Anton Paar TTK 600, Reference Manual

Page: 44 / 85

8 Performing a Measurement
44 D52IB001EN-G
8 Performing a Measurement
This chapter describes all activities related to using
TTK 600 for an in-situ X-ray diffraction measure-
ment.
8.1 Adjusting the Knife Edge
TTK 600 is equipped with a knife edge, which can
be used to reduce the X-ray background signal for
small 2

angles. The minimum height H of the knife
edge above the sample surface must be adjusted to
the required maximum 2

angle and the beam
height (divergence slit):
where R= radius of the goniometer in [mm]

=
1
/
2
x beam divergence angle in [deg]

m
=
1
/
2
x maximum 2

angle in [deg]
Fig. 48: Adjusting the knife edge
The knife edge is easily attached and detached as it
is magnetic. To put it in, just hold it close to the
adapter at the back of the chamber and it will attach
in the correct position automatically.To take the
knife edge out, extract it from its position.
The height of the knife edge can be adjusted as fol-
lows:
Use the delivered Torx screw driver to adjust the
height of the knife edge. Clockwise rotation
increases the height, whereas counter-clock-
wise rotation decreases the height.
8.2 Preparing the Sample
8.2.1 Additional Information for the Standard
Sample Holder
The sample holder (1) of the TTK 600 is made of
nickel, providing a good thermal conductivity and
mechanical properties as well as high corrosion re-
sistance.
Three sample holders with different depths of the
sample cavity (0,8 mm, 0,2 mm or flat) are avail-
able.
In addition a zero background holder with a specially
cut silicon insert can be used to avoid X-ray back-
ground signals from the sample holder. This is par-
ticularly useful for organic samples with high X-ray
transmission.
A Pt100 sheath resistance temperature sensor (2) is
encapsulated in the sample holder (1), providing ex-
act temperature measurement. A connector for the
Pt100 (3) permits fast and easy exchange of the
sample holder.
Before the instrument is used for the first time, the
insulation of the heater has to be installed. This can
be done in the following way:
1. Remove the sample holder (refer to
chapter 8.2.4) and the beam knife (refer to
H mm
 
R

sin


m

–
 
cos
------------------------------

NOTICE
- Adjust the height of the knife edge before
you prepare the sample.
- If you don’t measure at small 2

angles,
remove the knife edge from TTK 600 to
avoid accidental blocking of the beam and
to make sample holder handling more
convenient.
NOTICE
There are separate Knife Edges for all three
types of sample holders available.