Accession Number : ADA267478


Title :   Optical Diagnostics of Diamond CVD in DC Arc-Jets


Descriptive Note : Quarterly rept. 16 Oct 92-15 Feb 93,


Corporate Author : SRI INTERNATIONAL MENLO PARK CA MOLECULAR PHYSICS LAB


Personal Author(s) : Jeffries, Jay B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267478.pdf


Report Date : Mar 1993


Pagination or Media Count : 5


Abstract : Dr. Jay B. Jeffries, the Principle Investigator, visited Dr. Richard Woodin of Norton Diamond Films at the Technion facility in Irvine, California on October 26, 1993. Norton's optical diagnostics laboratory was toured and the difficulties of laser-based diagnostics in an industrial environment were considered in detail. During this visit, Norton's plans to observe plasma emission discussed, and the influence of the excitation mechanism which produces the molecular excited states was elucidated. The molecular emission in a chemically reacting plasma can arise from three different excitation mechanisms: thermal emission, electron impact excitation, and chemiluminescent reaction. Each of these excitation mechanisms produces a distinctly different population distribution in the rotational and vibrational levels of the electronically excited state. Each of these mechanisms is briefly discussed here.


Descriptors :   *DIAMONDS , *VAPOR DEPOSITION , EXCITATION , ELECTRON EMISSION , PLASMA JETS


Subject Categories : Mfg & Industrial Eng & Control of Product Sys
      Plasma Physics and Magnetohydrodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE