MHSP with position detection capability

• Autor(a) principal: Luz, H. Natal da
• Data de Publicação: 2007
• Outros Autores: Veloso, J. F. C. A., Mendes, N. F. C., Santos, J. M. F. dos, Mir, J. A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• DOI: 10.1016/j.nima.2006.10.243
• Texto Completo: http://hdl.handle.net/10316/4379; https://doi.org/10.1016/j.nima.2006.10.243
• topic: Micro Hole and Strip Plate; Gas Electron Multiplier; X-ray detector; Position sensitive; Resistive charge division; Analogue division

The first implementation of a position sensitive readout for a Micro Hole and Strip Plate (MHSP) is described and tested. The readout consists on a resistive layer crossing the anodes and connected to a preamplifier on each side. By weighing the charge pulses on both preamplifiers it is possible to determine the interaction point. A 100-200 [Omega] resistance layer between consecutive strips was found to be the best compromise between position linearity and energy resolution. Preliminary results using 22.1 keV X-rays present a good linearity between the measured and the actual position with a mean deviation of about 0.15 mm and a position resolution of 1.6 mm full-width at half-maximum (FWHM), being limited by the analogue division electronic circuit. The performance of the MHSP position detector will be presented and discussed for 1D readout.