66th Annual Gaseous Electronics Conference
September 30 - October 4, 2013 • Princeton, New Jersey

Special Sessions

Five special sessions will be held in conjunction with GEC 2013. Registration for these sessions is complimentary. Titles, organizers, and a brief summary are listed below:

Title: Plasma-Surface Interactions: From Fusion to Semiconductor Processing
Organizers: Yevgeny Raitses (Princeton Plasma Physics Laboratory), Vincent M. Donnelly (University of Houston), David B. Graves (University of California -Berkeley), Greg de Temmerman (Dutch Institute for Fundamental Energy Research)
Date: Monday, September 30 (all day)
Room Location: TBD

This all-day workshop represents a unique opportunity to foster greater communication between the gaseous electronics community and the magnetic fusion research community. Over the past decades both communities have made remarkable progress in understanding and controlling plasma-surface interactions with applications to low-temperature plasma and fusion devices. However, there has been relatively little communication between the fields and this represents a rich opportunity for mutual progress. The two communities often deal with plasma environments near the walls that are surprisingly similar in many ways. For this reason, there are great opportunities for fruitful exchanges of ideas and methodologies that could benefit both fields. This is the major goal of the workshop. The focus will be on identifying the open questions of theory, simulations and experiments pertaining to plasma surface interactions in each field. These include modeling, in-situ and ex-situ diagnostics of physical and chemical processes on plasma-facing surfaces, active boundaries to control plasma fluxes, heat load to the wall and details of surface chemistry. The workshop will include speakers focusing on different sides of this field: plasma physics, materials sciences and applications. After a series of invited talks, there will be a roundtable discussion with the audience and all invited speakers, in an attempt to trigger exchange and collaborations.

Title: Weakly-ionized non-equilibrium air plasma at moderate and high pressures: generation and maintenance, modeling, diagnostics and applications
Organizers: Mikhail Shneider, Richard Miles (Princeton University), and Greg Fridman (Drexel University)
Date: Monday, September 30 (1:30 pm – 5 pm)
Room Location: TBD

Atmospheric pressure non-equilibrium plasmas in air are used in a wide range of applications, notably plasma medicine and aeronautics. A primary challenge for these applications is to create a desired non-equilibrium plasma in air by preventing the discharge transition into an arc. Workshop speakers will review current state-of-the-art of methods for generation and maintaining of such plasmas. Tutorial talks will discuss all research components needed to describe non-equilibrium plasmas in air: relevant plasma physics, chemistry, and numerical methods for modeling and modern diagnostics. Considerable attention will be paid to novel remote nonperturbing diagnostic methods that are crucial for providing detailed information on properties of these plasmas. Applications of non-equilibrium plasma discharges in air, including flow control for aeronautics, plasma medicine, ozonators, etc. will be reviewed. Many issues to be discussed for air plasmas are also relevant to various other molecular gas plasmas.

Title: Mysteries and Challenges of Negative Ion Sources
Organizers: Robert F. Welton (Oak Ridge National Laboratory), Rod Boswell (The Australian National University), Larry Grisham (Princeton Plasma Physics Laboratory)
Date: Tuesday, October 1 (all day)
Room Location: TBD

Ion sources producing beams of negative hydrogen isotopes have become increasingly prominent in accelerator applications, such as, for instance, the Spallation Neutron Source.  They have also become the necessary choice for neutral beam injection systems to heat and drive current in the magnetically confined plasmas of large experimental nuclear fusion devices, because the required beam velocity is too great for efficient conversion to energetic atomic beams by charge exchange of positive ions in neutralizer cells.  Negative ion sources of a variety of species are also being used to produce ion beams for a variety of other applications, such as surface physics studies.

This one-day workshop is intended to draw together those working with negative ion sources to discuss the state of the field, and more importantly, what they see as the challenges and unknowns. The intent is to gather thoughts and suggestions from different negative ion source endeavors which might be of benefit in clarifying the processes governing the operation, performance, and beam extraction of negative ion sources.  It is expected that the workshop will start with a small number of overview talks, with at least half of each overview discussing what aspects of negative ion source development in that field are least understood.  The rest of the workshop will be devoted to discussions by all participants of the issues raised in the overview talks and of other issues, which participants see as important.

Title: 3nd GEC Workshop on Plasma Data Exchange Project
Organizers: Leanne Pitchford (Laplace CNRS and University of Toulouse), William G. Graham (Queen's University Belfast)
Date: Tuesday, October 1 (afternoon)
Room Location: TBD

This is the third in a series of workshops designed to foster the Plasma Data Exchange Project (PDEP), an informal community-wide effort for archiving, identifying, exchanging, accessing and evaluating collision data needed for low-temperature plasma modeling and interpretation of experiments.   The workshop and the PDEP project itself are open to all members of the GEC community.   The focus topic for the workshop this year is collision data for water vapor and other complex molecules.   The workshop will include invited talks followed by a panel-lead, open discussion.  As in previous years, all GEC participants are encouraged to submit additional contributions in the sorting topic “plasma data exchange project” for poster presentation in regular sessions of the GEC.  This year presentations featuring work on cross sections, rates and scaling rules for water vapor and other large molecules and processes at the plasma-water interface are particularly encouraged.  An author of each such poster contribution will have an additional opportunity to present a 1 minute/1 slide summary of their work at the workshop which will be prior to their presentation.

Title: Scientific Legacy of Arthur Phelps (1923-2012)
Organizers: Biswa N. Ganguly (Air Force Research Laboratory, Wright-Patterson), James E. Lawler (University of Wisconsin-Madison), Leanne Pitchford (Laplace CNRS and University of Toulouse)
Date: Friday, October 4 (1:30-4 PM)
Room Location: TBD

In recognition of the many outstanding contributions made to the field of gas discharge physics by Dr.  Arthur Phelps over the course of his lifetime, the GEC will hold a special session on 4th October 2013, 1:30-4 PM.  Six invited speakers  who had close collaboration with Dr. Phelps  have been chosen to speak on topics including vibrational excitation of nitrogen and its importance in breakdown processes;  metastable atoms, atoms in resonant levels, and the importance of multi-step processes in the ionization and power balance of non-LTE discharge plasmas;  expansion of swarm experiments at JILA to microplasma research;  heavy particle impact excitation and ionization processes in very high E/n discharges;  and electron scattering cross sections for plasma modeling.  The invited speakers are:
1. Stephen Buckman, The Australian National University
2. James Lawler, University of Wisconsin
3. John Lowke, CSIRO, Australia
4. Zoran Petrovic, University of Belgrade, Serbia
5. Kunihide Tachibana, Osaka Electro-Communication University, Japan
6. Leanne Pitchford, CNRS and University of Toulouse, France