Comparative Study of Electric Field Measurement in Glow Discharges using Laser Optogalvanic Spectroscopy
- National Tokamak Fusion Program P.O. Box 3329 Islamabad Pakistan (Pakistan)
- Optics Laboratory PINSTECH Nilore Islamabad (Pakistan)
- Atomic and Molecular Physics Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
The net electric field inside low-pressure glow discharges has been measured using laser optogalvanic spectroscopy of 1s2s {sup 1}S{sub 0}{yields}np{sup 1}P{sub 1} Rydberg series of atomic helium. Three different types of discharges, an inductively coupled RF discharge cell operating at 4 MHz, a homemade DC discharge cell and a commercial see-through hollow cathode lamp have been used for these studies. The Rydberg series terminates earlier in the high electric field discharge as compared to that in the low electric field discharge. The net electric field also produces shift and broadens the observed spectral lines especially in the high lying Rydberg transitions. The electric field has been determined from the series termination and also from the energy shift of the observed transitions.
- OSTI ID:
- 21251550
- Journal Information:
- AIP Conference Proceedings, Vol. 1058, Issue 1; Conference: 19. international conference on spectral line shapes, Valladolid (Spain), 15-20 Jun 2008; Other Information: DOI: 10.1063/1.3026435; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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