Improvement of detection limit for hydrogen in high-resolution ERDA by using scanning solid state detector
| Autor: | T. Tamura, Daiichiro Sekiba, Isao Harayama, Satoshi Ishii, Kazuhide Ozeki |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Nuclear and High Energy Physics Materials science Hydrogen business.industry Scattering 020208 electrical & electronic engineering Monte Carlo method Detector chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Data acquisition Optics Deuterium chemistry 0202 electrical engineering electronic engineering information engineering Particle 0210 nano-technology business Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 456:74-79 |
| ISSN: | 0168-583X |
| DOI: | 10.1016/j.nimb.2019.07.007 |
| Popis: | We demonstrated a position-sensitive-like detector (PSD) based on a scanning solidstate detector (scanning-SSD) in HERDA for improvement of detection limit for hydrogen. The new detection system enables us to separate the signals of interest from background noises, which can be attributed to the signals produced by particles of non-interest, by measuring the particle energies from a detected position and SSD outputs. As results, we succeeded to improve the detection limit for hydrogen and deuterium down to 2.0 × 1019 at./cm3 (~0.02 at.%) and 1.6 × 1020 at./cm3 (~0.16 at.%) with the data acquisition time of ~220 s and 120 s at each position of the SSD, respectively. The main contributions to the improvement of the detection limits are the high detection efficiency of the new detection system and the removal of stray particles, which mainly consist of low energy H0 and H+. We simulated the leading edge shape of the obtained HERDA spectra of hydrogen by SIMNRA and Monte Carlo simulation (CORTEO). The comparative studies between the experiments and simulations revealed the non-negligible contribution of H+ recoils generated by multiple scattering. |
| Databáze: | OpenAIRE |
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