Speaker
Mrs
Lieselotte Obst
(Helmholtz-Zentrum Dresden-Rossendorf)
Description
We report on recent experimental results deploying a continuous cryogenic hydrogen jet as a debris-free, renewable laser-driven source of pure proton beams generated at the 150 TW ultrashort pulse laser Draco. Efficient proton acceleration reaching cut-off energies of up to 20 MeV with particle numbers exceeding 10^9 particles per MeV per steradian is demonstrated, showing for the first time that the acceleration performance is comparable to solid foil targets with thicknesses in the micrometer range. Two different target geometries are presented and their proton beam deliverance characterized: cylindrical (diameter = 5 µm) and planar (20 µm x 2 µm).
In both cases typical Target Normal Sheath Acceleration emission patterns with exponential proton energy spectra are detected.
Significantly higher proton numbers in laser-forward direction are observed when deploying the planar jet as compared to the cylindrical jet case. This is confirmed by two-dimensional Particle in Cell (2D3V PIC) simulations, which demonstrate that the planar jet proves favorable as its geometry leads to more optimized acceleration conditions.
Primary author
Mrs
Lieselotte Obst
(Helmholtz-Zentrum Dresden-Rossendorf)
Co-authors
Mr
Axel Huebl
(Helmholtz-Zentrum Dresden-Rossendorf)
Mrs
Chandra Curry
(SLAC National Accelerator Laboratory)
Dr
Christian Rödel
(Friedrich-Schiller-University Jena, Germany)
Mr
Florian-Emanuel Brack
(Helmholtz-Zentrum Dresden-Rossendorf)
Dr
Hans-Peter Schlenvoigt
(Helmholtz-Zentrum Dresden - Rossendorf)
Dr
Josefine Metzkes
(Helmholtz-Zentrum Dresden-Rossendorf)
Mr
João Branco
(Helmholtz-Zentrum Dresden-Rossendorf)
Dr
Karl Zeil
(Helmholtz-Zentrum Dresden-Rossendorf)
Mr
Lev Kazak
(University of Rostock, Germany)
Mr
Markus Loeser
(Helmholtz-Zentrum Dresden-Rossendorf)
Mr
Martin Rehwald
(Helmholtz-Zentrum Dresden-Rossendorf)
Dr
Maxence Gauthier
(SLAC National Accelerator Laboratory)
Dr
Sebastian Göde
(European XFEL)
Dr
Siegfried Glenzer
(SLAC National Accelerator Laboratory)
Mr
Steffen Wolter
(University of Rostock, Germany)
Dr
Stephan Kraft
(Helmholtz-Zentrum Dresden-Rossendorf)
Prof.
Thomas COWAN
(Forschungszentrum Dresden-Rossendorf)
Dr
Thomas Kluge
(Helmholtz-Zentrum Dresden-Rossendorf)
Mr
Tim Ziegler
(Helmholtz-Zentrum Dresden-Rossendorf)
Prof.
Ulrich Schramm
(Helmholtz-Zentrum Dresden-Rossendorf)
