Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector

The Review of Scientific Instruments
M SeimetzJ M Benlloch

Abstract

CR-39 nuclear track material is frequently used for the detection of protons accelerated in laser-plasma interactions. The measurement of track densities allows for determination of particle angular distributions, and information on the kinetic energy can be obtained by the use of passive absorbers. We present a precise method of measuring spectral distributions of laser-accelerated protons in a single etching and analysis process. We make use of a one-to-one relation between proton energy and track size and present a precise calibration based on monoenergetic particle beams. While this relation is limited to proton energies below 1 MeV, we show that the range of spectral measurements can be significantly extended by simultaneous use of absorbers of suitable thicknesses. Examples from laser-plasma interactions are presented, and quantitative results on proton energies and particle numbers are compared to those obtained from a time-of-flight detector. The spectrum end points of continuous energy distributions have been determined with both detector types and coincide within 50-100 keV.

References

Apr 2, 2009·The Review of Scientific Instruments·F NürnbergM Roth
Nov 4, 2011·The Review of Scientific Instruments·N SinenianR D Petrasso
Jul 14, 2012·Reports on Progress in Physics·Hiroyuki DaidoAlexander S Pirozhkov
Aug 2, 2013·The Review of Scientific Instruments·A MalinowskaM Kuk
Oct 9, 2013·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·P R BoltonJ J Wilkens
May 21, 2017·Scientific Reports·T W JeongS Ter-Avetisyan

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Citations

Feb 6, 2020·International Journal of Radiation Biology·Tímea HülberCsilla Pesznyák
Mar 3, 2021·The Review of Scientific Instruments·M Ahsan MahmoodChang Hee Nam

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