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First demonstration of collimation and monochromatisation of a laser accelerated proton burst

Published online by Cambridge University Press:  17 November 2008

S. Ter-Avetisyan ,
M. Schnürer ,
R. Polster ,
P.V. Nickles  and
W. Sandner
S. Ter-Avetisyan*
Affiliation:
Max-Born-Institut, Berlin, Germany Department of Physics and Astronomy, Queen's University of Belfast, Belfast, UK
M. Schnürer
Affiliation:
Max-Born-Institut, Berlin, Germany
R. Polster
Affiliation:
Max-Born-Institut, Berlin, Germany
P.V. Nickles
Affiliation:
Max-Born-Institut, Berlin, Germany
W. Sandner
Affiliation:
Max-Born-Institut, Berlin, Germany
*
Address correspondence and reprint requests to: Sargis Ter-Avetisyan, Department of Physics and Astronomy, The Queen's University of Belfast, Belfast BT7 1NNUK. E-mail: s.teravetisyan@qub.ac.uk
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Abstract

Laser produced ion beams have a large divergence angle and a wide energy spread. To our knowledge, this is the first demonstration of collimation and monochromatisation of laser accelerated proton beams, using a permanent quadrupole magnet lens system. It acts as a tunable band pass filter by collimating or focusing the protons with the same energy. Because it gathers nearly the whole proton emission, a strong enhancement of the beam density appears. For the collimated beam, an increase of the proton density in the (3.7 ± 0.3) MeV energy band up to a factor of ~30, from possible 40, relative to the non-collimated beam is demonstrated. With the help of this simple, reliable, and well established technique new perspectives will be opened for science and technology, monoenergetic ion beams can be attained in any lab, where a source of laser accelerated ions exist. This finding enables to apply afterward well known beam steering techniques to the formed ion beam, which are applied in conventional accelerators to manipulate the beam parameters or to transport the beams and make them use in many application.

Keywords

Ion accelerationIon beam collimationLaser plasmaQuadrupole-magnet lensSpectral tailoring
Type
Research Article
Information
Laser and Particle Beams , Volume 26 , Issue 4 , December 2008 , pp. 637 - 642
Copyright
Copyright © Cambridge University Press 2008

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