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Bücher Englische Bücher Wissen & Bildung Naturwissenschaft, Medizin, Informatik, Technik Physik & Astronomie Elektrizität, Magnetismus, Optik Laser proton acceleration from water micro-droplets and solid hydrogen targets
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Laser proton acceleration from water micro-droplets and solid hydrogen targets
Jens Polz (Unbekannter Einband, Englisch)
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Beschreibung
This thesis is dealing with the acceleration of protons during the interaction of relativistic laser pulses with plasmas. The focus was directed on the measurement and the improvement of the properties of the proton beam and the enhancement of the conversion efficiency of the laser-pulse energy into kinetic energy of the protons. Here, the investigation of the generation of energetic protons from… water micro-droplets identified the temporal intensity contrast of the laser pulse as one of the causes for the present limitation of the maximal obtainable particle energy. By controlling this property, an increase by a factor of 10 in the motional energy of the protons in comparison to earlier experiments could be achieved. Furthermore, the realisation of proton pulses at high repetition rate could be demonstrated by continuous generation of the water micro-droplets.
Additionally, filaments of solid hydrogen for the production of proton beams with high-intensity lasers were investigated in detail in this thesis. Here, the evaporation of the hydrogen leads to the formation of a corona which in
uences the acceleration mechanism. The plasma expansion of the filament is inducing a shock wave in the corona leading to a distinct modulation of the energy spectrum of the protons. Furthermore, it could be demonstrated that the conversion eciency of laser pulse energy into proton energy for a 10-TW-class laser is increased to a few percent which so far only could be shown with high-energy lasers, providing several 100's of Joule of pulse energy.
The implementation of a process for the continuous monitoring of the proton-beam profile exhibited a dependency of the structures within the beam on the dimensionality of the target.
The efficient generation of energetic proton beams at high repetition rate demonstrated in this thesis, is of great interest in the view of applications in the area of accelerator technology, material science and medical physics. Dieses Produkt haben wir gerade leider nicht auf Lager.
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Technische Daten
Erscheinungsdatum
18.08.2017
Sprache
Englisch
EAN
9783863878382
Herausgeber
Mensch & Buch
Sonderedition
Nein
Autor
Jens Polz
Seitenanzahl
156
Auflage
1
Einbandart
Unbekannter Einband
Einbandart Details
Laminiert
Schlagwörter
Laser proton, protons, single-electron interaction, proton beam, laser-pulse energy, ionisation, relativistic laser pulses, Laser field, plasma
Thema-Inhalt
PHJL - Laserphysik
PHP - Teilchen- und Hochenergiephysik
Thema-Zusatz
für die Berufsbildung / Berufsausbildung, für die Erwachsenenbildung, für die Hochschulausbildung
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