量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Particle counting analysis (PCA) with multi-stage scintillation detector shows a new perspective on angularly- resolved spectral characterizations of GeV-scale, multi-species ion beams produced by high-power lasers. The diagnosis provides a mass-dependent ion energy spectrum based on time-of-flight and pulse-height analysis of single particle events detected through repetitive experiments. With a novel arrangement of multiple scintil- lators with different ions stopping powers, PCA offers potential advantages over commonly used diagnostics (CR-39, radiochromic films, Thomson parabola etc.) in terms of coverage solid angle, detection efficiency for GeV-ions, and shot-to-shot analysis in high repetition experiments. The basic detector design was tested using a 230-MeV proton beam from the Heavy Ion Medical Accelerator in Chiba (HIMAC), where we demon- strated its ability to discriminate major ion species accelerated in laser-plasma experiments (i.e. protons, deuterons, carbon and oxygen ions) with excellent energy and mass resolution. The proposed diagnostic concept would be essential for better understanding of laser-driven particle acceleration, which paves the way towards all-optical compact accelerators for a range of applications.
A multi-stage scintillation counter for GeV-scale multi-species ion spectroscopy in laser-driven particle acceleration experiments
