Bochum 2015 – scientific programme

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P: Fachverband Plasmaphysik

P 25: Low Temperature Plasmas III

P 25.1: Fachvortrag

Thursday, March 5, 2015, 10:30–10:55, HZO 30

PROMETHEUS-A: A helicon plasma source for future wakefield accelerators — •Birger Buttenschön, Nils Fahrenkamp, and Olaf Grulke — Max Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17491 Greifswald, Germany

High density plasma sources are of interest for a wide range of applications like plasma-wall interaction studies, plasma thrusters for space propulsion, or future plasma wakefield particle accelerators. In this contribution, we present a high power helicon cell designed for the world’s first proton-beam driven plasma wakefield accelerator experiment AWAKE. Using a modular concept with four antennas distributed along a one meter long, five centimeter diameter prototype module providing up to 35 kW of rf power to the plasma, accelerator relevant densities of 6· 10²⁰ m⁻³ are transiently achieved and exceeded. These high density plasmas are characterized for the use with wakefield accelerators, considering density evolution and its reproducibility, plasma profiles and neutral gas inventory.