Types/Dissertation
000640186 3367_ $$2ORCID$$aDISSERTATION
000640186 3367_ $$2BibTeX$$aPHDTHESIS
000640186 3367_ $$02$$2EndNote$$aThesis
000640186 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1762865646_1868915
000640186 3367_ $$2DRIVER$$adoctoralThesis
000640186 502__ $$aDissertation, Universität Hamburg, 2025$$bDissertation$$cUniversität Hamburg$$d2025$$o2025-05-12
000640186 520__ $$aFree-electron lasers (FELs) require high-quality electron beams with low energy spread, small emittance, and high peak current to enable coherent amplification of light. Laser-plasma accelerators (LPAs) could offer compact and cost-efficient drivers for FELs. However, the electron beams from state-of-the-art LPAs do not yet meet all FEL beam quality requirements simultaneously as they exit the plasma. Percent-level energy spread, micrometer-scale normalized emittance, and shot-to-shot fluctuations in beam quality pose significant challenges for FEL operation. In this thesis, a dedicated 25 m-long beamline was designed, constructed, and commissioned to demonstrate free-electron lasing at the LUX laser-plasma accelerator. The combination of decompression and chromatic focusing of the electron beams reduces the effective slice energy spread and removes limitations by the beam emittance. Applying both schemes increases the gain in a two meter short ideal undulator from a factor of 5 to a factor of 100 over the spontaneous undulator radiation. FEL simulations with the unaveraged code Puffin, suited for ultrashort beams and complex phase-spaces, extended for measured field profiles, predict a factor of 25 in gain in the experiment. Spectrally resolved detection of the FEL pulses increases the contrast by another order of magnitude, which should provide sufficient FEL signal for first lasing experiments at LUX. Beyond numerical validation, experiments were carried out to characterize and refine the beam transport from the plasma-source to the undulator. This included precise quadrupole positioning, determination and correction of strength errors, and undulator alignment to ensure an optimal beam trajectory and matching. These measures provide the necessary beam properties required for future FEL operation at LUX and establish a foundation for exploring compact, plasma-based light sources.
000640186 536__ $$0G:(DE-HGF)POF4-621$$a621 - Accelerator Research and Development (POF4-621)$$cPOF4-621$$fPOF IV$$x0
000640186 693__ $$0EXP:(DE-H253)LUX-Beamline-20221201$$5EXP:(DE-H253)LUX-Beamline-20221201$$eLaser-Driven Undulator X-Ray Source$$x0
000640186 7001_ $$0P:(DE-H253)PIP1014692$$aMaier, Andreas$$b1$$eThesis advisor$$udesy
000640186 7001_ $$0P:(DE-H253)PIP1032393$$aHillert, Wolfgang$$b2$$eThesis advisor
000640186 8564_ $$uhttps://bib-pubdb1.desy.de/record/640186/files/diss_LarsHuebner.pdf$$yRestricted
000640186 8564_ $$uhttps://bib-pubdb1.desy.de/record/640186/files/diss_LarsHuebner.pdf?subformat=pdfa$$xpdfa$$yRestricted
000640186 909CO $$ooai:bib-pubdb1.desy.de:640186$$pVDB
000640186 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1023364$$aDeutsches Elektronen-Synchrotron$$b0$$kDESY
000640186 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1014692$$aDeutsches Elektronen-Synchrotron$$b1$$kDESY
000640186 9101_ $$0I:(DE-HGF)0$$6P:(DE-H253)PIP1014692$$aExternal Institute$$b1$$kExtern
000640186 9101_ $$0I:(DE-H253)_CFEL-20120731$$6P:(DE-H253)PIP1032393$$aCentre for Free-Electron Laser Science$$b2$$kCFEL
000640186 9101_ $$0I:(DE-HGF)0$$6P:(DE-H253)PIP1032393$$aExternal Institute$$b2$$kExtern
000640186 9131_ $$0G:(DE-HGF)POF4-621$$1G:(DE-HGF)POF4-620$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lMaterie und Technologie$$vAccelerator Research and Development$$x0
000640186 9141_ $$y2025
000640186 920__ $$lyes
000640186 9201_ $$0I:(DE-H253)MPL-20120731$$kMPL$$lPlasma Acceleration and Laser Group$$x0
000640186 980__ $$aphd
000640186 980__ $$aVDB
000640186 980__ $$aI:(DE-H253)MPL-20120731
000640186 980__ $$aUNRESTRICTED