Approach towards quasi-monoenergetic laser ion acceleration with doped target
- Quantum Beam Science Directorate, Japan Atomic Energy Agency, 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215 (Japan)
Ion acceleration using a laser pulse irradiating a disk target that includes hydrogen and carbon is examined using three-dimensional particle-in-cell simulations. It is shown that over 200 MeV protons can be generated using a 620 TW, 5 × 10{sup 21} W/cm{sup 2} laser pulse. In a polyethylene (CH{sub 2}) target, protons and carbon ions separate and form two layers by radiation pressure acceleration. A strong Coulomb explosion in this situation and Coulomb repulsion between each layer generates high energy protons. A doped target consisting of low density hydrogen within a carbon disk becomes a double layer target that is comprised of a thin low density hydrogen disk on the surface of a high-Z atom layer. This then generates a quasi-monoenergetic proton beam.
- OSTI ID:
- 22252812
- Journal Information:
- Physics of Plasmas, Vol. 21, Issue 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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