CR-39 track detector calibration for H, He, and C ions from 0.1-0.5 MeV up to 5 MeV for laser-induced nuclear fusion product identification

The Review of Scientific Instruments
C BaccouC Labaune

Abstract

Laser-accelerated ion beams can be used in many applications and, especially, to initiate nuclear reactions out of thermal equilibrium. We have experimentally studied aneutronic fusion reactions induced by protons accelerated by the Target Normal Sheath Acceleration mechanism, colliding with a boron target. Such experiments require a rigorous method to identify the reaction products (alpha particles) collected in detectors among a few other ion species such as protons or carbon ions, for example. CR-39 track detectors are widely used because they are mostly sensitive to ions and their efficiency is near 100%. We present a complete calibration of CR-39 track detector for protons, alpha particles, and carbon ions. We give measurements of their track diameters for energy ranging from hundreds of keV to a few MeV and for etching times between 1 and 8 h. We used these results to identify alpha particles in our experiments on proton-boron fusion reactions initiated by laser-accelerated protons. We show that their number clearly increases when the boron fuel is preformed in a plasma state.

References

Aug 23, 2002·Physical Review Letters·M HegelichM Roth
May 17, 2003·Science·K W D LedinghamR P Singhal
Jun 6, 2003·Physical Review Letters·P Mora
Oct 4, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·V S BelyaevV P Andrianov
Jul 23, 2008·Physical Review Letters·S KarO Willi

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Citations

Mar 3, 2018·The Review of Scientific Instruments·M SeimetzJ M Benlloch
Mar 3, 2021·The Review of Scientific Instruments·M Ahsan MahmoodChang Hee Nam
May 20, 2021·Physical Review. E·Yu K KurilenkovI S Samoylov

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