Quantitative analysis of proton imaging measurements of laser-induced plasmas

T. Repsilber, Marco Borghesi, J.C. Gauthier, K. Lowenbruck, A. Mackinnon, V. Malka, P. Patel, G. Pretzler, Lorenzo Romagnani, T. Toncian, O. Willi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A method for obtaining quantitative information about electric field and charge distributions from proton imaging measurements of laser-induced plasmas is presented. A parameterised charge distribution is used as target plasma. The deflection of a proton beam by the electric field of such a plasma is simulated numerically as well as the resulting proton density, which will be obtained on a screen behind the plasma according to the proton imaging technique. The parameters of the specific charge distributions are delivered by a combination of linear regression and nonlinear fitting of the calculated proton density distribution to the measured optical density of a radiochromic film screen changed by proton exposure. It is shown that superpositions of spherical Gaussian charge distributions as target plasma are sufficient to simulate various structures in proton imaging measurements, which makes this method very flexible.
Original languageEnglish
Pages (from-to)905-913
Number of pages9
JournalApplied Physics B - Lasers and Optics
Issue number7
Publication statusPublished - Jun 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)


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