Würzburg 2018 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: New Accelerator Concepts

AKBP 2.3: Vortrag

Montag, 19. März 2018, 16:30–16:45, NW-Bau - HS2

Laser-driven proton acceleration from cryogenic hydrogen jets — Tim Ziegler^1,2, Martin Rehwald^1,2, Sebastian Göde³, Stephan Kraft¹, Josefine Metzkes-Ng¹, •Lieselotte Obst^1,2, Hans-Peter Schlenvoigt¹, Chandra Curry⁴, Maxence Gauthier⁴, Christian Rödel⁴, Siegfried Glenzer⁴, Karl Zeil¹, and Ulrich Schramm^1,2 — ¹Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — ²TU Dresden, Dresden, Germany — ³European XFEL GmbH, Schenefeld, Germany — ⁴SLAC National Accelerator Laboratory, Menlo Park, United States

To advance the development of laser proton accelerators for highly demanding applications like cancer treatment a stable source of energetic particles at high repetition rates is required.

We present recent results from our experimental campaign employing a cryogenic hydrogen jet as a renewable and debris free laser-driven source of pure proton beams generated at the 150 TW ultrashort pulse laser Draco.

Different ion diagnostics reveal mono-species proton acceleration in the laser incidence plane around the wire-like target, reaching cut-off energies of up to 20 MeV and exceeding 10⁹ protons per MeV per steradian. In addition, the exact jet-position and the laser-plasma interaction could be monitored on-shot in two axes (perpendicular and parallel to the pump laser) with a temporally synchronized stand-alone probe laser beam. Evaluations of two different target geometries (cylindrical and planar) demonstrate more optimized acceleration conditions using the planar hydrogen jet.