Dresden 2020 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 4: New Accelerator Concepts
AKBP 4.6: Vortrag
Montag, 16. März 2020, 17:45–18:00, GÖR 226
Characterisation of cryogenic hydrogen jet target for Laser Proton acceleration — •Stefan Assenbaum1,2, Constantin Bernert1,2, Florian Brack1,2, Lennart Gaus1,2, Stephan Kraft1, Martin Rehwald1,2, Hans-Peter Schlenvoigt1, Karl Zeil1, Tim Ziegler1,2, and Ulrich Schramm1,2 — 1Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany — 2Technische Universität Dresden, Dresden, Germany
With the rise of a new generation of high intensity, high repitition rate laser systems, new interesting fields of application emerge, like e.g. hadron therapy using laser accelerated protons. This trend imposes new demands on targetry systems for laser ion acceleration to offer both high repitition rate capability as well as tight control of all target parameters.
In recent experiments, a renewable, cryogenically cooled, solid hydrogen jet target has been implemented into the Draco PW Laser System at HZDR. This debris-free target system allows for acceleration of single-species ion beams while offering superb acceleration performance through controlled pre-expansion of the jet prior to the high intensity interaction.
In this talk, we present detailed studies on the preplasma expansion process being conducted at the Draco 150 TW system at HZDR via high resolution optical probing. Furthermore, we investigate the geometric properties of the jet and report on further efforts to enhance jet stability.