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Boron spectral line ratios helpful to characterize wall conditioned tokamak plasmas

Bishu Agarwal1, Ram Prakash1, Jalaj Jain1, Vinay Kumar2 and P Vasu2

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The intensity ratios of spectral lines of a single species are often used as diagnostics for inferring the electron temperature or density in plasmas. Helium is a well-known example. In this paper, the atomic data and analysis structure (ADAS) database has been used to identify line ratios in boron that might prove useful for plasmas created in tokamaks for the wall conditioning of plasma-facing-surfaces. Using the collisional radiative (CR) model-based photon emission rate coefficients, a few line intensity ratios selectively sensitive only to temperature and those that are sensitive to density are presented.


PACS

52.55.Fa Tokamaks, spherical tokamaks

52.25.Jm Ionization of plasmas

Subjects

Plasma physics

Dates

Issue 5 (November 2009)

Received 25 July 2009, accepted for publication 2 October 2009

Published 4 November 2009



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