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Abstract
A dual ion species plasma expansion scheme from a novel target structure is introduced, in which a nanometer-thick layer of pure deuterium exists as a buffer species at the target-vacuum interface of a hydrogen plasma. Modeling shows that by controlling the deuterium layer thickness, a composite H+/D+ ion beam can be produced by target normal sheath acceleration (TNSA), with an adjustable ratio of ion densities, as high energy proton acceleration is suppressed by the acceleration of a spectrally peaked deuteron beam. Particle in cell modeling shows that a (4.3±0.7) MeV per nucleon deuteron beam is accelerated, in a directional cone of half angle 9°. Experimentally, this was investigated using state of the art cryogenic targetry and a spectrally peaked deuteron beam of (3.4±0.7) MeV per nucleon was measured in a cone of half angle 7°-9°, while maintaining a significant TNSA proton component.
Original language | English |
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Article number | 204801 |
Journal | Physical Review Letters |
Volume | 120 |
Issue number | 20 |
DOIs | |
Publication status | Published - 18 May 2018 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Projects
- 1 Active
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R1304CPP: Advanced laser-ion acceleration strategies towards next generation healthcare
Borghesi, M., Kar, S., Prise, K. & Zepf, M.
01/08/2012 → …
Project: Research