Setting and Adjustment
36
MiniFlex 600: Benchtop X-ray Diffractometer
②
The MiniFlex 600 measures direct beam under the following slit
conditions. 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 in
7
.
DS=1.25°, SS=absorber (Cu 0.3 mm x 1), RS=0.3 mm
* 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. 6.2.12) 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).
