Calibration of CR-39 solid state track detectors with monoenergetic protons from 0.3 MeV to 2.5 MeV

Abstract

The 2H(d,p)3H reaction is one of the most crucial reactions in the Big Bang nucleosynthesis (BBN). It is of particular interest to investigate this kind of reactions in plasma environments, generated by high intensity lasers, which are similar to real astrophysical conditions. We have experimentally investigated the 2H(d,p)3H reaction using laser-driven counter-streaming collisionless plasmas at the Shenguang-II laser facility. CR-39 track detectors are widely employed as the main diagnostics in such experiments and laser-driven ion acceleration. In this work, we performed calibration of CR-39 track detectors with monoenergetic protons from the tandem accelerator, and then presented their track diameters for proton energies ranging from 300 keV to 2.5 MeV and for etching times between 4 and 28 hours. In addition, we recommended the optimal etching time at the typical etching conditions, which will be very useful for the following massive data analysis from the CR-39 detectors.

Experimental and numerical investigations on ion acceleration from near-critical gas targets

“…CR-39 or Columbia resine #39 is a polycarbonate plastic (whose chemical formula is C 12 H 18 0 7 ) commonly used in laser-plasma experiments to characterize beams of neutrons and diverse ions, taking profit of their low sensitivity to photons and electrons [199]. CR-39 is a transparent plastic at visible wavelengths and it is used in industry for the fabrication of glasses.…”