ArI/ArII laser induced fluorescence system for measurement of neutral and ion dynamics in a large scale helicon plasma.
Rev Sci Instrum
; 87(11): 11E560, 2016 Nov.
Article
en En
| MEDLINE
| ID: mdl-27910400
ABSTRACT
In order to investigate the role of both neutral and ion dynamics in large-scale helicon discharges, a laser induced fluorescence (LIF) system capable of measuring both ArI and ArII fluorescence using a single tunable laser is being developed. The system is based on a >250 mW solid state laser. For ArI measurements, the laser pumps the metastable (2P03/2)4s level to the (2P01/2)4p level using 696.7352 nm light, and fluorescence radiation from decay to the (2P01/2)4s level at 772.6333 nm is observed. For ArII, currently in development, the metastable (3P)3d 4F7/2 level will be pumped to the (3P)4p 4D07/2 level using 688.8511 nm, and decay fluorescence to the (3P)4s 4P5/2 level at 434.9285 nm measured. Here all wavelengths are in a vacuum.
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Base de datos:
MEDLINE
Idioma:
En
Revista:
Rev Sci Instrum
Año:
2016
Tipo del documento:
Article
País de afiliación:
Estados Unidos