Next: &MSETUP
Up: Input Records
Previous: &TARGET
This record is used to describe the simulation model and related quantities.
AHISV --- Maximum Depth Simulating Auger Electrons
This variable specifies the maximum depth for Auger electron generation.
Auger electrons which are generated in a depth greater than specified in
AHISV from sample surface are neglected. See Chapter A.5
for more detailed information.

AUGMUL --- Auger Electron Multiplication Factor
This variable actually describes the amount of CPU time which is to be spent
simulating Auger electrons. For more information refer to Chapter A.5.

FMAT --- Filenames of Dielectric Data
This variable is a string specifying the datafiles of each region which
contain the dielectric data to be used when simulating plasmon losses.
Dielectric data is required to use the direct simulation model and
in simulating Auger electrons. Appropriate file names are: "mat".diel
Possible materials ("mat") can be found in Table A.1.

ION --- Ionization of Shells
This variable specifies the shells of the atoms to be explicitly taken into
account for the calculation of ionizations. In that way it is possible to
explicitly take ionizations into account during the simulation although
their generation is not needed for any output specified in the input deck
(see Chapter 9.9). Additionally, all shells specified
in the &OUTPUT namelist for output to the screen or to a file and all
shells which have to be taken into account according to the specification of
characteristic x-ray lines in XCHAR are automatically taken into account.
This means that shells specified for output in &OUTPUT do
not need to be specified here. ION(I) is a string specifying the element
(chemical abbreviation) EL and then the shell(s) SH, all separated
by commas: ION(I)='EL,SH,SH,...'. I is only a running index. Possible shells
are: K, L1, L2, L3, M1, M2, M3, M4, M5. Additionally, all shells may be
chosen at once by specifying 'ALL' or '*', all L-shells by specifying 'L', and
all M-shells by specifying 'M'. All elements of the target (according to
ATOM in &TARGET) may be chosen by simply specifying 'ALL' or '*'
instead of the chemical abbreviation. For a compact overview of possible
methods of specifying ionizations see Table 9.4.

IONCRS --- Ionization Cross Section
This variable specifies the ionization cross section which should be taken
for the calculation of ionizations (and characteristic x-rays) when the
single scattering model, SIN (see MODR), is applied. Two different
ionization cross sections may be chosen, one from Gryzinski ( GRY) and
the other one from Pouchou ( POU) (see Chapter A.2). If in
at least one region the hybrid model ( HYB) is specified then the
Gryzinski ionization cross section ( GRY) is automatically applied
in all regions where the single scattering model ( SIN) is taken. This
guarantees consistent results since the Gryzinski ionization cross section
is applied for taking into account inelastic scattering in the hybrid
model ( HYB). For more information on the implemented models see
Chapter A.

LSECON --- Simulation of Secondary Electrons
This variable specifies whether secondary electrons shall be simulated.
If set to try then secondary electrons are simulated. The default value
is F.

MODR --- Model in Region
This variable specifies which model be to applied to the different regions.
If no model is explicitly specified then the model according to the
TECHQU and/or SIGNAL key in the &INIT record is taken
(see Tables 9.2 and 9.1).
If a model is only explicitly specified for the first region then the same
model will be also applied to all other regions. Three different models are
implemented in version 1.1, a single scattering model ( SIN), a hybrid
model ( HYB) and a direct simulation model ( DIR). For more
information concerning these three models see Appendix A. The
default model is SIN for the Signals XC and IO,
HYB for BE and TE, and DIR for SE and AE.
For more information on SIGNAL see
Chapter 9.1, the description of the &INIT namelist.

STOPP --- Stopping Power
This variable specifies the stopping power which should be taken to
calculate the energy loss of electrons if either the single scattering
model, SIN (see MODR), or the hybrid model, HYB (see
MODR), is applied. Two different stopping power formulas may be chosen,
one from Luo and Joy ( LUO) and the other one from Bethe ( BET)
In both cases the stopping power for energies higher than 60 keV are calculated
using the relativistic Bethe stopping poser formula. For more information on
the implemeted sopptin power euations see Chapter A.2. For low
energies the Luo and Joy expression seems to give somehow better results.
Therefore this formula is taken as the default stopping power.

XCHAR --- Characteristic X-ray Line(s)
This variable specifies the characteristic x-ray lines to be taken into
account during the simulation additionally to the lines specified by one
of the possible variables of the &OUTPUT namelist (see Chapter
9.9). XCHAR(I) is a string specifying the element (chemical
abbreviation) EL and then the characteristic x-ray line(s) CL,
all separated by commas: XCHAR(I)='EL,CL,CL,...'. I is only
a running index. Possible lines are: Ka1, Ka2, Kb, La1, La2, Lb1, Lb2, Lb3,
Ma, and Mb. Additionally, all lines may be chosen at once by specifying 'ALL'
or '*', all K-alpha lines by specifying Ka, all L-lines by specifying 'L',
all L-alpha lines by specifying La, all L-beta lines by specifying Lb, and
all M-lines by specifying 'M'. All elements of the target (according to
ATOM in &TARGET) may be chosen by simply specifying 'ALL' or '*'
instead of the chemical abbreviation. For more information on such
specifications and their default values see Table 9.5

Next: &MSETUP
Up: Input Records
Previous: &TARGET
Horst Wagner
Tue Mar 19 10:24:55 MET 1996