ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

The translational energy distributions for metal atoms and ions produced via visible laser MPD/MPI of group 13 metal alkyls and MPI of aluminum and indium atomic beams (1988)

Callender, C. L. ; Rayner, D. M. ; Hackett, P. A.

Springer

Applied physics 47 (1988), S. 7-15

add to mindlist on the mindlist

Details

ISSN: 1432-0649

Keywords: 32 ; 35

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The nascent translational energy distributions of group 13 metal ions produced via multiphoton dissociation and multiphoton ionization (MPD/MPI) of their trimethyl derivatives and via multiphoton ionization of metal atomic beams have been measured using time-of-flight mass-spectroscopy. In all cases the ion production was isotropic and the translational energy distribution was approximately Boltzmann. For ionization of free aluminum and indium atoms translational temperatures of 6K and 4K were measured, corresponding to most probable velocities of 60 and 24 ms−1. From multiphoton dissociation of trimethylaluminum, trimethylgallium, and trimethylindium, translational temperatures of 1800, 700, and 900 K resulted. These correspond to velocities of ∼1000, 400, and 350 ms−1. A photodissociation mechanism involving elimination of ethane followed by dissociation of monomethyl metal intermediates to produce metal atoms is in reasonable agreement with the experimental data. The nascent velocities of metal atoms and ions from the metal alkyl and metal beam sources are used to assess the potential of these sources for microfabrication of metal structures.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00696202

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Multigrid flow solutions in complex two-dimensional geometries (1991)

Rayner, D.

Chichester : Wiley-Blackwell

International Journal for Numerical Methods in Fluids 13 (1991), S. 507-518

add to mindlist on the mindlist

Details

ISSN: 0271-2091

Keywords: Multigrid ; Body-fitted co-ordinates ; Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: A finite difference solution algorithm is described for use on two-dimensional curvilinear meshes generated by the solution of the transformed Laplace equation. The efficiency of the algorithm is improved through the use of a full approximation scheme (FAS) multigrid algorithm using an extended pressure correction scheme as smoother. The multigrid algorithm is implemented as a fixed V-cycle through the grid levels with a constant number of sweeps being performed at each grid level.The accuracy and efficiency of the numerical code are validated using comparisons of the flow over two backward step configurations. Results show close agreement with previous numerical predictions and experimental data. Using a standard Cartesian co-ordinate flow solver, the multigrid efficiency obtainable in a rectangular system is shown to be reproducible in two-dimensional body-fitted curvilinear co-ordinates. Comparisons with a standard one-grid method show the multigrid method, on curvilinear meshes, to give reductions in CPU time of up to 93%.

Additional Material: 7 Ill.