Thermal spike model

The difficulty of synthesizing C-N films makes it crucial to develop and apply theoretical models principally to guide and optimize the design of experimental methods for this purpose. The most widely applied models can be classified into three - thermodynamic, molecular dynamics, and thermal spike models. These models are described below. 

Although the effect of chemical bonding on energy dissipation in chemical systems is not included [54,55], the cylindrical thermal spike model takes into account the specific features of an ion-beam bombardment process such as energy loss and collision cascade. In particular, the individual ion bombardment will induce an initial energy deposited in a finite volume through collision cascades as illustrated in Figure 16.5. 

What is the primary assumption underlying the application of the thermal spike model to ion-beam assisted deposition of C-N materials ... 

Seah, M.P. (2007) Analysis of cluster ion sputtering yields correlation with the thermal spike model and implications for static secondary ion mass spectrometry. Surf Interface Anal., 39, 634—643. 

Lucchese, R. R., Thermal spike model for heavy ion induced desorption from surfaces, J. Chem. Phys., 86, 443-453 (1987). 

Thermally spiked 204 Thermal spikes 195 Three-layer models 152, 174, 175 Three-term models 149 Three-term unfolding model 176,185 Tie molecules 124 Tie-taut molecules 141 Time-dependent hardness 121 Tire cord 6... 

This short thermal shock , followed by fast quenching to relatively low temperature, like thermal spike, originated by a fast fission fragment, produces a lot of OFF defects. Below, after description of potential model applied, we present and discuss results of the above computer simulation experiment. 

Adamson, M.J., A Conceptual Model of the Thermal Spike Mechanism in Qraphite/Epoxy Laminates , The Long Term Behavior of Composites, (K. O Brien, ed.), ASTM-STP 813, ASTM, Philadelphia, 1983, p. 179-191. 

Although it is now commonly conjectnred that a local thermal equilibrium does not effectively describe the ionization/nentralization process/es active in atomic secondary ion formation/snrvival, the possibility of relating modified variations of the LTE concept to the trends resnlting from thermal spike-type processes (see Section 3.2.1.2) has also since been proposed. Likewise, LTE-based arguments have attracted interest in modeling-specific molecular secondary ion yields (see Section 3.3.4). 

Reynolds number, p 46), etc 61-72 (Shock relationships and formulas) 73-98 (Shock wave interactions formulas) 99-102 (The Rayleigh and Fanno lines) Ibid (1958) 159-6l(Thermal theory of initiation) 168-69 (One-dimensional steady-state process) 169-72 (The Chapman-Jouguet condition) 172-76 (The von Neumann spike) 181-84 (Equations of state and covolume) 184-87 (Polytropic law) 188, 210 212 (Curved front theory of Eyring) 191-94 (The Rayleigh transformation in deton) 210-12 (Nozzle thepry of H. Jones) 285-88 (The deton head model) ... 

This effect is more prevalent for large target or ion mass. The spike can be modeled on the basis of a quasi-thermal theory analogous to that for laser or electron beam bombardment at deposited energies of several eV/atom. The important parameter in the thermal cascade is the energy deposited per unit volume. 

Hot spring pools are usually well stirred by thermal convection and rising gas bubbles, so they can be modeled as ideal batch reactors and the volume of water in the pool can be determined using a tracer spike. 

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