Development of high speed imaging microscope and new software for track detection

IReS semino

Development of high speed imaging microscope and new software for track detection

International conference on nuclear tracks in solid

Measurement of total charge changing cross section of iron nuclei in hydrogen using CR-39 track detector

23rd International Conference on Nuclear Tracks in Solid

Tracking method for the measurement of projectile charge changing cross-section using CR-39 detector with a high speed imaging microscope

A new method to trace heavy ion trajectories in a stack consisting of interleaved CR-39 plastic nuclear track detectors and target material layers was developed and tested for use in the measurement of projectile charge changing cross-sections of heavy ion fragmentation reactions. A high speed imaging microscope with sophisticated track analysis software was utilized to extract the charge information from multiple ion tracks belonging to a single fragmentation event. The systematic error of trajectory tracing was verified for the measurement system. In order to verify the validity of system, the projectile total charge changing cross-sections for Fe ions on carbon target was estimated and compared with previous experiments at initial beam energy of 1 GeV/n. The result is in good agreement with results obtained by other investigators. This method allows precise and fast measurement of the projectile charge changing cross-section with higher statistics on a level compatible to that of silicon spectrometer measurements

Verification of angular dependence for track sensitivity on several types of CR-39

Angular dependence of track registration sensitivity have verified for four types of CR-39 plastic nuclear track detectors using heavy ion beams. These detectors have been launched with several types of luminescence detectors on Russian segment in the international space station to intercompare of passive radiation dosimeter components from several institutions. CR-39 detectors were irradiated by several kinds of ions with several hundred MeV/u and then etched three different etching conditions. All the etched tracks were analyzed by the high-speed microscope (HSP-1000) with the ellipse fitting software (PitFit). Reduction of sensitivity was observed near the region of the critical angle even for the newly developed detector. Corrections of the sensitivity were made using empirical method to adopt the space radiation measurement.23rd International Conference on Nuclear Tracks in Solid