Кафедра фізичних основ електронної техніки (ФОЕТ)

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https://openarchive.nure.ua/handle/document/54

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Перегляд Кафедра фізичних основ електронної техніки (ФОЕТ) за автором "Frolova, T. I."

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  • Зображення мініатюри
    Публікація
    Change of the emission spectrum of sulfur lamp when changing the properties of the electromagnetic field
    (ХНУРЭ, 2011) Machekhin, Yu. P.; Frolova, T. I.; Shunkova, I. A.
    The paper is devoted to researching the behavior of the emission spectrum of an electrodeless sulfur lamp when the parameters of the microwave field pumping a system are being changed. Some cases of changes in the magnitude and spatial position of the microwave field antinode are studied. The obtained results make it possible to control the output radiation of the lamp when parameters of the microwave field are changing and monitor the pumping energy on the basis of the emitted spectrum of the sulfur lamp.
  • Зображення мініатюри
    Публікація
    Electrodeless sulfur lamp on the basis of microwave excitation: estimation of spectral effectiveness of radiation for bio-objectsм
    (ХНУРЭ, 2018) Frolova, T. I.
    The paper considers a lighting system based on an electrodeless sulfur lamp with microwave excitation for bio-objects. As a result of the intensive development of new technologies in the field of lighting equipment (LED, HID lamps, and others) it is necessary to replace outdated lighting for a more energy-efficient one, by using new modern lamps of artificial radiation for biological objects (human, animals and plants). The parameters of optical radiation sources for different biological objects are different (for humans and some animals they are based on the sensitivity of the eye (photonic response curve), for plants – it is the photon flux density of photosynthetically active radiation (PAR) from 400 to 700 nm). High-pressure sodium lamps (HPSL) and metal halide lamps (MHL) are the most common among the artificial light sources used in greenhouses. However, at present, the most effective and promising are lighting systems based on LED lamps and the electrodeless sulfur lamp with microwave excitation. The latter is environmentally friendly (it does not contain mercury), with a high efficiency of PAR (72%) and durable (above 60,000 hrs.) Analysis of the spectral efficiency of radiation showed that the electrodeless sulfur lamp with microwave excitation has a high photosynthetic photon flux density (PPFD) (1440 μmol·s-1·m-2) in an optical range of 400-700 nm.