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| 001 | 480259 | ||
| 005 | 20231107210732.0 | ||
| 024 | 7 | _ | |a 10.3204/PUBDB-2022-03578 |2 datacite_doi |
| 037 | _ | _ | |a PUBDB-2022-03578 |
| 041 | _ | _ | |a English |
| 088 | _ | _ | |a DESY-THESIS-2022-014 |2 DESY |
| 100 | 1 | _ | |a Gonzalez Caminal, Pau |0 P:(DE-H253)PIP1022006 |b 0 |e Corresponding author |g male |
| 245 | _ | _ | |a Time-Resolved Phase-Space Characterisation of Plasma-Wakefield-Accelerated Electrons at FLASHForward |f 2017-11-01 - 2022-07-06 |
| 260 | _ | _ | |a Hamburg |c 2022 |b Verlag Deutsches Elektronen-Synchrotron DESY |
| 300 | _ | _ | |a 262 |
| 336 | 7 | _ | |a Output Types/Dissertation |2 DataCite |
| 336 | 7 | _ | |a Book |0 PUB:(DE-HGF)3 |2 PUB:(DE-HGF) |m book |
| 336 | 7 | _ | |a DISSERTATION |2 ORCID |
| 336 | 7 | _ | |a PHDTHESIS |2 BibTeX |
| 336 | 7 | _ | |a Thesis |0 2 |2 EndNote |
| 336 | 7 | _ | |a Dissertation / PhD Thesis |b phd |m phd |0 PUB:(DE-HGF)11 |s 1699361276_341807 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a doctoralThesis |2 DRIVER |
| 490 | 0 | _ | |a DESY-THESIS |
| 502 | _ | _ | |a Dissertation, Universität Hamburg, 2022 |c Universität Hamburg |b Dissertation |d 2022 |o 2022-07-06 |
| 520 | _ | _ | |a A plasma can sustain electric fields orders of magnitude larger than those attainable with the conventional radio-frequency (RF) technology typically used in particle accelerators, which are limited to ∼ 100 MV/m due to electrical breakdowns occurring at the metallic boundary of the accelerating structures. In a particle-beam-driven plasma-wakefield accelerator (PWFA), a charge-density wake sustaining field gradients in excess of GV/m is driven by the passage of a relativistic high-intensity particle bunch through a plasma. By harnessing the gradientsof the wake, particles trailing behind the wakefield-driving bunch can be accelerated to GeV energies over meter distances, thus enabling a drastic reduction of the size of acceleratorcomponenents and, consequently, potentially reducing the costs of future accelerator facilities. Despite this promise, however, for PWFA to be a viable technology, the quality of theaccelerated bunches must match that achieved by RF-based state-of-the-art FEL linacs and particle colliders. Even though theoretical predictions suggest that PWFA schemes are capable of producing electric-field profiles with properties sufficient to preserve the longitudinal-phase-space structure of the accelerating beam, direct experimental demonstration has not yet been achieved.In the work presented in this thesis the diagnostic capabilities of a novel X-band transverse deflection structure (TDS)—featuring femtosecond resolution and a variablepolarisation of the streaking field—are exploited to investigate two mechanisms enabling the preservation of the energy spread of electron beams accelerated in a nonlinear plasma wake: optimal beam loading to preserve the correlated energy spread and a fully evacuated ion column to preserve the uncorrelated energy spread. By directly observing the longitudinal phase space of 1-GeV bunches accelerated 44 MeV in a nonlinear plasma wake, experiments performed at the FLASHForward facility (DESY, Hamburg) demonstrate that the longitudinal accelerating gradients are transversely homogeneous to within 0.8 % (1.5 %) at an interval of confidence of 68 % (95 %) and show variable amounts of beam loading depending on the exact shape of the current profile of the driver-trailing-bunch pair. The results presented in this work experimentally demonstrate the predicted suitability of PWFA for future applications requiring the preservation of high longitudinal beam quality. Furthermore, a reconstruction of the beam-plasma interaction in a particle-in-cell code has been accomplished, which illustrates the extreme sensitivity of the PWFA acceleration process to the phase-space distribution of the incoming beams. These achievements suggest that, while PWFA is capable of producing the desired field geometries, an improved control over the production of driver-trailing-bunch pairs will be required to demonstrate stable and quality-preserving acceleration at higher energy gains. |
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| 536 | _ | _ | |a PHGS, VH-GS-500 - PIER Helmholtz Graduate School (2015_IFV-VH-GS-500) |0 G:(DE-HGF)2015_IFV-VH-GS-500 |c 2015_IFV-VH-GS-500 |x 1 |
| 693 | _ | _ | |a FLASH |e FLASHForward |1 EXP:(DE-H253)FLASH-20150101 |0 EXP:(DE-H253)FLASHForward-20150101 |5 EXP:(DE-H253)FLASHForward-20150101 |x 0 |
| 700 | 1 | _ | |a D'Arcy, Richard |0 P:(DE-H253)PIP1027904 |b 1 |e Thesis advisor |
| 700 | 1 | _ | |a Hillert, Wolfgang |0 P:(DE-H253)PIP1032393 |b 2 |e Thesis advisor |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/480259/files/Dissertation_PauGonzalez_6616473.pdf |y OpenAccess |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/480259/files/desy-thesis-22-014.title.pdf |y OpenAccess |
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