Spectroscopy of the regenerative soot |
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Authors: | Shoaib Ahmad |
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Affiliation: | (1) Accelerator Laboratory, PINSTECH, P.O. Nilore, Islamabad, Pakistan, PK |
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Abstract: | The mechanisms and processes of the formation of the regenerative soot in a graphite hollow cathode discharge that produces
and emits carbon clusters are presented. Mass spectrometry with a specially designed E×B velocity filter analyzes the entire range of the charged clusters from C
1 to ∼C
4300. The state of the carbon vapour within the source is evaluated by using the characteristic line emissions from the carbonaceous
discharge whose formative mechanisms depend upon the kinetic and potential sputtering of the sooted cathode. The carbonaceous
discharge generates atomic and ionic C and its clusters C
m (m≥ 2), noble gas metastable atoms and ions, energetic electrons and photons in the cavity of the graphite hollow cathode. The
parameters of soot formation and its recycling depend critically on the discharge parameters, the geometry of the hollow cathode
and 3D profile of the cusp magnetic field contours.
Received 2nd July 2001 and Received in final form 10 September 2001 |
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Keywords: | PACS 34 50 Dy Interactions of atoms and molecules with surfaces photon and electron emission neutralization of ions – 34 80 Dp Atomic excitation and ionization by electron impact – 36 40 Wa Charged clusters |
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