Open-cell photoacoustic radiation detector
M D da Silva; I N Bandeira; L C M Miranda; M D da Silva; Lab. Associado de Sensores e Mater., Inst. de Pesquisas Espaciais, Sao Jose dos Campos, Sao Paulo, Brazil; I N Bandeira; Lab. Associado de Sensores e Mater., Inst. de Pesquisas Espaciais, Sao Jose dos Campos, Sao Paulo, Brazil; L C M Miranda; Lab. Associado de Sensores e Mater., Inst. de Pesquisas Espaciais, Sao Jose dos Campos, Sao Paulo, Brazil
Журнал:
Journal of Physics E: Scientific Instruments
Дата:
1987-12-01
Аннотация:
A simple and inexpensive photoacoustic radiation detector requiring no cell machining and minimal preparation is proposed. It consists of the front air chamber of a commercial electret microphone used as the transducer medium itself. The measured noise-equivalent power (NEP) at a modulation frequency of 40 Hz was found to be of the order of 5*10<sup>-7</sup> W Hz<sup>-1/2</sup> for both black-body and visible illumination.
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