[ Identification | Description | Input parameters | Output parameters | Links ]
Sapphire_Filter
ComponentThis sapphire filter, defined by two identical rectangular opening apertures, is based upon an absorption function absorp=exp(L*A+C*(exp(-(B/L^2+D/L^4)))) decribed by Freund (1983) Nucl. Instrum. Methods, A278, 379-401. Default values are for Sapphire at 300K as found by measurement (Mildner & Lamaze (1998) J. Appl. Cryst. 31,835-840 The transmission in sapphire only depends slightly on temperature. The above formula has only been verified at wavelenths between 0.5 and 14 AA (0.4 meV 0.3 eV). A filter of this type is used in the Eiger beamline at PSI to cut of high energy neutrons.WARNING: This is a contributed Component.
Name | Unit | Description | Default |
---|---|---|---|
xmin | m | Lower x bound (-0.16) | |
xmax | m | Upper x bound ( 0.16) | |
ymin | m | Lower y bound (- 0.16) | |
ymax | m | Upper y bound ( 0.16) | |
len | m | Thickness of filter ( 0.10) | |
A | m^-1 AA^-1 | Material constant | 0.8116 |
B | AA^2 | Material constant | 0.1618 |
C | m^-1 | Material constant | 21.24 |
D | AA^4 | Material constant | 0.1291 |
Sapphire_Filter.comp
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[ Identification | Description | Input parameters | Output parameters | Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Thu Mar 15 18:49:41 2012