Optics Alignment (Required for Periodic Inspection or Installing X-Ray Tube)
MiniFlex 600: Benchtop X-ray Diffractometer
55
Fig. 6.2.35 D/teX center position correction window
6
Adjust the X-ray tube in vertical direction to position the direct beam
at an angle of 2θ/θ = 0º.
①
Select
Control
-
Manual Control
.
②
MiniFlex 600 measures direct beam under the following slit
conditions.
③
If the intensity of the direct beam is not within the range of 2,000 to
100,000cps, adjust the intensity by changing the number of absorbers
or the tube voltage output (see Fig. 6.2.10)
DS=1.25°, SS=absorber (Cu 0.3 mm x 1), RS=0.3mm
*The 1.25° slit is inserted into DS, but the slit width becomes 0.1 mm
at 2θ/θ
＝
0° due to the variable DS.
*If the intensity is too strong, counting loss (dead-time) occurs and the
correct peak shape (see Fig. 6.2.37) cannot be obtained. When there
are concerns that counting loss (such as the top peak becoming flat,
or being separated into two peaks due to decrease of peak intensity)
may occur, add an absorber or change the tube voltage output. For
example, if it is too strong with 30 kV -10 mA, decrease to 26 kV
-10 mA.
・
Manual Control
is used for the measurement of direct beam position.
Turning X-rays on and off must be done manually in
Manual Control
.
・
Specification A
(including Japan):
X-ray generation is turned OFF when the door button is pressed to open the
door. After adjustment is completed, close the door and set
X-Ray ON
in the
XG Control
window to set the X-ray output again.
Specification B
:
The door can be opened while X-Ray is maintained ON (The X-ray shutter is
closed).
