5 Putting HTK 1200N into Operation
24
B40IB006EN-D
2. Move the chamber up or down by means of the
adjusting screw (2).
3. When you have found the desired position,
tighten the fixing screws (1) again.
Adjusting screw:
-
turn clockwise -> move chamber upwards
-
turn anti-clockwise -> move chamber down-
wards
Alternative method
An alternative method of height adjustment is to let
the X-ray beam pass above the alignment slit, and
turn the HTK 1200N housing until the X-ray beam is
achieving maximum intensity.
The aim of this method is to find the alignment slit
more easily by lifting the sample holder (using the
alignment equipment) until the intensity reaches a
maximum again. Then, turn the HTK 1200N housing
to exactly align the sample holder with the
-zero
line.
Measure a standard sample to check for proper
height alignment. Compare the measured values
with known standard values.
5.3 Height Adjustment with Motorized
Alignment Stage
Motorized alignment stages are remote controlled.
The height (z-position) of HTK 1200N can be adjust-
ed from outside the diffractometer enclosure.
Benefits of a motorized alignment stage compared
to manual alignment:
•
The alignment stage makes the z-alignment
procedure much easier: no more loosening of
screws at the adapter, no inaccuracies due to
tolerances at mechanical parts.
•
The alignment stage allows re-alignment to be
performed at any temperature and while the X-
ray beam is on.
•
The alignment stage offers an accuracy of <
5 µm.
•
Digital display of the chamber position is possi-
ble.
TIP: For information about the operation of the mo-
torized alignment stage, read the Alignment Stage
Instruction Manual.
5.4 Adjustment of Chamber Rotation
The HTK 1200N chamber must be aligned on the
goniometer so that the sample holder surface is par-
allel to the
-zero line of the diffractometer (
-align-
ment).
TIP: The procedure for rotating HTK 1200N relative
to the goniometer depends on the type of diffractom-
eter. Refer to the Diffractometer Instruction Manual
for details.
5.5 Alignment procedure
If the chamber rotation is not aligned, carry out the
procedure described below with the standard sam-
ple holder first (coarse alignment) and repeat it with
the aligment slit.
NOTICE
Risk of Damage
•
Remove the alignment slit before starting a
measurement!
•
Do not heat up the chamber when the align-
ment slit is still mounted! This will lead to
destruction of the alignment slit and the sam-
ple carrier.
2
1
NOTICE
Risk of Damage
The procedure described in this section requires
that the detector is moved into the
primary X-
ray beam
. Always
use
an
appropriate beam
attenuator
and read the relevant sections in the
Diffractometer Instruction Manual
before you
start the alignment.
