Short induction gap gas electron multiplier (GEM) for X-ray spectroscopy

• Autor(a) principal: Mir, J. A.
• Data de Publicação: 2007
• Outros Autores: Stephenson, R., Rhodes, N. J., Schooneveld, E. M., Veloso, J. F. C. A., Santos, J. M. F. dos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10316/4378; https://doi.org/10.1016/j.nima.2006.10.228
• topic: Gas Electron Multiplier; Effective gain; X-ray energy resolution

Experimental work was carried out to evaluate the performance of a Gas Electron Multiplier (GEM) operated with a micromesh readout plane that enabled the induction gap to be set at 50 [mu]m. We measured the essential operational parameters of this system using Ar(75%)-isobutane (25%) as the counter gas mixture. The measurements included the effective gain, effective gain stability, and the X-ray energy resolution using a 5.89 keV X-ray source. These studies demonstrated several advantages of the current system when compared with the standard operation, such as lower operational voltages, higher effective gains and improved effective gain stability.