FISCHER FISCHERSCOPE X-RAY 4000 Series, Operator'S Manual

Page: 15 / 170

FISCHERSCOPE
®
X-RAY 15
Components
2.4 Components
2.4.1 Aperture (Collimator)
The aperture is used to limit the size of the primary x-ray beam to a defined diameter or
cross-section.
The aperture is a borehole with defined geometries (rectangular or round) and sizes,
through which part of the primary x-ray beam passes. Thus, a fraction of the primary radi-
ation is suppressed.
A reproducible, controlled and defined primary x-ray beam geometry is an important
prerequisite for good measurement accuracy.
To create ideal excitation conditions for every measurement, the instrument is equipped
with several electrically changeable apertures, see the Technical Data Sheet in the
addendum of this document. Using the software, you can select the optimum aperture for
the respective measurement application.
To select the aperture:
1. In the WinFTM main window select Product > Modify… .
The window Modify product appears.
2. Select the tab Application .
3. Click Collim. .
4. Select the collimator and click OK .
2.4.2 Shutter
The shutter is used to keep the primary x-rays from entering the measurement chamber
and the environment.
The shutter is part of the safety system. The shutter closes immediately, when a malfunc-
tion occurs. X-rays can then no longer reach the measurement chamber and the environ-
ment.
2.4.3 Specimen Lighting
The specimen lighting ensures good visibility of the specimen in the video window. The
lighting elements are white LEDs that are located in the area of the aperture.
Use the slide control in the video window to adjust the intensity of the illumination.