Ion Acceleration in Multispecies Targets Driven by Intense Laser Radiation Pressure

Year: 2012

Authors: Kar S., Kakolee K. F., Qiao B., Macchi A., Cerchez M., Doria D., Geissler M., McKenna P., Neely D., Osterholz J., Prasad R., Quinn K., Ramakrishna B., Sarri G., Willi O., Yuan X.Y., Zepf M., Borghesi M.

Autors Affiliation: Queens Univ Belfast, Sch Math & Phys, Ctr Plasma Phys, Belfast BT7 1NN, Antrim, North Ireland; CNR, Ist Nazl Ott, I-56100 Pisa, Italy; Dept Phys Enrico Fermi, I-56127 Pisa, Italy; Univ Dusseldorf, Inst Laser & Plasmaphys, D-40225 Dusseldorf, Germany; Univ Strathclyde, SUPA, Dept Phys, Glasgow G4 0NG, Lanark, Scotland; Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England; Helmholtz Inst Jena, D-07743 Jena, Germany; Inst Phys ASCR, ELI Beamlines Project, Prague 18221, Czech Republic.

Abstract: The acceleration of ions from ultrathin foils has been investigated by using 250 TW, subpicosecond laser pulses, focused to intensities of up to 3 X 10(20) W cm(-2). The ion spectra show the appearance of narrow-band features for protons and carbon ions peaked at higher energies (in the 5-10 MeV/nucleon range) and with significantly higher flux than previously reported. The spectral features and their scaling with laser and target parameters provide evidence of a multispecies scenario of radiation pressure acceleration in the light sail mode, as confirmed by analytical estimates and 2D particle-in-cell simulations. The scaling indicates that monoenergetic peaks with more than 100 MeV/nucleon are obtainable with moderate improvements of the target and laser characteristics, which are within reach of ongoing technical developments.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 109 (18)      Pages from: 185006-1  to: 185006-5

More Information: The authors acknowledge funding from EPSRC [EP/E035728/1-LIBRA consortium, EP/E048668/1 and EP/J002550/1-Career Acceleration Fellowship held by S. K.], Leverhulme Trust (Fellowship ECF-2011-383 held by G. S.), MIUR (Italy) via the FIRB project SULDIS, projects ELI (Grant No. CZ.1.05/1.1.00/483/02.0061) and OPVK 3 (Grant No. CZ.1.07/2.3.00/20.0279), and DFG programs TR18 and GK1203. The authors also acknowledge support from the target fabrication group and e-Science facility of RAL-STFC.
KeyWords: Generation; Therapy; Pulses
DOI: 10.1103/PhysRevLett.109.185006

Citations: 243
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