9
Anatomy of a CSS450
When in use, the sample is placed between two
highly polished quartz windows that are parallel
to within 2mm and each window is in close ther-
mal contact with a silver heater. The Base win-
dow, located within the lower section of the shear-
ing stage, is attached to a metal carrier that can
rotate under the control of the Shear Motor. This
motor is micro-stepped and has a specification of
51200 steps per revolution.
The Shear Motor can drive the system in three
ways; steady velocity, step movement at constant
velocity and an oscillatory motion with constant
frequency and amplitude.
When in use, the Lid is fixed on top of the Base.
The gap between the windows can be set from 5
to 2500
μ
m and this is controlled by a stepping
Gap Motor and micrometer built inside the body
of stage. The speed at which the Lid moves up
and down may also be set. Sensors in the body of
the stage and Lid will determine the upper and
lower limits.
1. Water cooling connectors
2. Window clamping ring
3. 32mm tapered quartz Lid window (W32TQ)
4. 55mm quartz Base window (W55Q)
5. Window carrier
1
1
2
3
Lid
5
1
1
1
1
2
Base
4
5
