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Hrtem Silicon

Absorption coefficient measured by PDS in samples deposited at 30 C by the decomposition of a 7 silane-in-argon gas mixture. silane and annealed between 300 C and 600 C for 1 hour 15 have shown the formation of ring-like and fringe-like contrast features similar to those reported in Figure 7. Moreover, we have reported similar results for films deposited from silane-hydrogen mixtures at 100 C 38, 39 , Figure 7. HRTEM of a silicon film produced by the decomposition of a 2...

References

Spitzer, L., Jr., Physical Processes in the Interstellar Medium, p. 168. (John Wiley, New York) (1978) 2. Pilipp, W., Hartquist, T. W., Havnes, O. k Morfill, G. E., Astrophys. J. 314, 341 (1987). 3. Cramer, N. F. k Vladimirov, S. V., Publ. Astron. Soc. Australia 14, 170 (1997). 4. Pilipp, W., k Hartquist, T. W., Mon. Not. R. Astron. Soc. 267, 801 (1994). 5. Arons, J. k Max, C. E.,Astrophys. J. 196, L77 (1975). 6. Havnes, O., Hartquist, T. W. k Pilipp, W., Astron. & Astrophys. 217, L13...

Discussion

The damping of the waves shown in Figure 1(b) is due to effects of collisions, between the charged particles and the dominant neutral molecules, on the fast Alfven wave. Other effects can introduce a second, short wavelength, mode into which the fast Alfven wave mode converts at the resonance. Such effects are electron-ion collisions, which introduce the resistive Alfven mode, and thermal effects, which introduce the kinetic Alfven wave. Another effect, which is unique to dust grains, is the...

Instabilities of the dustplasma crystal

Department of Theoretical Physics and Special Research Centre for Theoretical Astrophysics, School of Physics, The University of Sydney, New South Wales 2006, Australia Abstract. The dispersion characteristics of the low frequency mode associated with vertical oscillations of dust grains in a quasi-two-dimensional dust-plasma crystal are calculated, taking into account the dependence of the dust charge on the local sheath potential. It is shown that the equilibrium of the dust grains close to...

General Dispersion Relation

For weak gradients in the equilibrium quantities, a general dispersion relation can be obtained by linearizing Eqs. (l)-(6) together with the charge neutrality condition. Assuming the perturbed quantities to vary as exp i (kyy + kzz u i) , we obtain the dispersion relation 12 3 (u2 - k2zC2DACs) (UJ2 - 4) - uJ2k2yC2DAC3C5 nd0 ( l-1 + kzndos) (cwD + kyc2DAc3c5) + m2dQkyvD, (8) * where UJ u> k v is the Doppler shifted wave frequency, S (dVz dx) nd0 characterizes the shear flow, and 1 70- 2- ' Cs...

Formation of Dust and its Role in Fusion Devices

Institut f r Experimentalphysik II, Ruhr-Universit t, D 44780 Bochum, Germany Dust particles are produced in fusion devices by various plasma-surface-interaction mechanisms. This paper discusses properties of dust collected from fusion devices, some dust generation mechanism and the interaction of dust with the cold edge of a fusion plasma. The potential problems for operation and performance associated with the dust-plasma-interaction are outlined. First attempts aiming at the in situ...

Bcj

Fig. 6 Particle trajectories in the crystal with point defects and dislocations (I-type defects) at n 0.0721cop. (Top view) Fig.7 Kinetic energy of particles as function of friction for the crystals with I-type defects (solid circles), with extra particles (open circles), and the experiment data (squares). It contains uncorrelated dislocations with Burgers vector equal to 2. The crystal has also a lot of defects near the external boundary, since the hexagonal structure can be fitted in a circle...

Dust Wake in a Collisional Plasma

Lemons, M. S. Murillo and W. R. Shanahan Applied Theoretical and Computational Physics Division Los Alamos National Laboratory Los Alamos, NM 87545 USA Abstract. We study the interaction between a stationary dust grain in a flowing, collisional plasma. An expression for the wake potential is derived and compared with results from particle-in-cell simulations that treat the flowing plasma ions as discrete particles which are collisionally coupled to the...

Nuclear Induced Dusty Plasma Structures

Fortov, Alexandr V. Khudyakov, Vladimir I. Molotkov, Anatoly P. Nefedov, Vladimir A. Rykov, High Energy Density Research Center, Russian Academy of Sciences, Izhorskaya 13 19, 127412, Moscow, Russia Abstract. We have performed for the first time experiments in the nuclear-induced plasma with micron-sized dust macroparticles injected into it. The plasma was formed in the atmospheric air by alpha-particles and fission fragments of 252Cf as well as by beta-active...

Anomalous Diffusion and Finite Size Effect in Strongly Coupled 2D Dust Coulomb Clusters

Department of Physics and Center for Complex Systems, National Central University, Chungli 320, The particle diffusion in a strongly coupled 2-D dust Coulomb cluster is studied. In the center region, the motion shows behaviors similar to the infinite large system, such as the isotropic motion with an initial caged antipersistent difiusion and the transition to the persistent difiusion driven by the vortex type excitation at larger time. In the outer region, the motion is no longer isotropic....

Zjd t1WW r

Which differs from the SLFC form previously used 4 by the term 3q2 qd and the second factor. For the physically interesting case of q2rd 0.5, Fig. 1 shows the FIGURE 1. Approximate dispersion relation for a 200 dusty plasma. The top (dot-dash) curve is the weakly coupled dust acoustic result. The lower (dashed) curve 4 is based on the SLFC. The middle (solid) curve is based on the results of this paper and indicates the correction that arises from extending the theory to finite frequencies and...

Effect Of Gravity

In the arc reaction with He gas, strong heat convection takes place and reaction time in the high temperature gas is limited by the convection speed.9 Therefore, if the arc reaction is carried out in gravity-free condition, high-temperature reaction time is I Arc Reaction without Heat Convection Carbon molecules are quikly folwn up 'Bigger and heavier molecules stay longer by the heat convection. time depending on the thermal diffudion FIGURE 3. Models of flow of sublimated carbon vapor for two...