Study of particle transport and gas amplification mechanism in proportional counters
| Autor: | Lin Tang, Fang Fang, Weicheng Ding, Songke Yu, Zhong Xiaojuan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Radiation Proportional counter Electron Mechanics 010403 inorganic & nuclear chemistry 01 natural sciences Boltzmann equation Space charge 030218 nuclear medicine & medical imaging 0104 chemical sciences 03 medical and health sciences Electron avalanche 0302 clinical medicine Continuity equation Stopping power (particle radiation) Critical radius |
| Zdroj: | Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 170 |
| ISSN: | 1872-9800 |
| Popis: | Gas amplification is an essential feature of the proportional counter. The Boltzmann equation and the Townsend ionization coefficient are introduced to describe the behavior of electrons and the gas amplification in proportional counters, respectively. However, it is difficult to solve the Boltzmann equation completely and to obtain the critical radius at which electron avalanche begins. Therefore, we try to employ the Continuity equation and the linear stopping power to derive the distribution of particles and the critical radius. The space charge effect was also investigated to understand its influence on the gas amplification of the proportional counter. Finally, the gas amplification was calculated based on the classical theory of electron transport. The results indicate that the theoretical value is in good agreement with the experimental data. This means that the continuity equation and the linear stopping power can be used to depict the particle transport and gas amplification mechanism in proportional counters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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