2 Overview
C58IB004EN-D
9
2.2 Design of the Instrument
The DHS 1100 consists of:
l
Fig. 2-1: DHS 1100
1
Dome
2
Housing
3
Turnable cooling ring with outlets for cooling air
4
Quick coupling connection for cooling air supply
5
Supply hose for gas/vacuum and temperature control
The DHS 1100 has an air cooling system, which has
the advantages that only one hose is needed for the
cooling agent and that no liquid can leak inside the
cabinet in case of a defect.
The cooling gas, preferably clean compressed-air,
is distributed around the chamber inside the turn-
able cooling ring (3). Small outlets in the ring direct
the gas onto the housing (2) and the dome (1). The
cooling ring is turnable so that the connector for the
cooling air hose (4) can be placed in a position
where it does not interfere with the incident and dif-
fracted X-ray beams.
The cooling air supply is controlled with the
CCU 100 Combined Control Unit, which automati-
cally turns on the cooling air when the heater tem-
perature reaches 200 °C.
In order to achieve the maximum movability of the
DHS 1100 on the goniometer, the number of hoses
to the instrument is kept to a minimum. Besides the
hose for the cooling gas there is only one additional
hose (5) which contains the electrical wires for ther-
mocouple and heater and which is used to evacuate
the dome or to fill it with gas.
2.2.1 Dome
Fig. 2: Graphite Dome
Fig. 3: PEEK Dome
1
Dome
2
Fixing ring
3
Clasps
The graphite dome is made of graphite, which ex-
hibits an excellent combination of good mechanical
properties, high temperature resistance and excel-
lent X-ray transmission.
The PEEK dome is made of PEEK, a synthetic ma-
terial based on polyetheretherketone resin. This ad-
vanced plastic exhibits a unique combination of
good mechanical properties, high temperature re-
sistance and excellent chemical resistance. The
glass transition temperature of PEEK is in the range
of 140 °C.
NOTICE
Risk of damage
Do not disconnect the supply hose from the
DHS 1100 housing, because the connecting
wires from the thermocouple and the heater can
be damaged.
5
2
3
4
1
1
2
3
1
3
2