Abstract
The recent emergence of commercial, high repetition rate, intense lasers opens up new prospects for applications. Of particular interest is the production of energetic proton beams through the interaction of an intense laser with a hydrogen target: this beam can then be used e.g. for proton therapy (cancer treatment), or for neutron production through interaction of the proton or deuteron beam with a secondary target. If physical processes involved in the production of protons have started to receive satisfactory explanations, the reliable production of protons at high repetition rate without any debris is still an issue. In this context, SBT has developed different cryostats to generate thin ribbons of hydrogen through extrusion of solid hydrogen, and optimize and predict the conditions for extrusion. In this article, we show, how thin hydrogen ribbons are produced, and high energy proton beams are generated. A few results are given, and future plans are discussed
Highlights
Over the past years the technology of high power lasers experienced huge progresses
The recent emergence of commercial, high repetition rate, intense lasers opens up new prospects for applications
Of particular interest is the production of energetic proton beams through the interaction of an intense laser with a hydrogen target: this beam can be used e.g. for proton therapy, or for neutron production through interaction of the proton or deuteron beam with a secondary target
Summary
Petawatt (PW: 1015 W) lasers become more and more available (in the UK at RAL, in Spain at CLPU, at the ELI projects in eastern Europe, in France (Petal, soon Apollon)). These lasers have often a high repetition rate (up to 10 Hz), which is to compare to the repetition rate so far (1 shot per hour typically). This puts a severe challenge on the targets which these lasers impact on: the targets (destroyed after every shot) must be supplied at the same repetition rate as the laser pulse, without debris which might damage optics [1].
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