Aurand, B.B.AurandKuschel, S.S.KuschelRödel, C.C.RödelJäckel, O.O.JäckelPolz, J.J.PolzElkin, B.B.ElkinZhao, H.Y.H.Y.ZhaoKarmakar, A.A.KarmakarGibbon, P.P.GibbonKaluza, M.C.M.C.KaluzaKuehl, T.T.Kuehl2022-03-042022-03-042015https://publica.fraunhofer.de/handle/publica/23938610.1007/s00340-014-5979-72-s2.0-849185577552-s2.0-849271583832-s2.0-85028157580In this paper, we report on measurements of bremsstrahlung in laser ion acceleration experiments from ultra-thin, polymer-based target foils. The influence of laser polarization on the generated radiation, the maximum achievable proton energy and the total proton number is investigated. A clear benefit in terms of radiation reduction by the use of circular polarized light can be observed. At the same time, the total number of accelerated protons was increased.en621journal article