The application of the curved-grid technique to a gas proportional scintillation counter with a small-diameter photo-multiplier tube
| Autor: | C.M.B. Monteiro, J.M.F. dos Santos, C.A.N. Conde, Alexandra Dezzani Soares, R.E. Morgado |
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| Rok vydání: | 1998 |
| Předmět: |
Physics
Nuclear and High Energy Physics Photomultiplier Small diameter Physics::Instrumentation and Detectors business.industry Resolution (electron density) Detector Solid angle Grid Optics Nuclear Energy and Engineering Scintillation counter Electrical and Electronic Engineering business Energy (signal processing) |
| Zdroj: | IEEE Transactions on Nuclear Science. 45:229-233 |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/23.682385 |
| Popis: | The curved-grid technique was developed to maintain the superior performance of large-area gas proportional scintillation counters (GPSCs) without resorting to complex and bulky focusing systems or large photomultiplier tubes (PMTs) for applications in energy-dispersive X-ray fluorescence analysis. The technique is a simple method to compensate for the variation in solid angle viewed by the PMT as a function of the radial distance from the cylindrical axis of the detector. The feasibility of the technique is demonstrated in a GPSC, by measuring the energy resolution as a function of entrance window diameter. With a properly shaped curved grid, no degradation in detector energy resolution is observed even when the effective detector sensitive area is increased approximately six-fold. The maximum ratio of detector entrance window to PMT diameter achieved thus far is approximately 0.75. |
| Databáze: | OpenAIRE |
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