NDLI: Experimental measurements of the dynamic electric field topology associated with magnetized RF sheaths in hydrogen and helium discharges

Content Provider	IEEE Xplore Digital Library
Author	Martin, E.H. Shannon, S.C. Caughman, J.B.O.
Copyright Year	2012
Description	Author affiliation: NCSU, Raleigh, NC 27529 USA (Martin, E.H.; Shannon, S.C.) \|\| ORNL, Oak Ridge, TN 37831 USA (Caughman, J.B.O.)
Abstract	Summary form only given. The dynamic Stark effect is a phenomenon in which photon(s) associated with an oscillating electric field are absorbed or emitted with the photon associated with an electronic transition. This multiphoton process leads to the formation of satellites in the spectrum at integer multiples of the frequency associated with the dynamic electric field. Utilizing the dynamic Stark effect the time varying electric field in a driven plasma sheath can be determined from the time-averaged and phase resolved emission spectra. Currently two methods are used to calculate the emission spectrum associated with an atomic system in the presence of a dynamic electric field: the quasi-static method and the Floquet method. The quasi-static method assumes that time varying field varies slowly enough that DC Stark effect theory can be used to generate integrated Stark profiles over the period of a time varying field. The Floquet method treats the dynamic multi-photon process and presents a more accurate treatment of the Stark profile dependence on transient field characteristics, particularly at higher frequencies. The methodology and applicability of the quasi-static and Floquet methods will be discussed with respect to sheaths driven in the RF range of frequencies. This work presents experimental measurements of line profiles in the RF sheath for both hydrogen and helium discharges in the presence of a DC magnetic field. The RF sheath electric field parameters are determined utilizing a generalized dynamic Stark effect model and a novel line shape analysis package.
File Size	75776
File Format	PDF
ISBN	9781457721274
ISSN	07309244
e-ISBN	9781457721298
e-ISBN	9781457721281
DOI	10.1109/PLASMA.2012.6384077
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-08
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric fields Radio frequency Stark effect Magnetic field measurement Hydrogen Helium Discharges (electric)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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