Amy Wendt edited untitled.tex  over 8 years ago

Commit id: faf781cad9884947331242ba27e7cdcfc450298f

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Developing an emission model for a molecular gas introduces both new scientific challenges and new potential rewards. Plasmas formed in diatomic gases contain many more species than rare gas plasmas, including atoms, diatomic molecules, larger molecules and metastable neutral species, as well as positive and negative atomic and molecular ions, some or all of which may undergo collisions leading to photon emission. As a result, emission models for such plasmas must include mechanisms not relevant for rare gas plasmas, such as electron collisional dissociative excitation as well excitation resulting from recombination of positive and negative ions. Many of these species are critically important in industrial applications, and an emission model including this mechanisms may enable determination of the concentration of multiple species, i  Oxygen has been selected as the primary focus for the development of the OES-based diagnostic. Methods developed will be adapted later in the study to other diatomic gas plasmas such as N$_2$ and H$_2$.   Low pressure plasmas generated in pure oxygen have technological significance in a number of industrial applications. Oxygen and oxygen containing plasmas are in use or under development for a wide array of applications, including materials applications such as  etching of polymers,  photoresist removal in semiconductor manufacturing,  ion implantation and  surface modification. Ozone?  [{\bf REFERENCES TO BE ADDED HERE] HERE}]  Such processes rely on the interaction of neutral radicals, O$^+$ and O$_2^+$ with substrate surfaces exposed to the plasma. In many applications, achievement of process goals is sensitive to the relative fluxes of the different gas phase species to the substrate surface. Production of ion and neutral radical species occurs primarily through gas phase reactions involving collisions with energetic electrons, so that production {\it rates} are sensitive functions of electron density and electron temperature.Ozone.  We propose an new outreach activity to increase public awareness of plasmas and their application, in partnership with the Rocket Club at Madison West High School (letter of collaboration included as ``supplementary documentation''). Our group will work with Rocket Club members to create a hands-on display with a demonstration and description of ion thrusters for spacecraft propulsion, to be integrated into the club's existing outreach exhibit. As club participants, West High students engage in rocket competitions, local public outreach events and fund raising to support the club's activities. The club, founded in 2003, regularly participates in national competitions, including the Team America Rocket Challenge and the NASA Student Launch program, and has won numerous awards. Student members interact with the public through their exhibit at annual public outreach events, including the Wisconsin Science Festival and the University of Wisconsin Physics Fair, as well as visits to schools and other groups. The current multifaceted exhibit includes rockets and payloads designed and built by the club as well as a ``build your own'' activity; designing and launching pneumatic paper rockets is a popular activity among visitors all ages.