Optical characteristics of UV–VUV lamps on the electronic-vibrational transitions of the hydroxyl radical pumped by a nanosecond capacitive discharge

High Voltage

Roksolana Gritzak¹  Alexandr Shuaibov¹ 

[1] Uzhgorod National University;

关键词: lamps;    helium;    argon;    heavy water;    ultraviolet spectra;    optical characteristics;    UV–VUV low-pressure lamp;    electronic-vibrational transition;    pumped hydroxyl radical;    nanosecond capacitive discharge;    helium;    argon;    water vapor;    heavy water;    reduced partial pressure;    radiation intensity;    emission characteristics;    wavelength 308 nm;    wavelength 140 nm to 200 nm;    frequency 1000 Hz;    power 1 W;    He-H(2)O;    He-D(2)O;   

DOI  :  10.1049/hve.2016.0092

来源: DOAJ

【 摘 要 】

This paper presents the results of a study of UV and VUV low-pressure lamp pumped by nanosecond capacitive discharge. This lamp works on the mixtures of helium and argon with water vapor (H(2)O) or ‘heavy’ water (D(2)O). At the capacitive low-pressure lamp emission spectra are mainly narrow band 308 nm OH (A–X) and large band in the VUV spectral range: 140–200 nm OH (C, B, A). Found, that the increasing the partial pressure of H(2)O and D(2)O (>130–150 Pa) led to a decrease in the intensity of VUV radiation of hydroxyl radicals. In the transition from He/H(2)O mixture to He/D(2)O mixture, the optimal pressure of helium is decreased. Reduced partial pressure of argon led to increased intensity of radiation of hydroxyl in the VUV range. The study of emission characteristics of OD* – lamps on a mixture of He/D(2)O and the OH* – lamps on a mixture of He/H(2)O showed that the intensity of the bands OD (X, C, A) is 1.5 times larger than the intensity of the bands OH (X, C, A). The maximum absolute intensity of UV–VUV radiation of the lamp (at a frequency of 1000 Hz) reached 1 W.

【 授权许可】

Unknown