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This record is used to describe detector specific parameters. In version
1.2 up to 5 different x-ray and electron detectors may be specified. The
detector locations may be adjusted in the &MSETUP namelist.
EDTHSZ --- Solid Angle of Acceptance (Electron)
In Sesame 1.2 electron detectors (analysers) are assumed to be annular.
This variable specifies the polar angle spread of acceptance of the detector.
A minimum and a maximum value is to be specified.
Example: For a CMA with an angular spread of
specify :
EDTHSZ = 39,45

ENFWHM --- Reference Energy for FWHM
This variable specifies a reference energy in eV at which the energy resolution
is determined by the full width at half maximum value specified by means of the
FWHM variable. According to the equation in Chapter 6.3
the energy-dependent resolution can be calculated for all x-ray peaks.
The index of ENFWHM refers to the detector number. The default value
of 5899 eV corresponds to the
line.
For further information see Chapter 6.3.

FEDTRN --- Transmission of Analyser (Electron)
With FEDTRN files containing the energy dependent transmission curve
of the electron analyser can be specified.
The file format is analog to the format described for FEDEFF.
In the current version a maximum of 50 datapoints can be specified.
During simulation transmission of the analyser is linear interpolated
to obtain values intermediate to the specified energies.
Caution: transmission is cut off at maximum and minimum specified energy value.
If no transmission is specified, transmission is assumed to be unity at all
energies (default). For further information see also Chapter 6.4.

FWHM --- Full Width at Half Maximum
This variable specifies the full width at half maximum at the reference energy
defined by means of the ENFWHM variable.
According to the equation in Chapter 6.3
the energy-dependent resolution can be calculated for all x-ray peaks.
The index of FWHM refers to the detector number. The default value
is 150 and corresponds to the energy resolution of a common energy-dispersive
x-ray detector at the energy of the
line.
For further information see Chapter 6.3.

SOLIDA --- Solid Angle of Detection
This variable specifies the solid angle of detection in steradians.
The index of SOLIDA refers to the detector number.
For further information see Chapter 6.3.

XDTYPE --- X-ray Detector Type
This variable specifies the x-ray detector type. Energy-dispersive or
wavelength-dispersive detector systems may be chosen.
The index of XDTYPE refers to the detector number. The default value
refers to an energy-dispersive detector.
For further information see Chapter 6.3.

XFDEFF --- File Name for X-ray Detector Efficiency
This variable specifies the file name of an ASCII file containing the x-ray
detector efficiency. The format of this file is: 1. column: Energy 2. column:
Detector Efficiency. Comment lines must show a ''#'' as the first character of
the line (see also Chapter 6.3).

XLAYDN --- X-Ray Detector Layer Density
This variable specifies the densities in
of all layers of an x-ray
Si(Li)-detector, including the detector window and the active area (see also
Chapter 6.3).

XLAYMAT --- X-Ray Detector Layer Materials
This variable specifies the compositions of the x-ray detector layers.
XLAYMAT is exactly defined according to ATMAT, the
array for specifying the target composition, in the &TARGET namelist.
XLAYMAT contains the chemical abbreviations of all
elements of the detector layers and their relative fractions.
The chemical abbreviations in one layer as well as the strings
describing different layers must be separated by commas ( Note: strings
must be enclosed by single quotes!). Relative fractions of elements in one
layer must, if necessary at all, be specified right after the corresponding
chemical abbreviation without a blank, comma or any other character inbetween.
XLAYMAT(2,3)='AL2,O3', for instance, means that the 3rd layer of detector
number 2 consists of two parts aluminum and three parts oxygen. The relative
fractions in each region will be automatically normalized to unity. This
means 'AL2,O3' and AL0.4,O0.6 is equivalent.

XLAYTH --- X-Ray Detector Layer Thicknesses
This variable specifies the thicknesses of all layers of an x-ray detector
system in microns, including the detector window and the active area. The last
entry in the XLAYTH array with a value greater than zero is considered to
describe the active area. The detector efficiency is calculated according to
Beer's law (see Chapter 6.3).

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