Jahn, Diana (2019)
Achieving highest proton intensities with a laser-based
ion beamline.
Technische Universität Darmstadt
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
This thesis reports on a test beamline which combines laser-driven ion sources with conventional accelerator elements realized at GSI Helmholtzzentrum für Schwerionenforschung GmbH. The Petawatt High-Energy Laser for Heavy Ion EXperiments (PHELIX) drove a Target Normal Sheath Acceleration (TNSA) source which delivered an exponentially decaying proton spectrum up to ≈ 21.5 MeV. In the next step, the generated proton beam is collimated by a pulsed high-field solenoid, which selected a specific energy range. Through this setting, the central energy was defined, which was transported through the whole beamline. In this thesis, the aim was a central energy value of E0 = 8 MeV and solenoid magnetic field strength of 6.5 T. Proton numbers of the order of 10^9 were measured in an energy interval of (8.5 ± 0.25) MeV. Afterwards, the collimated proton bunch entered a radiofrequency (rf) cavity operated at 108.4 MHz. Inside this element, the particle bunch was compressed in longitudinal phase space around its central energy by a certain angle. At an rf power of 6.26 V, the proton bunch was temporally focused to a bunch duration of (458 ± 40) ps at full width at half maximum (FWHM) in 6 m distance from the source. The measurement was performed with a specially developed diamond membrane detector, which had a time resolution of (113 ± 11) ps (FWHM). Finally, a second pulsed high-field solenoid was built-in as a final focusing system. In consequence, the beam was focused down to a focal spot size of 1.1 mm x 1.2 mm at FWHM.
| Typ des Eintrags: | Dissertation | ||||
|---|---|---|---|---|---|
| Erschienen: | 2019 | ||||
| Autor(en): | Jahn, Diana | ||||
| Art des Eintrags: | Erstveröffentlichung | ||||
| Titel: | Achieving highest proton intensities with a laser-based ion beamline | ||||
| Sprache: | Englisch | ||||
| Referenten: | Roth, Prof. Dr. Markus ; Boine-Frankenheim, Prof. Dr. Oliver | ||||
| Publikationsjahr: | 1 Oktober 2019 | ||||
| Ort: | Darmstadt | ||||
| Datum der mündlichen Prüfung: | 17 Juni 2019 | ||||
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/9275 | ||||
| Kurzbeschreibung (Abstract): | This thesis reports on a test beamline which combines laser-driven ion sources with conventional accelerator elements realized at GSI Helmholtzzentrum für Schwerionenforschung GmbH. The Petawatt High-Energy Laser for Heavy Ion EXperiments (PHELIX) drove a Target Normal Sheath Acceleration (TNSA) source which delivered an exponentially decaying proton spectrum up to ≈ 21.5 MeV. In the next step, the generated proton beam is collimated by a pulsed high-field solenoid, which selected a specific energy range. Through this setting, the central energy was defined, which was transported through the whole beamline. In this thesis, the aim was a central energy value of E0 = 8 MeV and solenoid magnetic field strength of 6.5 T. Proton numbers of the order of 10^9 were measured in an energy interval of (8.5 ± 0.25) MeV. Afterwards, the collimated proton bunch entered a radiofrequency (rf) cavity operated at 108.4 MHz. Inside this element, the particle bunch was compressed in longitudinal phase space around its central energy by a certain angle. At an rf power of 6.26 V, the proton bunch was temporally focused to a bunch duration of (458 ± 40) ps at full width at half maximum (FWHM) in 6 m distance from the source. The measurement was performed with a specially developed diamond membrane detector, which had a time resolution of (113 ± 11) ps (FWHM). Finally, a second pulsed high-field solenoid was built-in as a final focusing system. In consequence, the beam was focused down to a focal spot size of 1.1 mm x 1.2 mm at FWHM. |
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| URN: | urn:nbn:de:tuda-tuprints-92757 | ||||
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik > Laser- und Plasmaphysik |
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| Hinterlegungsdatum: | 17 Nov 2019 20:55 | ||||
| Letzte Änderung: | 17 Nov 2019 20:55 | ||||
| PPN: | |||||
| Referenten: | Roth, Prof. Dr. Markus ; Boine-Frankenheim, Prof. Dr. Oliver | ||||
| Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 17 Juni 2019 | ||||
| Export: | |||||
| Suche nach Titel in: | TUfind oder in Google | ||||
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