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First demonstration of multi-MeV proton acceleration from a cryogenic hydrogen ribbon target

Stephan D Kraft, Lieselotte Obst, Josefine Metzkes-Ng, Hans-Peter Schlenvoigt, Karl Zeil, Sylvain Michaux, Denis Chatain, Jean-Paul Perin, Sophia N Chen, Julien Fuchs2018年Plasma Physics and Controlled FusionIF 2.2出版社

We show efficient laser driven proton acceleration up to 14 MeV from a 62 μm thick cryogenic hydrogen ribbon. Pulses of the short pulse laser ELFIE at LULI with a pulse length of ≈350 fs at an energy of 8 J per pulse are directed onto the target. The results are compared to proton spectra from metal and plastic foils with different thicknesses and show a similarly good performance both in maximum energy as well as in proton number. Thus, this target type is a promising candidate for experiments with high repetition rate laser systems.

日本語訳

我々は、厚さ62 μmの極低温水素リボンから、最大14 MeVまでの効率的なレーザー駆動陽子加速を示す。LULIの短パルスレーザーELFIEのパルス(パルス幅約350 fs、1パルスあたりのエネルギー8 J)をターゲットに照射した。その結果を、異なる厚さの金属およびプラスチック箔からの陽子スペクトルと比較し、最大エネルギーと陽子数の両方において同様に優れた性能を示すことを実証した。したがって、このターゲットタイプは、高繰り返しレーザーシステムを用いた実験における有望な候補である。

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Proton acceleration
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