Spectral shaping of laser generated proton beams

S.M. Pfotenhauer, O. Jäckel, A. Sachtleben, J. Polz, W. Ziegler, H.P. Schlenvoigt, K.U. Amthor, M. C. Kaluza, K.W.D. Ledingham, R. Sauerbrey, P. Gibbon, A. P. L. Robinson, H. Schwoerer

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The rapid progress in the field of laser particle acceleration has stimulated a debate about the promising perspectives of laser based ion beam sources. For a long time, the beams produced exhibited quasi-thermal spectra. Recent proof-of-principle experiments demonstrated that ion beams with narrow energy distribution can be generated from special target geometries. However, the achieved spectra were strongly limited in terms of monochromacity and reproducibility. We show that microstructured targets can be used to reliably produce protons with monoenergetic spectra above 2 MeV with less than 10% energy spread. Detailed investigations of the effects of laser ablation on the target resulted in a significant improvement of the reproducibility. Based on statistical analysis, we derive a scaling law between proton peak position and laser energy, underlining the suitability of this method for future applications. Both the quality of the spectra and the scaling law are well reproduced by numerical simulations.
LanguageEnglish
Article number033034
Number of pages14
JournalNew Journal of Physics
Volume10
DOIs
Publication statusPublished - 27 Mar 2008

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proton beams
scaling laws
lasers
ion beams
protons
particle acceleration
statistical analysis
laser ablation
energy distribution
energy
geometry
simulation

Keywords

  • proton beams
  • laser particle acceleration
  • spectral shaping
  • reproducibility
  • laser ablation

Cite this

Pfotenhauer, S. M., Jäckel, O., Sachtleben, A., Polz, J., Ziegler, W., Schlenvoigt, H. P., ... Schwoerer, H. (2008). Spectral shaping of laser generated proton beams. New Journal of Physics, 10, [033034]. https://doi.org/10.1088/1367-2630/10/3/033034
Pfotenhauer, S.M. ; Jäckel, O. ; Sachtleben, A. ; Polz, J. ; Ziegler, W. ; Schlenvoigt, H.P. ; Amthor, K.U. ; Kaluza, M. C. ; Ledingham, K.W.D. ; Sauerbrey, R. ; Gibbon, P. ; Robinson, A. P. L. ; Schwoerer, H. / Spectral shaping of laser generated proton beams. In: New Journal of Physics. 2008 ; Vol. 10.
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Pfotenhauer, SM, Jäckel, O, Sachtleben, A, Polz, J, Ziegler, W, Schlenvoigt, HP, Amthor, KU, Kaluza, MC, Ledingham, KWD, Sauerbrey, R, Gibbon, P, Robinson, APL & Schwoerer, H 2008, 'Spectral shaping of laser generated proton beams' New Journal of Physics, vol. 10, 033034. https://doi.org/10.1088/1367-2630/10/3/033034

Spectral shaping of laser generated proton beams. / Pfotenhauer, S.M.; Jäckel, O.; Sachtleben, A.; Polz, J.; Ziegler, W.; Schlenvoigt, H.P.; Amthor, K.U.; Kaluza, M. C.; Ledingham, K.W.D.; Sauerbrey, R.; Gibbon, P. ; Robinson, A. P. L.; Schwoerer, H.

In: New Journal of Physics, Vol. 10, 033034, 27.03.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Spectral shaping of laser generated proton beams

AU - Pfotenhauer, S.M.

AU - Jäckel, O.

AU - Sachtleben, A.

AU - Polz, J.

AU - Ziegler, W.

AU - Schlenvoigt, H.P.

AU - Amthor, K.U.

AU - Kaluza, M. C.

AU - Ledingham, K.W.D.

AU - Sauerbrey, R.

AU - Gibbon, P.

AU - Robinson, A. P. L.

AU - Schwoerer, H.

PY - 2008/3/27

Y1 - 2008/3/27

N2 - The rapid progress in the field of laser particle acceleration has stimulated a debate about the promising perspectives of laser based ion beam sources. For a long time, the beams produced exhibited quasi-thermal spectra. Recent proof-of-principle experiments demonstrated that ion beams with narrow energy distribution can be generated from special target geometries. However, the achieved spectra were strongly limited in terms of monochromacity and reproducibility. We show that microstructured targets can be used to reliably produce protons with monoenergetic spectra above 2 MeV with less than 10% energy spread. Detailed investigations of the effects of laser ablation on the target resulted in a significant improvement of the reproducibility. Based on statistical analysis, we derive a scaling law between proton peak position and laser energy, underlining the suitability of this method for future applications. Both the quality of the spectra and the scaling law are well reproduced by numerical simulations.

AB - The rapid progress in the field of laser particle acceleration has stimulated a debate about the promising perspectives of laser based ion beam sources. For a long time, the beams produced exhibited quasi-thermal spectra. Recent proof-of-principle experiments demonstrated that ion beams with narrow energy distribution can be generated from special target geometries. However, the achieved spectra were strongly limited in terms of monochromacity and reproducibility. We show that microstructured targets can be used to reliably produce protons with monoenergetic spectra above 2 MeV with less than 10% energy spread. Detailed investigations of the effects of laser ablation on the target resulted in a significant improvement of the reproducibility. Based on statistical analysis, we derive a scaling law between proton peak position and laser energy, underlining the suitability of this method for future applications. Both the quality of the spectra and the scaling law are well reproduced by numerical simulations.

KW - proton beams

KW - laser particle acceleration

KW - spectral shaping

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M3 - Article

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JF - New Journal of Physics

SN - 1367-2630

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Pfotenhauer SM, Jäckel O, Sachtleben A, Polz J, Ziegler W, Schlenvoigt HP et al. Spectral shaping of laser generated proton beams. New Journal of Physics. 2008 Mar 27;10. 033034. https://doi.org/10.1088/1367-2630/10/3/033034