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Laser-to-proton energy transfer efficiency in laser–plasma interactions

Published online by Cambridge University Press:  01 April 2009

E. FOURKAL ,
I. VELTCHEV  and
C.-M. MA
E. FOURKAL
Affiliation:
Department of Radiation Physics, Fox Chase Cancer Center, Philadelphia, PA 19111, USA (eugene.fourkal@fccc.edu)
I. VELTCHEV
Affiliation:
Department of Radiation Physics, Fox Chase Cancer Center, Philadelphia, PA 19111, USA (eugene.fourkal@fccc.edu)
C.-M. MA
Affiliation:
Department of Radiation Physics, Fox Chase Cancer Center, Philadelphia, PA 19111, USA (eugene.fourkal@fccc.edu)
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Abstract

It is shown that the energy of protons accelerated in laser–matter interaction experiments may be significantly increased through the process of splitting the incoming laser pulse into multiple interaction stages of equal intensity. From a thermodynamic point of view, the splitting procedure can be viewed as an effective way of increasing the efficiency of energy transfer from the laser light to protons, which peaks for processes having the least amount of entropy gain. It is predicted that it should be possible to achieve at least a 100% increase in the energy efficiency in a six-stage laser proton accelerator compared with a single laser–target interaction scheme.

Type
Papers
Information
Journal of Plasma Physics , Volume 75 , Issue 2 , April 2009 , pp. 235 - 250
Copyright
Copyright © Cambridge University Press 2008

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