Photomultiplier nonlinear response in time-domain laser-induced luminescence spectroscopy

Quimica nova

Schip, Leandro José Bossy¹  Buzelatto, Bruno Phelippe¹  Dias Jr., Lauro Camargo¹  Batista, Fábio Roberto¹  Novo, João Batista Marques¹  Cunha, Carlos Jorge da¹ 

[1] Universidade Federal do Paraná, Curitiba, Brasil

关键词: photomultiplier;    time-resolved;    laser-induced luminescence.;   

DOI  :  10.1590/S0100-40422007000100034

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

A new procedureto find the limiting range of the photomultiplier linear response of a low-cost,digital oscilloscope-based time-resolved laser-induced luminescence spectrometer(TRLS), is presented. A systematic investigation on the instrument responsefunction with different signal input terminations, and the relationship betweenthe luminescence intensity reaching the photomultiplier and the measured decaytime are described. These investigations establish that setting the maximumintensity of the luminescence signal below 0.3V guarantees, for signal inputterminations equal or higher than 99.7 ohm, a linear photomultiplier response.

【 授权许可】

CC BY