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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 13, Iss. 1 — Mar. 25, 2009
  • pp: 48–52

Effects of the Micro-hole Target Structures on the Laser-driven Energetic Proton Generation

Ki-Hong Pae, Il-Woo Choi, Sang-June Hahn, and Jong-Min Lee  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 13, Issue 1, pp. 48-52 (2009)


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Abstract

Micro-hole targets are studied to generate energetic protons from laser-thin foil targets by using 2-dimensional particle-in-cell simulations. By using a small hole, the maximum energy of the accelerated proton is increased to 4 times higher than that from a simple planar target. The main proton acceleration mechanism of the hole-targets is the electrostatic field created between the fast electrons accelerated by the laser pulse ponderomotive force combined with the vacuum heating and the target rear surface. But in this case, the proton angular distribution shows double-peak shape, which means poor collimation and low current density. By using a small cone-shaped hole, the maximum proton energy is increased 3 times higher than that from a simple planar target. Furthermore, the angular distribution of the accelerated protons shows good collimation.

© 2009 Optical Society of Korea

OCIS Codes
(140.3460) Lasers and laser optics : Lasers
(350.5400) Other areas of optics : Plasmas

History
Original Manuscript: January 5, 2009
Revised Manuscript: February 2, 2009
Manuscript Accepted: March 4, 2009
Published: March 25, 2009

Citation
Ki-Hong Pae, Il-Woo Choi, Sang-June Hahn, and Jong-Min Lee, "Effects of the Micro-hole Target Structures on the Laser-driven Energetic Proton Generation," J. Opt. Soc. Korea 13, 48-52 (2009)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-13-1-48


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