TY  - JOUR
A1  - Otto, Andreas H.
A1  - Schrader, Sigurd
A1  - Steiger, Th.
A1  - Schneider, M.
T1  - Gas phase deprotonation energies of Sulfuric Acid, Perchloric Acid, Chlorsulfuric Acid and Fluorosulfuric Acid
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Otto, Andreas H.
A1  - Prescher, Dietrich
A1  - Gey, E.
A1  - Schrader, Sigurd
T1  - Proton affinities of some polyfluoroalkanes in comparison to the unsubstituted alkanes. The estimation of the proton affinities of polyfluorethylene and polyethylene by applying theoretical methods
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Schrader, Sigurd
A1  - Wortmann, Hanna Rosalie
A1  - Prescher, Dietrich
A1  - Lukaszuk, K.
A1  - Otto, Andreas H.
T1  - Solvatochromy and electro-optical study of new fluorine-containing chromophores
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Otto, Andreas H.
A1  - Steiger, Th.
A1  - Schrader, Sigurd
T1  - HAICI4 in the gas phase is stronger than HTaF6.
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Otto, Andreas H.
A1  - Steiger, Th.
A1  - Schrader, Sigurd
T1  - The gas phase acidity of trifluoromethanesulphonic acid : an ab initio MO and density functional theory study
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Cser, Adrienn
A1  - Donner, Reik Volker
A1  - Schwarz, Udo
A1  - Otto, Andreas H.
A1  - Geiger, M.
A1  - Feudel, Ulrike
T1  - Towards a better understanding of laser beam melt ablation using methods of statistical analysis
N2  - Laser beam melt ablation, as a contact free machining process, offers several advantages compared to conventional processing mechanisms. Although the idea behind it is rather simple, the process has a major limitation: with increasing ablation rate surface quality of the workpiece processed declines rapidly. The structures observed show a clear dependence of the line energy. In dependence of this parameter several regimes of the process have been separated. These are clearly distinguishable as well in the surfaces obtained as in the signals gained by the measurement of the process emissions which is the observed quantity chosen.
Y1  - 2002
SN  - 88-87030-44-8
ER  - 
TY  - BOOK
A1  - Donner, Reik Volker
A1  - Cser, Adrienn
A1  - Schwarz, Udo
A1  - Otto, Andreas H.
A1  - Feudel, Ulrike
T1  - An approach to a process model of laser beam melt ablation using methods of linear and non-linear data analysis
N2  - As a non-contact process laser beam melt ablation offers several advantages compared to conventional processing mechanisms. During ablation the surface of the workpiece is molten by the energy of a CO2-laser beam, this melt is then driven out by the impulse of an additional process gas. Although the idea behind laser beam melt ablation is rather simple, the process itself has a major limitation in practical applications: with increasing ablation rate surface quality of the workpiece processed declines rapidly. With different ablation rates different surface structures can be distinguished, which can be characterised by suitable surface parameters. The corresponding regimes of pattern formation are found in linear and non-linear statistical properties of the recorded process emissions as well. While the ablation rate can be represented in terms of the line-energy, this parameter does not provide sufficient information about the full behaviour of the system. The dynamics of the system is dominated by oscillations due to the laser cycle but includes some periodically driven non-linear processes as well. Upon the basis of the measured time series, a corresponding model is developed. The deeper understanding of the process can be used to develop strategies for a process control.
Y1  - 2003
SN  - 3-928921-88-6
ER  - 
TY  - BOOK
A1  - Donner, Reik Volker
A1  - Cser, Adrienn
A1  - Schwarz, Udo
A1  - Otto, Andreas H.
A1  - Feudel, Ulrike
T1  - An approach to a process model of laser beam melt ablation using methods of linear and non-linear data analysis
N2  - As a non-contact process laser beam melt ablation offers several advantages compared to conventional processing mechanisms. During ablation the surface of the workpiece is molten by the energy of a CO2-laser beam, this melt is then driven out by the impulse of an additional process gas. Although the idea behind laser beam melt ablation is rather simple, the process itself has a major limitation in practical applications: with increasing ablation rate surface quality of the workpiece processed declines rapidly. With different ablation rates different surface structures can be distinguished, which can be characterised by suitable surface parameters. The corresponding regimes of pattern formation are found in linear and non-linear statistical properties of the recorded process emissions as well. While the ablation rate can be represented in terms of the line-energy, this parameter does not provide sufficient information about the full behaviour of the system. The dynamics of the system is dominated by oscillations due to the laser cycle but includes some periodically driven non-linear processes as well. Upon the basis of the measured time series, a corresponding model is developed. The deeper understanding of the process can be used to develop strategies for a process control.
Y1  - 2004
SN  - 3-527-40430-9
ER  -