Bulletin of the American Physical Society
65th Annual Gaseous Electronics Conference
Volume 57, Number 8
Monday–Friday, October 22–26, 2012; Austin, Texas
Session GT2: Workshop on Plasma Data Exchange Project |
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Chair: Annarita Laricchiuta, CNR IMIP Bari Room: Classroom 203 |
Tuesday, October 23, 2012 7:00PM - 7:10PM |
GT2.00001: Introduction |
Tuesday, October 23, 2012 7:10PM - 7:40PM |
GT2.00002: State-of-the-Art Experimental Techniques and Results for Low Energy Electron Collisions with Simple Molecules Invited Speaker: Stephen Buckman Electron collisions with simple molecular systems (diatomics and small polyatomics) play an important role in most discharge-based devices and environments. Even in cases where large precursor molecules are involved, say for example in a plasma processing environment, dissociation and dissociative attachment lead to the production of smaller molecules, perhaps radicals, whose interactions can then play an important part in the dynamics of the discharge. This paper will attempt to describe the current state of the art for measurements of processes such as elastic scattering, rotational, vibrational and electronic excitation, dissociative attachment, and ionization of small molecular species by electron impact. Examples of absolute cross sections that arise from such measurements will be provided and compared, where possible, with contemporary theoretical calculations. The collaboration between experiment and theory is of critical importance in the context of ``Plasma Data Exchange,'' as benchmarked theory will play an significant role in providing data for the many, perhaps majority, of processes that cannot be easily measured. [Preview Abstract] |
Tuesday, October 23, 2012 7:40PM - 8:00PM |
GT2.00003: LXCat project: web interface update to the database Invited Speaker: Sergey Pancheshnyi The LXCat project is a community-wide effort to make available, via an open-access website, data needed for modeling low temperature plasmas. More than 20 groups around the world have and are continuing to contribute data to this project which accounts of more than 100 thousand of records for more than 400 species in 2012. One of the project objectives this past year has been to restructure the databases and to rewrite the interface so as to merge into a single project the LXCat databases for electron data with those from ICEcat for ion data. The new structure allows for easy upgrades or extensions to include other data types or output formats. A particular effort this year was devoted to the new implementation of notes section and discussion board that allows users to have an easier access to evaluation results and comments produced by the advising committee of the project and other users. Finally, the results of calculated swarm parameters can now be directly compared with available experimental results. The new site address is http://www.lxcat.net. [Preview Abstract] |
Tuesday, October 23, 2012 8:00PM - 8:30PM |
GT2.00004: The Phys4Entry database Invited Speaker: Annarita Laricchiuta The Phys4Entry DB is a database of state-selected dynamical information for elementary processes relevant to the state-to-state kinetic modeling of planetary-atmosphere entry conditions. The DB is intended to the challenging goal of complementing the information in the existing web-access databases, collecting and validating data of collisional dynamics of elementary processes involving ground and excited chemical species, with resolution on the electronic, vibrational and rotational degrees of freedom. Four relevant classes of elementary processes are considered, i.e. electron-molecule collisions, atom/molecule-molecule collisions, atom/molecule surface interaction and photon-induced processes, constructing a taxonomy for process classification. Data populating the DB are largely originated by the coordinated research activity done in the frame of the Phys4Entry FP7 project, considering different theoretical approaches from quantum to semi-classical or quasi-classical molecular dynamics. Nevertheless the results, obtained in the Bari plasma chemistry labs in years of research devoted to the construction of reliable state-to-state kinetic models for hydrogen and air plasmas, are also transferred to the DB. Two DB interfaces have been created for different {\sl roles} allowed to different {\sl actions}: the {\sc contributor}, uploading new processes, and the {\sc inquirer}, submitting queries, to access the complete information about the records, through a graphical tool, displaying energy or roto-vibrational dependence of dynamical data, or through the {\sl export} action to download ascii datafiles. The DB is expected to have a significant impact on the modeling community working also in scientific fields different from the aerothermodynamics (i.e. fusion, environment, \ldots), making practicable the state-to-state approach. [Preview Abstract] |
Tuesday, October 23, 2012 8:30PM - 9:00PM |
GT2.00005: Roundtable |
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