A curved-grid gas proportional scintillation counter instrumented with a 25-mm ...

• Author(s): Monteiro, C. M. B. ; Morgado, R. E. ; Santos, J. M. F. dos ; Conde, C. A. N.
• Date: 2004
• Persistent ID: http://hdl.handle.net/10316/4449
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): Gas scintillation counter; Xenon gas detector; X-ray detector
• Document Type: Article
• Language: English

Description

The curved-grid technique provides a simple method to compensate for the variation in solid angle viewed by the PMT in large-area gas proportional scintillation counters (GPSC), improving their performance. The scintillation region is delimited by a planar grid and a curved one, whose shape is calculated to produce a radially increasing scintillation yield, compensating for the decrease in the solid angle. In this work, we applied this technique to a GPSC instrumented with a PMT having a 25-mm diameter photocathode. The maximum ratio of the detector entrance window to the photocathode diameter thus far achieved, without significant performance degradation, is 1. http://www.sciencedirect.com/science/article/B6TJM-4BGHBBC-7/1/c14386d3eec5725f748ed10adcb3d1d6