1. Characterize Surface / Particle Interactions in Space Environment
Coupled Materials and Plasma Processes Far From Equilibrium
Characterize Surface / Particle Interactions in Space Environment
Levin, Van Duin, (Penn State), Rajan (Iowa State) , Sedwick (UMaryland)17-20
damage on a lens surface due to the ice crystals
Ice cluster formation
Please be clear when you addnotes
Ice cluster, what dominates the size , you say Temp, when presssure goes up as temp. just be clear?
I am waiting for new figures to elobarate on ray’s comments
Damage from Ion/Radiation/Electron Exposure
Silicon microtips immersed in Argon ion beam

2. Discovery of Sub-Oxide formation
Coupled Materials and Plasma Processes Far From Equilibrium
Discovery of Sub-Oxide formation
Rajan (Iowa State) and Van Duin (Penn State)
Atom Probe Tomography
Damage on solar array from atomic oxygen
383 K
Increased suboxide formation
suboxide
Surface
Surface Si
Surface
Oxygen 40 60 20
Suboxide SiOx
Silicon oxide SiO2
SiO2
Depth (A)
Surface
So what siO2, what affect on arrays?
We know suboxides, but don’t know what it does
ReaxFF Simulation

3. References T Crosby and N Ghoniem, J. Comp. Mech. 50:159–168 (2012).
T Crosby & N Ghoniem, JNM 442 (1-3) , 2013.
Z Chen, N Ghoniem, APS Bulletin, 58, Abstract ID: BAPS.2013.MAR.
R Harb, E. Tacirogulu, and NM Ghoniem,” Acta Mater., 61(5), 1454, 2013.
Z Chen, N Ghoniem ,Phys Rev, B 88 (3),035415, 2013.
A. Takahashi & NM Ghoniem, Phil Mag, 93(20), 2662, 2013.
G. Po & NM Ghoniem, “A variational formulation of constrained dislocation dynamics coupled with heat and vacancy diffusion,” JMPS, Accepted, 2013.
G. Po, D. Seif, NM Ghoniem, & M. Lazar, “Dislocation dynamics without singularities,” JMPS, submitted, 2013.
D Rivera, T Crosby, A Sheng, N M. Ghoniem, “Experimental characterization & surface fracture modeling of W in plasma transients,” JNM, submitted.
NM Ghoniem, A. Sehirliioglu, A. Neff, JP Allain, B. Williams, “Sputtering and Amorphization in Molybdenum and Tungsten Nano-pillars Irradiated with Low-energy Argon Ions,” JAP, submitted.
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EPC ; IEPC ,132
A. Borner, Z. Li, and D. Levin, “Development of a Molecular-Dynamics-Based Cluster-Heat-Capacity Model for Study of Homogeneous Condensation in Supersonic Water-Vapor Expansions,” The Journal of Chemical Physics, Jan. 23, 2013, Vol. 138, Issue 6, Feb. 2013, (2013).
A. Borner, Z. Li, and D. Levin, “Comparison of DSMC and Experimental Results of H2O Supersonic Condensed Jets,“ AIAA paper , AIAA 44th Thermophysics Conference, June 2013, San Diego, CA.
B. Korkut, P. Wang, Z. Li, and D. Levin, “Three Dimensional Simulation of Ion Thruster Plumes with AMR and Parallelization Strategies,” AIAA paper , 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, July, 2013, San Jose, CA.
B. Korkut, D. Levin, J. Young, and R. Sedwick, "Comparison of Ion Thruster Plumes Generated in the SPPL-1 Facility with DSMC-PIC Simulations with AMR," AIAA Science and Technology Forum and Exposition, January 2014, National Harbor, MD, AIAA
Meier, E.T., et al. "Development and validation of a two-fluid plasma-neutral model", Innovative Confinement Concepts (2011).
Matsuzawa, Y., et. al, “Effects of background neutral particles on a field-reversed configuration plasma in the translation process”. Phys. Plasmas 15, (2008).
Lutkenhaus JL et al. Journal of Materials Chemistry A. 2013;1(26):
Lutkenhaus, JL et al. Physical Chemistry Chemical Physics 15 (24), (2013)
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