binaryChargeExchange¶
Works with VSimPD license.
Kind of MonteCarlo interaction that models the charge exchange of two particles of the same atomic element.
Note
This feature replaces the chargeExchange feature, which was previously implemented in the Vorpal Collision feature.
Note
Caution should be exercised when using binaryChargeExchange reactions in the Monte Carlo framework with variable-weight species kinds; the results may be unreliable. Consider using the newer Reactions framework instead.
binaryChargeExchange Parameters¶
- crossSection (string)
Cross section to be used in the interaction. Possible values are
builtIn
orfunctionDefined
. See below for required parameters for each choice.
- inSpeciesA (string)
Name of the first input species participating in the charge exchange interaction.
- inSpeciesB (string)
Name of the second input species participating in the charge exchange interaction.
- outSpeciesA (string)
Name of the output species resulting from particle inSpeciesA exchanging charge with inSpeciesB.
- outSpeciesB (string)
Name of the output species resulting from particle inSpeciesB exchanging charge with inSpeciesA.
builtIn Parameters¶
Please see Types of collisions for the available
builtIn
gases.
The builtIn
option is based on the semi-empirical formula
from [LS05] for all gas types except Xe and Ar. For Xe and Ar background
neutral gases the builtIn
cross section data is used from the data
found in experiments by [MPL+02].
If the builtIn
cross section type is used the following parameters must
be set:
- inSpeciesAtomicWeight (real)
Atomic weight of the incident species.
- inSpeciesName (string)
Name of the element of the incident species.
functionDefined Parameters¶
If the functionDefined
cross section type is used, the following
parameters must be set:
- OAFunc (block, required)
An OAFunc block of name
crossSectionFunc
must be used inside the Interaction block. The OAFunc block allows the user to define its own cross section for the interaction, either through a two-column data file or through an expression. The kinds of OAFunc available for this interaction areinterpolatedFromFile
,LXcatFile
, orexpression
. The OAFunc must return the value of the cross section in m2.Please see OAFunc Block for more information on the OAFunc block.
- crossSectionVariable (string, optional, default = velocity)
Used in the case when an OAFunc function is given for the cross section to specify whether the parameter of the function is either the:
relative collision velocity magnitude of the incident particle in m-1:
crossSectionVariable = velocity
kinetic energy of the incident particle in eV:
crossSectionVariable = energy
Example binaryChargeExchange Block¶
<Interaction chargeXchange>
kind = binaryChargeExchange
inSpeciesA = oxygen0
inSpeciesB = oxygen1
outSpeciesA = oxygen1
outSpeciesB = oxygen0
inSpeciesAtomicWeight = 16.0
speciesName = oxygen
crossSection = builtIn
</Interaction>